Search Publications
Modelling the He I triplet absorption at 10 830 Å in the atmospheres of HD 189733 b and GJ 3470 b
Sánchez-López, A.; López-Puertas, M.; Nagel, E. +16 more
Characterising the atmospheres of exoplanets is key to understanding their nature and provides hints about their formation and evolution. High resolution measurements of the helium triplet absorption of highly irradiated planets have been recently reported, which provide a new means of studying their atmospheric escape. In this work we study the e…
Magnetic helicity and energy budget around large confined and eruptive solar flares
Veronig, A. M.; Thalmann, J. K.; Gupta, M.
Context. In order to better understand the underlying processes and prerequisites for solar activity, it is essential to study the time evolution of the coronal magnetic field of solar active regions (ARs) associated with flare activity.
Aims: We investigate the coronal magnetic energy and helicity budgets of ten solar ARs around the times of…
HOLISMOKES. IV. Efficient mass modeling of strong lenses through deep learning
Halkola, A.; Suyu, S. H.; Cañameras, R. +4 more
Modeling the mass distributions of strong gravitational lenses is often necessary in order to use them as astrophysical and cosmological probes. With the large number of lens systems (≳105) expected from upcoming surveys, it is timely to explore efficient modeling approaches beyond traditional Markov chain Monte Carlo techniques that ar…
Weighing the Galactic disk using phase-space spirals. II. Most stringent constraints on a thin dark disk using Gaia EDR3
Monari, G.; de Salas, P. F.; Widmark, A. +1 more
Using the method that was developed in the first paper of this series, we measured the vertical gravitational potential of the Galactic disk from the time-varying structure of the phase-space spiral, using data from Gaia as well as supplementary radial velocity information from legacy spectroscopic surveys. For eleven independent data samples, we …
Large-amplitude variables in Gaia Data Release 2. Multi-band variability characterization
Audard, M.; Rimoldini, L.; Holl, B. +11 more
Context. Photometric variability is an essential feature that sheds light on the intrinsic properties of celestial variable sources, the more so when photometry is available in various bands. In this respect, the all-sky Gaia mission is particularly attractive as it collects, among other quantities, epoch photometry measured quasi-simultaneously i…
Density fluctuations associated with turbulence and waves. First observations by Solar Orbiter
Maksimovic, M.; Bale, S. D.; Chust, T. +21 more
Aims: The aim of this work is to demonstrate that the probe-to-spacecraft potential measured by RPW on Solar Orbiter can be used to derive the plasma (electron) density measurement, which exhibits both a high temporal resolution and a high level of accuracy. To investigate the physical nature of the solar wind turbulence and waves, we analyze…
Constraining the overcontact phase in massive binary evolution. I. Mixing in V382 Cyg, VFTS 352, and OGLE SMC-SC10 108086
Sana, Hugues; Justham, Stephen; Mahy, Laurent +10 more
Context. As potential progenitors of several exotic phenomena including gravitational wave sources, magnetic stars, and Be stars, close massive binary systems probe a crucial area of the parameter space in massive star evolution. Despite the importance of these systems, large uncertainties regarding the nature and efficiency of the internal mixing…
Efficiency of non-thermal desorptions in cold-core conditions. Testing the sputtering of grain mantles induced by cosmic rays
Fuente, A.; Dartois, E.; Spezzano, S. +4 more
Context. Under cold conditions in dense cores, gas-phase molecules and atoms are depleted from the gas-phase to the surface of interstellar grains. Considering the time scales and physical conditions within these cores, a portion of these molecules has to be brought back into the gas-phase to explain their observation by milimeter telescopes.
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Simple halo model formalism for the cosmic infrared background and its correlation with the thermal Sunyaev-Zel'dovich effect
Lagache, G.; Béthermin, M.; Maniyar, A.
Modelling the anisotropies in the cosmic infrared background (CIB) on all the scales is a challenging task because the nature of the galaxy evolution is complex and too many parameters are therefore often required to fit the observational data. We present a new halo model for the anisotropies of the CIB using only four parameters. Our model connec…
Constraints on the mass and on the atmospheric composition and evolution of the low-density young planet DS Tucanae A b
Borsa, F.; Micela, G.; Damasso, M. +9 more
Context. Observations of young close-in exoplanets are providing initial indications for the characteristics of the population and clues to the early stages of their evolution. Transiting planets at young ages are also key benchmarks for our understanding of planetary evolution via the verification of atmospheric escape models.
Aims: We perfo…