Exoplanet X-ray irradiation and evaporation rates with eROSITA

Abstract

High-energy irradiation is a driver for atmospheric evaporation and mass loss in exoplanets. This work is based on data from eROSITA, the soft X-ray instrument aboard SRG (Spectrum Roentgen Gamma) mission, as well as archival data from other missions, we aim to characterise the high-energy environment of known exoplanets and estimate their mass loss rates. We use X-ray source catalogues from eROSITA, XMM-Newton, Chandra and ROSAT to derive X-ray luminosities of exoplanet host stars in the 0.2-2 keV energy band with an underlying coronal, i.e. optically thin thermal spectrum. We present a catalogue of stellar X-ray and EUV luminosities, exoplanetary X-ray and EUV irradiation fluxes and estimated mass loss rates for a total of 287 exoplanets, 96 among them being characterised for the first time from new eROSITA detections. We identify 14 first time X-ray detections of transiting exoplanets that are subject to irradiation levels known to cause observable evaporation signatures in other exoplanets, which makes them suitable targets for follow-up observations.

13 pages, 11 figures. To appear on A&A, Special Issue: The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG Mission. Electronic data table will be made available on VizieR

References in corpus (29)

• The eROSITA X-ray telescope on SRG
• Most 1.6 Earth-Radius Planets are not Rocky
• Atmospheric Escape from Hot Jupiters
• A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
• Second ROSAT all-sky survey (2RXS) source catalogue
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• The SRG X-ray orbital observatory, its telescopes and first scientific results
• The eROSITA Final Equatorial Depth Survey (eFEDS): The X-ray catalog
• The first XMM-Newton slew survey catalogue: XMMSL1
• The active lives of stars: a complete description of rotation and XUV evolution of F, G, K, and M dwarfs
• Lyman-$\alpha$ Transit Spectroscopy and the Neutral Hydrogen Tail of the Hot Neptune GJ436b
• Is Proxima Centauri b habitable? -- A study of atmospheric loss
• XUV-driven mass loss from extrasolar giant planets orbiting active stars
• Magnetically controlled mass loss from extrasolar planets in close orbits
• Indications for an influence of Hot Jupiters on the rotation and activity of their host stars
• TESS delivers its first Earth-sized planet and a warm sub-Neptune
• EUV irradiation of exoplanet atmospheres occurs on Gyr timescales
• The Interaction of Venus-like, M-dwarf Planets with the Stellar Wind of Their Host Star
• The HU Aqr planetary system hypothesis revisited
• The XMM-Newton serendipitous survey. X: The second source catalogue from overlapping XMM-Newton observations and its long-term variable content
• Two young planetary systems around field stars with ages between 20-320 Myr from TESS
• X-ray irradiation and evaporation of the four young planets around V1298 Tau
• High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
• Swift UVOT near-UV transit observations of WASP-121 b
• Effect of stellar flares on the upper atmospheres of HD 189733b and HD 209458b
• GJ 436b and the stellar wind interaction: simulations constraints using Ly$\alpha$ and H$\alpha$ transits
• The imprint of X-ray photoevaporation of planet-forming discs on the orbital distribution of giant planets
• Testing the planetary models of HU Aquarii
• Four Small Planets Buried in K2 Systems: What Can We Learn for TESS?

Cited by in corpus (20)

• The SRG/eROSITA all-sky survey: First X-ray catalogues and data release of the western Galactic hemisphere
• SO2, silicate clouds, but no CH4 detected in a warm Neptune
• The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation
• First eROSITA study of nearby M dwarfs and the rotation-activity relation in combination with TESS
• A detailed analysis of the Gl 486 planetary system
• The TIME Table: Rotation and Ages of Cool Exoplanet Host Stars
• TOI-1268b: the youngest, hot, Saturn-mass transiting exoplanet
• The Variable Detection of Atmospheric Escape around the young, Hot Neptune AU Mic b
• Hyades Member K2-136c: The Smallest Planet in an Open Cluster with a Precisely Measured Mass
• A first eROSITA view of ultracool dwarfs
• The CARMENES search for exoplanets around M dwarfs. Behaviour of the Paschen lines during flares and quiescence
• TOI-5108 b and TOI 5786 b: Two transiting sub-Saturns detected and characterized with TESS, MaHPS and SOPHIE
• Is planetary inward migration responsible for GJ 504's fast rotation and bright X-ray luminosity? New constraints from eROSITA
• The high-energy environment of the heavy sub-Earth GJ 367 b indicates likely complete evaporation of its atmosphere
• X-ray variability of the triplet star system LTT1445 and evaporation history of the exoplanets around its A component
• The first evidence of tidally induced activity in a brown dwarf-M dwarf pair: A Chandra study of the NLTT 41135/41136 system
• Three young planets around the K-dwarf K2-198: High-energy environment, evaporation history and expected future
• Is the high-energy environment of K2-18b special?
• Estimating the Mass Escaping Rates of Radius-valley-spanning Planets in the TOI-431 System via X-Ray and Ultraviolet Evaporation
• Probing habitable regions with SRG/eROSITA