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Paolo Serra03/12/2018, 16:45Oral
I will discuss SKA-related work in the field of extragalactic HI astronomy. I will focus on recent, ongoing and upcoming science projects with a variety of telescopes -- including SKA pathfinders and precursors -- that will pave the way for SKA1 programs. I will discuss a few technical challenges such as RFI rejection/nulling, data volume and source finding; and I will present some exciting...
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Filippo Maccagni (INAF)03/12/2018, 17:10Oral
The MeerKAT Fornax Survey (MFS, PI Paolo Serra) is a dedicated large survey project planned by the MeerKAT telescope, the South-African precursor of the SKA. The MeerKAT telescope was inaugurated in July 2018. As of early 2019, MeerKAT will observe for 900 hours the Fornax cluster to study its assembly of new gas-rich galaxies and groups and the physics of gas accretion occurring in its...
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Dane Kleiner (INAF)03/12/2018, 17:25Oral
The Australia Square Kilometre Array Pathfinder (ASKAP) is a new radio interferometer that is pioneering revolutionary Phased Array Feed (PAF) receivers, which are under consideration for future SKA instrumentation. I will give an update on ASKAP status, rollout and commissioning, and present the first results from WALLABY, the main extragalactic ASKAP HI survey that has been using an ASKAP...
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G. Umana / F. Bufano (INAF - OA Catania)04/12/2018, 12:30Oral
SKA precursors are going to revolutionize our view of the Milky Way. ASKAP is entering its regime phase and one of its large program, EMU, is the largest radio survey ever designed at the planned depth of 10 μJy/beam. In the wide context of the preparation for EMU and ASKAP we present the SCORPIO project, an ATCA survey of a patch of the Galactic plane, originally covering a ∼5-square-degree....
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Francesco Cavallaro (INAF-OA Catania)04/12/2018, 12:55Oral
SKA precursors have just started to collect data, whose amount is so huge that is somehow overwhelming scientists. And the data stream is going to blow up once the precursors will be fully operational, not to mention SKA itself. How are we preparing for this? Automation in data reduction and analysis is mandatory but it is still far to be complete with respect to all the cases the radio...
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Claudio Codella (INAF - Osservatorio Astrofisico di Arcetri)04/12/2018, 14:00Oral
The ingredients for the recipe to make a “habitable” planet like our own Earth are: a relatively small rocky planet, at the right distance from the host star, with a not too thick atmosphere rich in volatiles and capable of developing interstellar complex organic molecules (iCOMs) chemistry. Searches for exoplanets have shown a large degree of diversity in the planetary systems, and as yet is...
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Adriano Ingallinera (INAF - OA Catania)04/12/2018, 14:25Science with SKA Precursors and PathfindersOral
The improvement in sensitivity of radio telescopes is disclosing a brand new method for searching and characterizing extrasolar planets. Mutual magnetic interaction between an exoplanet and its parent star (or even one of its satellites) can give rise to a electron cyclotron maser emission (ECME), known as auroral radio emission. The radio emission has a peculiar signature in time and in...
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Marta Burgay (Istituto Nazionale di Astrofisica (INAF))04/12/2018, 16:15Oral
I will present an overview of the ongoing and planned activities of the italian radioastronomical community related to pulsar and Fast Radio Burst science, in view of the SKA.
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Federico Abbate (Istituto Nazionale di Astrofisica (INAF))04/12/2018, 16:40Oral
Globular clusters contain a large number of millisecond pulsars. Besides being extremely interesting by themselves, these pulsars are an invaluable tool to probe the cluster environment and dynamics. They can be used to search for the presence of an intermediate mass black hole in the center, ionized gas and its magnetic field. The SKA precursor MeerKAT is in a unique position as it is capable...
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Giancarlo Ghirlanda (Istituto Nazionale di Astrofisica (INAF))04/12/2018, 16:55Oral
Radio observations of the first gravitational wave event with an electromagnetic counterpart (GRB170817) has shown unexpected features. The long lived, slowly rising, non--thermal radio emission (together with optical and X--ray observations), between 10 and 200 days after the BNS merger, is consistent with being produced by either a narrowly collimated or an isotropic outflow with geometrical...
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Tiziana Venturi (INAF, Istituto di Radioastronomia)05/12/2018, 09:10Oral
In this talk I will overview the current open and hot questions in the area of radio emission from active galactic nuclei, and will address the impact the SKA and its precursors and pathfinders will play/are playing. I will further highlight the relevance of the SKA-VLBI in this field.
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Marisa Brienza (Istituto Nazionale di Astrofisica (INAF))05/12/2018, 09:35Oral
Low frequency observations have finally opened the way to the search and study of remnant radio galaxies. These sources represent the last evolutionary stage of radio galaxies when the jets have switched off, and have remained elusive and poorly understood so far. For a long time there have been claims that new sensitive surveys would lead to the discovery of many more remnant radio galaxies,...
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Annalisa Bonafede05/12/2018, 10:05Oral
Galaxy clusters are the host of complicated non-thermal phenomena, that are best visible at radio wavelengths. The current generation of radio instruments, such as the uGMRT, LOFAR, and the JVLA, are showing in these years new and interesting features regarding both the cluster magnetic fields and the non-thermal emission associated with the intra-cluster medium. In this talk, I will review...
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Valentina Vacca (Istituto Nazionale di Astrofisica (INAF))05/12/2018, 10:30Oral
During this talk I intend to present radio observations with the Sardinia Radio Telescope (SRT) of a region of the sky of 8°x8°, likely associated with an over-density traced by nine massive galaxy clusters at z≈0.1. The combination of the SRT data with observations from the NRAO VLA Sky Survey revealed the presence of 28 new diffuse synchrotron radio sources with radio emissivity and X-ray...
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Francesca Loi (Università di Bologna & INAF)05/12/2018, 10:45Oral
In the next years, thanks to the advent of the SKA we expect a revolution of our knowledge about cosmic magnetism. Its precursors and pathfinders are already pushing the current limits of sensitivity and resolution and they will allow us to study large scale magnetic fields with unprecedented details. In this talk, I will present a computational tool which can produce realistic synthetic...
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Andrei Mesinger05/12/2018, 12:00Oral
The birth of the first stars, black holes and galaxies heralded the end of the cosmic Dark Ages and the beginning of the Cosmic Dawn. The light from these objects heated and ionized almost every atom in existence, culminating in the Epoch of Reionization: the final major phase change of the Universe. This final frontier of astrophysical cosmology is undergoing a transition from an...
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Gianni Bernardi (Istituto Nazionale di Astrofisica (INAF))05/12/2018, 12:25Oral
The quest for the 21-cm signal from the Cosmic Dawn and subsequent Epoch of Reionization has taken an unexpected turn with the reported detection of a sky-average absorption trough centred at 78 MHz (z~17, Bowman et al., 2018) whose explanation challenges any current theoretical model. In this talk I will present competing observations aimed to confirm the reported detection. I will also...
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Marta Spinelli (Istituto Nazionale di Astrofisica (INAF))05/12/2018, 12:40Oral
Observations of the Epoch of Reionization (EoR) through the redshifted 21 cm line represent a new frontier in observational cosmology and have motivated the construction of several low frequency radio arrays.
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Detection of the redshifted 21 cm line emission is complicated by the contamination from foreground sources that are brighter by several orders of magnitude.
The dominant foreground is... -
Marco Bondi05/12/2018, 14:15Oral
Nowadays deep radio surveys reach micro-Jy level flux densities detecting mainly star-forming galaxies and radio-quiet AGN. These are the classes of objects which have been studied for decades in the infrared, optical and X-ray bands. Moreover, radio observations are unaffected by absorption and therefore are sensitive to all kinds of AGN indipendently of orientation (e.g. Type 1s and Type 2s)...
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Anna Zoldan (OATS - INAF)05/12/2018, 14:40Oral
In my talk, I will present results obtained using the state-of-the-art galaxy formation model GAEA, and its most recent version including prescriptions to partition the cold gas into its atomic and molecular components (Xie et al. 2017 - X17).
I will first discuss how the most recent observational measurements available for HI selected galaxies in the local Universe compare with prescriptions...
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Manuela Magliocchetti (IAPS-INAF)05/12/2018, 14:55Oral
Investigations of the population of radio-active AGN up to z=3.5 not only show that these sources are hosted by galaxies of very large, M*>10^10.5 Msun, stellar masses, but also that at all redshifts they reside in very massive dark matter halos, comparable to those associated with groups-to-clusters of galaxies. This result is found both via clustering studies and by directly pinpointing such...
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Daniel Molnar (Istituto Nazionale di Astrofisica (INAF))Oral
The SKA and its precursor instruments will probe the HI content of galaxies to an unprecedented depth enabling investigations of environmental effects in action, such as ram pressure stripping and gravitational interactions. These significantly impact the physical properties of gas in cluster galaxies, and hence regulate their growth. There are well-established observational evidence (e.g....
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Leonardo TestiOral
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