Conveners
Poster Presentations
- Don Pollacco
The quest for exoplanet discoveries has been significantly advanced by searching stellar light curves from space missions like CoRoT, Kepler, K2, and TESS. Traditional detection pipelines, employing methods such as the Box Least Squares (BLS), search these light curves for periodic transits. However, these methods often overlook single transits, especially those with shallow depths of smaller...
The effects of star spots on the detectability of transiting exoplanets is not well understood across stellar types and transit depths. I will present work done on simulating light curves for a range of stellar parameters and planet orbital parameters relevant to the upcoming PLATO mission. These simulations include realistic, time-evolving, star spot distributions across the stellar surface,...
Planets orbiting close to their stars are strongly influenced by stellar tidal forces which deform the shape of the planet. Measuring the deformed shape of such exoplanets allows to better constrain planetary properties such as their true radii and densities. Furthermore, measuring deformation can reveal crucial information about the interior structure of such planets since the degree of...
The newly selected Venus missions EnVISION and VERITAS (Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy) offer new opportunities for studying Venus but will also contribute to furthering our knowledge of Venus as an exoplanet. Hot rocky planets are favored targets due to generally more frequent transits than cooler Earth-like objects. In this work we simulate Venus as an...
In the past decade, correlations between stellar elemental abundances of planet hosting stars and their orbiting bodies have been extensively explored in multiple studies (e.g. Adibekyan+, 2012a; Santos+, 2017a & b; Teske+, 2019; Tautvaiลกienฤ+, 2022). There is a broad consensus on the prevalence of giant-planets around metal-rich stars (e.g. Fischer and Valenti, 2005; Adibekyan+, 2012a;...
We have developed the Transit Investigation and Recoverability Application (TIaRA) pipeline, a tool for making sensitivity maps for transit surveys based on the timestamps and precision of the photometry. We combine these with occurrence rates derived from Kepler to estimate yields for transit surveys. We apply TIaRA to the TESS Southern Ecliptic Hemisphere, and predict 2271(+241โ138)...
As the Venus decade approaches, one of the outstanding questions to be addressed by the future missions that will investigate the hellish twin sister of the Earth, is what can Venus tell us about terrestrial potentially habitable exoplanets. Recent studies indicated that some exoplanets - both terrestrial and gaseous - may be characterized by dense atmospheres possibly rich in CO2, just like...
The first long pointing field of PLATO has been recently selected (LOPS2). Accurate characterization of this region of the sky is of great relevance for the preparation and future success of PLATO. It is possible to derive space-based photometry of stars in LOPS2 before the launch of PLATO given that the TESS satellite has repeadetly observed it during the past years. The DIAmante pipeline is...
The study of exoplanet satellites, commonly referred to as exomoons, holds promise in the fields of exoplanet formation, astrobiology, and planetology. Research on planets within the Solar System suggests that satellites play a crucial role in fostering internal activity on Earth-like planets. Consequently, the potential presence of an exomoon orbiting an exoplanet becomes a significant...
The ESA PLATO (PLAnetary Transits and Oscillations of stars) mission aims at the detection and characterisation (radii, mass, density, age) of terrestrial exoplanets in orbits up to the habitable zone around Sun-like stars. To achieve these goals, an optimised complementary Ground-based Observations Programme (GOP) is set up with the purpose to provide the spectroscopic, photometric and...
Introduction: As more accurate Telescopes and missions are developed, the number of exoplanet detections keep increasing. The characterization of these planets and their statistical investigations are important steps to understand the formation of the planet and planetary system. Additionally metallicity plays a critical role in planet formation mechanisms. An updated version of the parameters...
Context. Transmission spectroscopy is a prime technique to study the chemical composition and structure of exoplanetary atmospheres. Strong excess absorption signals have been detected in the optical Na I D1, 2 Fraunhofer lines during transits of hot Jupiters, which are attributed to the planetary atmospheres and allow us to constrain their structure. Aims. We study the atmosphere of WASP-7 b...
Recent advancements in astronomical polarimetry have enabled the detection and characterization of exoplanets, providing insights into their orbital parameters, atmospheric composition, and reflective properties. By combining polarimetric studies with spectroscopy and photometry, a comprehensive understanding of exoplanets, including non-transiting hot Jupiters like Ups And b, can be achieved....
The growing volume of data from space missions renders manual exoplanet candidate identification impractical. Machine learning offers a solution, but conventional methods struggle with signal noise inherent in observations. This work proposes a conceptual trial for a novel deep learning approach to exoplanet classification using convolutional neural networks (CNNs). We introduce a technique...
We present our synergic strategy that merges the potential of asteroseismology with solar space climate techniques in order to characterize solar-like stars and their interaction with hosted exoplanets. The method is based on the use of seismic data obtained by the space missions TESS Transiting Exoplanet Survey Satellite, coupled with stellar activity estimates deduced from ground-based...
It is the optimal time to characterize the Earth-like exoplanets to detect biosignatures beyond the Earth because such exoplanets will be the prime targets of big-budget missions like JWST, HabEx, LUVOIR, ELT, HWO, etc. We modelled the phase curves of albedo and disk-integrated polarization by using appropriate scattering phase matrices and integrating the local Stokes vectors over the...
We will present the PLATOSpec project which is designed as ground-based support spectrographs of PLATO space mission. The instrument will be located at E1.52-m telescope at La Silla, Chile. PLATOSpec will have spectral resolving power of 70k and it will be efficient in blue wavelength range to characterise stellar variability. Here, first results from interim spectrograph PUCHEROS+, which...
The ESA M-class PLAnetary Transits and Oscillation of Stars (PLATO) mission will acquire light curves of pre-selected targets included in the PLATO Input Catalogue (PIC). PLATO primarily targets solar-type stars, but low mass stars will also be observed being of great interest within the exoplanet field. One of the target samples outlined in the Science Requirement Document is the P4...
The PLAnetary Transits and Oscillations of stars (PLATO) telescope is going to study a large number of extrasolar planetary systems. Given the design of the mission, PLATO will produce long-duration uninterrupted high precision photometry of a significant number of host stars and as a result, PLATO is best suited for phase curve studies of transiting exoplanets. We present a scientific...
New-generation of high contrast instruments (SPHERE/VLT, GPI/Gemini, SCExAO/Subaru) can be used to unveil features, in the form of giant moons or disks, within the Hill radius of directly imaged substellar objects.
Following a dedicated study on SPHERE observations, we detected a candidate satellite companion of 1 MJup on a 10 au orbit around the low-mass brown dwarf DH Tau B (10 MJup).
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