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09/09/2019, 09:15
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09/09/2019, 09:30
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09/09/2019, 09:55ELTs overviewTalk
An overview of TMT
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09/09/2019, 10:20Talk
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09/09/2019, 11:15ELTs overviewTalk
An overview of the ESO ELT
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09/09/2019, 11:40Galaxy Stellar Populations and star-formation historiesTalk
Instruments like HARMONI on the ELT will likely be able to observe the first spatially resolved spectra of the very earliest (z~10) galaxies. Contained within these spectra will be details of the very first and as of yet unobserved stars, i.e. Population III stars. Detecting the emission from Pop. III stars would provide significant insight into star formation, galaxy formation and evolution...
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09/09/2019, 12:08ELTs overviewTalk
MICADO will enable the ELT to perform diffraction limited near infrared observations at first light. The instrument's capabilities focus on imaging, but include also single object spectroscopy. I will describe the project and the instrument, and illustrate its science drivers. I will emphasize what we can expect from MICADO both in terms of directly resolving the structure of galaxies in the...
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09/09/2019, 12:34ELTs overviewTalk
I will present the results from the phase A study of ELT-HIRES, an optical-infrared High Resolution Spectrograph for ELT, which has been completed in 2018 by a consortium of 30 institutes from 12 countries forming a team of about 200 scientists and engineers. The top science cases of ELT-HIRES will be the detection of life signatures from exoplanet atmospheres, tests on the stability of...
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09/09/2019, 14:30ELTs overviewTalk
The E-ELT Multi-Object Spectrograph: latest news from MOSAIC
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09/09/2019, 14:55ELTs overviewTalk
The MOSAIC instrument, the only multi-objects spectrograph foreseen after first light on the ELT, will allow for an incredible leap forward in our understanding of how present-day galaxies formed and evolved.
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While JWST will discover over a thousand sources in the patrol field of MOSAIC, the latter will carry out their spectroscopic follow up thanks to the high spectroscopic sensitivity, the... -
09/09/2019, 15:13ELTs overviewTalk
The MAORY (Multi-conjugate Adaptive Optics RelaY) is a first light instrument for the European Extremely Large Telescope (ELT). It is the adaptive optics module that feeds MICADO and a still to be defined large Field of View instrument. We give an overview of the status, describing the instrument configurations. We also focus on strategy for the performance characterization in the framework of...
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09/09/2019, 15:31Galaxy AssemblyTalk
The last decade brought significant advances in the physical realism of hydrodynamical galaxy formation simulations. It is now critical to conduct meaningful comparisons of these simulations with observations --- to test the physical models underpinning the simulations and to help interpret the observations. I will show how we are using synthetic observations of simulations to interpret...
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09/09/2019, 16:22SynergiesTalk
We will review Euclid satellite, in particular details of the planned wide and deep surveys. The wealth of expected data is enormous and it will constitute a fantastic database for observations on large telescopes.
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09/09/2019, 16:47Galaxy Stellar Populations and star-formation historiesTalk
Within standard $\Lambda$CDM cosmology, Population III (Pop III) star formation in minihalos of mass $M_\mathrm{halo}> 5\times10^5$ M$_\odot$ provides the first stellar sources of Lyman$\alpha$ (Ly$\alpha$) photons. The Experiment to Detect the Global Epoch of Reionization Signature (EDGES) has measured a strong absorption signal of the redshifted 21 cm radiation from neutral hydrogen at...
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09/09/2019, 17:05SynergiesTalk
Over the next decade a number of facilities, that aim to detect neutral hydrogen in the Epoch of Reionization (EoR) through its 21cm spin-flip transition, will be crucial in shedding light on the propagation of ionized regions. However, establishing the veracity of the 21cm signal and understanding the global sources and topology of reionization will require combining 21cm data with that from...
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10/09/2019, 09:00Galaxy AssemblyTalk
TNG50 is the last installment of the IllustrisTNG project (www.tng-project.org), a series of three cosmological gravity+magnetohydrodynamics simulations for galaxy physics. It returns an unprecedented combination of statistics and numerical resolution, so that we can quantify the evolution of massive star-forming galaxies at high redshift while simultaneously following, for example, the...
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10/09/2019, 09:25Galaxy Stellar Populations and star-formation historiesTalk
Unveiling the active early galaxy assembly with emission-lines and ELTs
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10/09/2019, 09:50Galaxy AssemblyTalk
We have now completed the MOSFIRE Deep Evolution Field (MOSDEF) Survey of
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1500 galaxies in CANDELS fields at cosmic “high noon” (i.e., 1.4< z < 3.8). A total of 46 observing nights on Keck/MOSFIRE were allocated to this program to obtain near-infrared spectroscopy of these galaxies (selected in H-band). Using MOSDEF, we have studied rest-frame optical diagnostic lines and their relation with... -
10/09/2019, 10:10Galaxy AssemblyTalk
Recent advances in Integral-Field Units and dynamical modelling of the stellar kinematics provide a powerful way to unveil the structure of galaxies in the local Universe, while gravitational lensing is nature’s cosmic telescope to explore the properties of galaxies beyond the local Universe. We present a new approach that is able to unify the great tools of dynamical modelling of galaxies...
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10/09/2019, 10:30Galaxy AssemblyTalk
We investigate the properties of >130 Spitzer-selected galaxies at z > 6. We use the deepest Spitzer imaging in the COSMOS field from the SMUVS survey to constrain the stellar mass and dust-obscuration of these objects. We particularly study the number density of dusty sources at different high redshifts, in order to track their evolution after reionisation. We find that the number density of...
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10/09/2019, 11:18Galaxy AssemblyTalk
Passive galaxies in the early Universe: results and challenges
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10/09/2019, 11:44Galaxy Stellar Populations and star-formation historiesTalk
We search the five CANDELS fields for passively evolving a.k.a. ``red and dead'' massive galaxies in the first 2 Gyr after the Big Bang. By means of top-hat star-formation histories, to model an early and abrupt quenching of the activity, we fit the observed photometric data using a demanding probabilistic approach to single out only very reliable passive candidates. Using libraries of models...
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10/09/2019, 12:02Galaxy AssemblyTalk
One of the key open questions in galaxy evolution is how efficiently galaxies form stars as a function of cosmic time. In order to solve this problem, it is crucial to reconstruct the star formation rate density (SFRD) and its integral (the stellar mass assembly history) to the highest possible redshifts. However, the available information at z>3 is limited and biased towards UV-luminous...
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10/09/2019, 12:21Galaxy Stellar Populations and star-formation historiesTalk
In the Lambda CDM scenario, the smallest dark matter haloes are the first to collapse, and therefore we expect dwarf galaxies to be the sites of the earliest star formation activity in the Universe. Resolved stellar population studies of nearby dwarf galaxies are extremely valuable for probing the early Universe, since they allow us to reconstruct the dwarfs' star formation histories with...
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10/09/2019, 12:42
Current facilities, especially spectroscopy, do not yet have the power required to study
The assembly of the mass and the transformations of galaxies’ structures are the result of the interplay between gravity, baryon physics and the properties of the dark matter on the one hand, and formation of, and feedback by, stars and black holes on the other. How do massive galaxies transition form...
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10/09/2019, 14:20
It has been claimed for decades that almost all galaxies in the local Universe host at their centre a super-massive black hole (SMBH) the mass of which appears to be tightly correlated with the stellar mass and the random motion ("velocity dispersion", sigma) of the stars of the host galaxy. In this talk I will first review the state of the art in this field. I will then highlight that...
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10/09/2019, 14:45
During the talk, I will first review the observational evidence for the existence of a connection between supermassive black holes and their host galaxies, and its evolution as a function of cosmic time. I will then move to describe what I believe to be the most pressing questions that still need answering, and the role the next generation of 30m optical/NIR facilities will play in advancing...
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51. Insights into the high redshift Universe from cosmic noon studies of CIII] and CIV (Andra Stroe)10/09/2019, 15:10Gas and dust in galaxiesTalk
While traditionally associated with AGN, the properties of the rest-frame UV CIII] and CIV emission lines are still uncertain as large, unbiased samples of sources are scarce. Recently, CIII] and CIV emission lines have been observed in galaxies in the early Universe ($z>5$) and have been proposed as the prime way of measuring their redshift and studying their stellar populations. I will...
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10/09/2019, 15:30CGM/ICM/IGM/Chemical EnrichmentTalk
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10/09/2019, 16:20Early Black Hole FormationTalk
The early growth of the first supermassive black holes
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10/09/2019, 16:45Early Black Hole FormationTalk
Results from numerical simulations including non-equilibrium chemistry, stellar evolution, metal spreading and raditive transfer will be discussed in order to shed light on the primordial cosmological epochs. Simulation results will be compared against observational data and employed to study the formation of the first galaxies, investigate their impact on high-z dumped Lyalpha gas and GRB...
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10/09/2019, 17:05
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10/09/2019, 17:25SynergiesTalk
Our knowledge of the high redshift galaxies responsible for reionising the Universe is constantly improving and will take yet another important step forward with future facilities. At the same time, constraints on the 21cm power spectrum from reionization are continually tightening, with a firm measurement from SKA-low likely in the coming years. In order to maximise what we can learn from...
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11/09/2019, 09:00Reionization and First LightTalk
The identification of young massive star clusters (YMCs) at cosmological distance
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is becoming a real fact. The occurrence of such systems is believed to increase at
high redshift, eventually enclosing a significant fraction of the star formation activity
of the Universe, in an epoch when also globular clusters (GC) formed. The potential role
of such stellar systems play during reionization,... -
11/09/2019, 09:25Reionization and First LightTalk
Strong gravitational lensing by galaxy clusters can magnify the light
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of background sources by factors of tens or more, pushing the current
observational limits towards the faint and distant Universe.
Thanks to coordinated programs using deep HST imaging (from large
programmes such as CLASH, Hubble Frontier Fields and RELICS) and
spectroscopy from MUSE in cluster fields, we can now... -
11/09/2019, 09:44Reionization and First LightTalk
The detection and characterization of early reionized regions will be a key topic for future Extremely Large Telescopes. In this talk I will present the first confirmation of a reionized overdensity at z~7 in the BDF field, based on a combination of deep HST and VLT multi-band imaging and VLT-FORS2 spectroscopy. The BDF field hosts a factor of ~3-4 overdensity of faint LBGs and three confirmed...
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11/09/2019, 10:03Reionization and First LightTalk
Reionisation was a process that lasted for most of the early history of the Universe and up to a redshift of 6. We propose to follow that history from redshift 15 to redshift 6. For that we should need a set of narrow band filters, spanning Ly_alpha from z~6 to z~14.
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We will perform imaging through those narrow band filters searching for Ly_alpha emitters at different redshifts. We are aware... -
11/09/2019, 10:22Reionization and First LightTalk
We report the discovery of 10-kpc scale [CII] 158um halos surrounding star-forming galaxies in the early Universe. We choose deep ALMA data of 18 galaxies each with a star-formation rate of ~ 10-70 Msun with no signature of AGN whose [CII] lines are individually detected at z=5.153-7.142, and conduct stacking of the [CII] lines and dust-continuum in the uv-visibility plane. The radial profiles...
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11/09/2019, 10:40Reionization and First LightTalk
In our current understanding of the reionization era, the sources responsible for the transition of the universe from a neutral Hydrogen state to an ionized state are likely faint, low mass, star-forming galaxies. One way to study this type of population is to determine the Luminosity Function (LF) of galaxies selected from their Ly-a emission. However, the current studies and their...
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11/09/2019, 11:28
Current astronomers clearly live in a golden area of astronomy, with an almost incessant march towards viewing the early universe in ever greater clarity and sensitivity, new observational facilities coming online ever 18 months that astound and amaze, and new scientific insights becoming available almost every few days. One of these areas where astronomers have been granted a completely new...
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11/09/2019, 11:54Talk
The epoch of reionization (6 < z < 10) marks the period in our universe when the first large galaxies grew to fruition, and began to affect the universe around them by burning off the haze of neutral gas that had filled the intergalactic medium (IGM) since recombination. The evolution of this process constrains key properties of these earliest luminous sources, thus observationally...
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11/09/2019, 12:20Reionization and First LightTalk
The enterprise of finding, confirming and characterising z>7 galaxies in the era of Cosmic Reionisation has developed rapidly in recent years, due to the combined power of HST, Spitzer and ground based-telescopes. An important development has been the discovery and study of luminous 7<z<9 galaxies with a red [3.6]-[4.5] micron colour whose prominent Lyman-alpha emission might indicate they lie...
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11/09/2019, 12:40Reionization and First LightTalk
Distant luminous Lyman-alpha emitters are excellent targets for detailed observations of galaxies in the epoch of reionisation . Spatially resolved observations of these galaxies allow us to simultaneously probe the emission from young stars, partially ionised clouds in the interstellar medium and to constrain the properties of surrounding hydrogen gas in the circumgalactic medium. Hence,...
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11/09/2019, 12:58Reionization and First LightTalk
Determining the period when the first galaxies emerged from a dark intergalactic medium represents a fundamental milestone in assembling a coherent picture of cosmic history. But the so-called ‘Cosmic Dawn’ period is not accessible yet directly by current ground-based and space telescopes. But it can be constrained following two different methods : simulations of the first population of...
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12/09/2019, 09:00Galaxy Stellar Populations and star-formation historiesTalk
I will present an overview of recent results on analogs of the sources of cosmic reionization and very low (or zero) metallicity galaxies, whose detection and understanding are among the major goals with the next generation of facilities.
For example, I will discuss new insight on the far-UV SED and HeII emission from low metallicity galaxies, which is of importance for modeling and...
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12/09/2019, 09:25Galaxy Stellar Populations and star-formation historiesTalk
In this talk I shall use stellar population models to showcase analysis that could be performed with the E-ELT.
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12/09/2019, 09:50Galaxy Stellar Populations and star-formation historiesTalk
Dwarfs are the most common galaxies and play a significant role in galaxy evolution. However, they are objects still poorly understood. Although most of these systems present an old stellar population, disagreements remain about the period of their dominant star-formation activity.
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Our objective is to investigate the dwarf galaxy population in building and acquiring samples of star-forming... -
12/09/2019, 10:09Galaxy Stellar Populations and star-formation historiesTalk
Astronomical observatories with large aperture telescopes, greater or equal to 20 meters in diameter, the so-called extremely large telescopes (ELTs), will provide high-quality data for applying spectral synthesis codes in order to accurately derive the star formation history (SFH) and Chemical Enrichment History (CEH) of galaxies. Therefore, extragalactic astronomy is on the verge of...
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12/09/2019, 10:59Feedback Processes in GalaxiesTalk
We present a detailed analysis of synthetic optical and UV emission lines of simulated galaxies out to the epoch of re-ionisation. The theoretical strong emission lines are derived from self-consistently coupling "new-generation" spectral models accounting for nebular emission from both young stars and AGN to new sets of high-resolved cosmological hydrodynamic zoom-in simulations of young...
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12/09/2019, 11:18
In this talk I will first review recent models of galaxy formation
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featuring the creation and evolution of dust in the ISM of galaxies
recently observed in the early universe ( z >4). Processes of dust
formation from stellar sources (see Marassi et al., 2019) will be
discussed, with a particular emphasis on the modeling of dust stellar
yields and the efficiency of the reverse shock process in... -
12/09/2019, 11:37Galaxy AssemblyTalk
Big eyes on the early formation of massive structures
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12/09/2019, 12:03Galaxy AssemblyTalk
We study the clustering properties of a sub-sample of the ALMA sources detected in GOODS-South using the GOODS-ALMA 1.1mm continuum survey (10'x6.7' area in GOODS-South). Out of a sample of five ALMA detections that are optically dark down to H=29AB, we find that four are consistent with being associated with an over-density of galaxies at z~3.5. After tracing the 10th neighbor surface density...
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12/09/2019, 12:21Galaxy AssemblyTalk
There is significant evidence suggesting that galaxies evolve differently depending on the environment they live in: dense regions of the universe host primarily red ellipticals, while blue spirals occupy the more under-dense regions. These properties are found to be governed by the star formation activity which is, thus, influenced by environment.
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Despite decades of research, little progress... -
12/09/2019, 15:00CGM/ICM/IGM/Chemical EnrichmentTalk
Galaxy formation and evolution is critically regulated by
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the flow of gas into and out of galaxies. While theoretical
models and cosmological simulations have extensively investigated
these phenomena and provided detailed predictions,
observations still lag behind due to observational difficulties
in detecting signatures of these processes, especially at
early cosmological epochs, when these... -
12/09/2019, 15:25CGM/ICM/IGM/Chemical EnrichmentTalk
I will present initial results from the VANDELS survey (DR2) quantifying the relationship between stellar mass and stellar metallicity for a sample of ~ 700 star-forming galaxies at 2.5 < z < 5.0. Stellar metallicities were determined for a set of high signal-to-noise ratio composite rest-UV spectra in bins of redshift and stellar mass (spanning the range 8.5 < log(M/Mo) < 10.2). We find...
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12/09/2019, 15:45Gas and dust in galaxiesTalk
The interstellar medium (ISM) of galaxies is composed of multiple components (molecular, neutral, ionized gas, and dust grains), which are related to each other through star formation — some are fuel for star formation (molecular gas) and some are the products of it (ionized gas, dust). Studying these different components simultaneously is crucial to fully understand the physics of star...
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12/09/2019, 16:05Gas and dust in galaxiesTalk
To obtain a reliable census of the star formation rate density of the universe, it is indispensable to measure the fraction of obscured star formation up to the epoch of reionization. One method to find distant starbursts - the so-called sub millimeter galaxies (SMGs) - is via strong lensing. I am presenting results from our on-going efforts via several (sub)mm facilities to reveal and...
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12/09/2019, 16:50CGM/ICM/IGM/Chemical EnrichmentTalk
GAs Stripping Phenomena in galaxies (GASP) is a program aimed at studying gas removal processes in nearby galaxies in different environments, using observations at different wavelengths (X, UV, optical, sub-mm, radio). The core of the program is an integral-field spectroscopic survey with MUSE at the VLT, that allows to study the spatially resolved properties of galaxies.
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I will present some... -
12/09/2019, 17:20Gas and dust in galaxiesTalk
Dust production is a very important issue in galaxy evolution. Unfortunately, we are still unable to determine its formation mechanism. I will present the investigation of dust production in nine galaxies at redshift z > 6, for which dust emission has been detected. In recent years, more accurate measurements were made using the most powerful instruments, eg ALMA, which contributed to better...
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12/09/2019, 17:40CGM/ICM/IGM/Chemical EnrichmentTalk
The advent of the E-ELT telescope in the next decade, combined with the new generation instruments, will provide astronomers with the possibility to reach a spatial resolution higher than ever before (16 times the actual HST resolution), combined with a collecting area larger than 20 times the largest actual telescopes. This new facility will then offer the possibility to study the stellar...
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78. The multiphase baryon cycle in galaxies and future prospects with the EELTs (Claudia Cicone) (I)13/09/2019, 09:00
Galaxy formation and evolution are driven by the (re)cycling of baryons in and out of galaxies. Active galactic nuclei and star formation can generate galaxy-scale outflows and fountains, which in part feed the extended interstellar and circum-galactic medium (ISM and CGM) reservoirs, and in part escape the galaxy halo hence enriching the intergalactic medium (IGM). In turn, cosmic inflows...
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13/09/2019, 09:25
Gas flow processes such as galactic winds and gas accretion are key to
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galaxy formation. The interface between galaxies and where most of the
baryons are (the inter-galactic medium) is where gas in and ouflows are
occurring and also where gas flows are directly connected to the
evolution of the host galaxy. For instance, galactic wind may remove
part or the totality of the ISM, and accretion... -
13/09/2019, 09:50Black Hole/Galaxy Co-EvolutionTalk
Quasars are known to be variable objects, which change their brightness in a wide range of time scales – from several hours to several years. In gravitational lens systems, we have an opportunity to observe the quasars intrinsic brightness variations repeated in all macroimages and shifted in time. One of the importance applications in astrophysics of measuring these time shifts is the study...
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13/09/2019, 10:08Gas and dust in galaxiesTalk
ALPINE is an ALMA large program designed to study gas and dust properties of a representative sample of more than one hundred main sequence star-forming galaxies with spectroscopic redshifts between 4 < z < 6, with SFR > ~10 M_Sun/yr and stellar mass ~9 < log(Mstar) < ~11.
I will present some results of the survey, focusing on:
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- properties of the observed interstellar-medium (including... -
13/09/2019, 10:27SynergiesTalk
Although more than 160 quasars have now been discovered at z > 6, little is known of their origins or early evolution for certain because observations to date have been limited to z = 7.5. This picture will soon change with the advent of the E-ELT and TMT, whose high sensitivities could allow them to detect these rare black holes at much earlier times. I will present synthetic NIR AB...
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13/09/2019, 11:16
We investigate a sample of 152 dusty sources at 1.5 < z < 2.5 to understand the connection of enhanced star formation rate (SFR) and black hole accretion rate. The sources are Herschel-selected, having stellar masses M * > 1010 M ☉ and SFR (∼100─1000 M ☉ yr−1) elevated (>4×) above the star-forming “main sequence,” classifying them as starbursts (SBs). Through a multiwavelength fitting approach...
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13/09/2019, 11:35
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13/09/2019, 11:54Reionization and First LightTalk
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13/09/2019, 12:20Black Hole/Galaxy Co-EvolutionTalk
Future JWST or any giant telescope imaging, intended to investigate the high-z Universe, are "contaminated" by a number of extended galaxies. They are either massive and/or low-z galaxies. Similarly, synoptic surveys like Euclid or LSST will commonly find such objects. We started their analysis with the study of the six most massive (>5x10^10 M_Sun) galaxies at z < 1 in the Hubble Ultra Deep...
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13/09/2019, 12:40
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ELTs overviewTalk
Galaxy evolution science with ELTs in (and after) the era of JWST” (Mark Dickinson)
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Reionization and First LightTalk
Lyman alpha emitters can be detected from the ground using narrowband filters images. With the 10 m GTC telescope, we sampled Goods North and detected a good number of sources from z 3 to more than 6. Some of them are in groups covering an area with projected sizes below 0.5"x0.5 ". The typical number of the galaxy group members are below 10. To get spectroscopy of the individual sources with...
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Feedback Processes in GalaxiesTalk
Theoretical models of AGN feedback predict that AGN-driven, galaxy
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wide ouflows are a fundamental process affecting the bulk of the
baryons in the universe. Hundreds of hours of observations from the
ground are being used to characterize such outflows and their impact
on the host galaxies using e.g. NIR IFU on 8-10m telescopes to trace
the ionized gas or the molecular phase with ALMA.... -
Galaxy Stellar Populations and star-formation historiesTalk
Studying single stars at cosmological distances is possible if the distant star is located near the caustic of a gravitational lens. This was proven possible recently with the observation of a star at redshift 1.49, Icarus, in Kelly et al. (2018) that was being lensed by the combination of a powerful lens (the galaxy clustr MACS1149) and a microlens inside the cluster. This type of alignments...
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Talk
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CGM/ICM/IGM/Chemical EnrichmentTalk
I present a study of the mass-metalliciy (MZ) relation in a redshift range of z ~ 0.3-3.4 using 33 star-forming
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galaxies selected by Gamma Ray bursts (GRBs) with emission metallicity measurements. GRBs are beacons
of star-forming galaxies up to very high redshifts. The detectability of these extremely bright and dust-penetrating
explosions is independent of the brightness and dust content...
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