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The XUV environments of exoplanets from Jupiter-size to super-Earth
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King, George W., Wheatley, Peter J., Salz, Michael, Bourrier, Vincent, Czesla, Stefan, Ehrenreich, David, Kirk, James, Lecavelier des Etangs, Alain, Louden, Tom M., Schmitt, Jürgen and Schneider, P. Christian (2018) The XUV environments of exoplanets from Jupiter-size to super-Earth. Monthly Notices of the Royal Astronomical Society, 478 (1). pp. 1193-1208. doi:10.1093/mnras/sty1110 ISSN 0035-8711.
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WRAP-XU-environments-exoplanets-Jupiter-King-2018.pdf - Accepted Version - Requires a PDF viewer. Download (1663Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/sty1110
Abstract
Planets that reside close-in to their host star are subject to intense high-energy irradiation. Extreme-ultraviolet (EUV) and X-ray radiation (together, XUV) is thought to drive mass-loss from planets with volatile envelopes. We present XMM–Newton observations of six nearby stars hosting transiting planets in tight orbits (with orbital period, Porb < 10 d), wherein we characterize the XUV emission from the stars and subsequent irradiation levels at the planets. In order to reconstruct the unobservable EUV emission, we derive a new set of relations from Solar TIMED/SEE data that are applicable to the standard bands of the current generation of X-ray instruments. From our sample, WASP-80b and HD 149026b experience the highest irradiation level, but HAT-P-11b is probably the best candidate for Ly α evaporation investigations because of the system’s proximity to the Solar system. The four smallest planets have likely lost a greater percentage of their mass over their lives than their larger counterparts. We also detect the transit of WASP-80b in the near-ultraviolet with the optical monitor on XMM–Newton.
Item Type: | Journal Article | ||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Ultraviolet stars, Satellites, Stars -- Atmospheres | ||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||
Publisher: | Oxford University Press | ||||||||||||||||||
ISSN: | 0035-8711 | ||||||||||||||||||
Official Date: | 21 July 2018 | ||||||||||||||||||
Dates: |
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Volume: | 478 | ||||||||||||||||||
Number: | 1 | ||||||||||||||||||
Page Range: | pp. 1193-1208 | ||||||||||||||||||
DOI: | 10.1093/mnras/sty1110 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 12 July 2018 | ||||||||||||||||||
Date of first compliant Open Access: | 13 July 2018 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
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