715 citations · 4.6k across the 125 of their papers we have counts for
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Why M-dwarf flares have limited impact on the atmospheric evaporation of sub-Neptunes and Earth-sized planets
Andrea Caldiroli, Francesco Haardt, Elena Gallo +4
M-type stars are prime targets for exoplanet searches within their habitable zones (HZs). These stars also exhibit significant magnetic flaring activity, particularly during their…
Thermal Emission and Confirmation of the Frigid White Dwarf Exoplanet WD 1856+534b
Mary Anne Limbach, Andrew Vanderburg, Ryan J. MacDonald +12
We report the detection of thermal emission from and confirm the planetary nature of WD 1856+534b, the first transiting planet known to orbit a white dwarf star. Observations with…
Evaporation of Close-in Sub-Neptunes by Cooling White Dwarfs
Elena Gallo, Andrea Caldiroli, Riccardo Spinelli +5
Motivated by the recent surge in interest concerning white dwarf (WD) planets, this work presents the first numerical exploration of WD-driven atmospheric escape, whereby the high-…
Self-Consistent Modeling of Metastable Helium Exoplanet Transits
Federico Biassoni, Andrea Caldiroli, Elena Gallo +3
Absorption of stellar X-ray and Extreme Ultraviolet radiation in the upper atmosphere of close-in exoplanets can give rise to hydrodynamic outflows, which may lead to the gradual s…
Planetary parameters, XUV environments and mass-loss rates for nearby gaseous planets with X-ray detected host-stars
R. Spinelli, E. Gallo, F. Haardt +4
We leverage Gaia DR2 parallactic distances to deliver new or revised estimates of planetary parameters and X-ray irradiation for a distance-limited ( pc) sample of 27…
Irradiation-driven escape of primordial planetary atmospheres II. Evaporation efficiency of sub-Neptunes through hot Jupiters
Andrea Caldiroli, Francesco Haardt, Elena Gallo +3
Making use of the publicly available 1D photoionization hydrodynamics code ATES we set out to investigate the combined effects of planetary gravitational potential energy ($ϕ_p\equ…
Irradiation-driven escape of primordial planetary atmospheres I. The ATES photoionization hydrodynamics code
Andrea Caldiroli, Francesco Haardt, Elena Gallo +3
Intense X-ray and ultraviolet stellar irradiation can heat and inflate the atmospheres of closely orbiting exoplanets, driving mass outflows that may be significant enough to evapo…
A Coupled Analysis of Atmospheric Mass Loss and Tidal Evolution in XUV Irradiated Exoplanets: the TRAPPIST-1 Case Study
Juliette Becker, Elena Gallo, Edmund Hodges-Kluck +2
Exoplanets residing close to their stars can experience evolution of both their physical structures and their orbits due to the influence of their host stars. In this work, we pres…
X-ray Studies of Exoplanets: A 2020 Decadal Survey White Paper
Scott J. Wolk, Jeremy J. Drake, Graziella Branduardi-Raymont +28
Over the last two decades, the discovery of exoplanets has fundamentally changed our perception of the universe and humanity's place within it. Recent work indicates that a solar s…
On the detectability of star-planet interaction
Brendan P. Miller, Elena Gallo, Jason T. Wright +1
Magnetic (or tidal) interactions between "hot Jupiters" and their host stars can potentially enhance chromospheric and coronal activity. An ideal testbed for investigating this eff…