Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
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对土星质量系外行星 WASP-69b 中扩展氦大气层的地面探测
DOI：
10.1126/science.aat5348
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发表时间：
2018-12
期刊：
影响因子：
56.9
通讯作者：
Bauer Flori
中科院分区：
文献类型：
--
作者：
Nortmann Lisa;Palle Enric;Salz Michael;Sanz-Forcada Jorge;Nagel Evangelos;Alonso-Floriano F. Javier;Czesla Stefan;Yan Fei;Chen Guo;Snellen Ignas A. G.;Zechmeister Mathias;Schmitt Jürgen H. M. M.;Lopez-Puertas Manuel;Casasayas-Barris Nuria;Bauer Flori
Helium escaping from hot gas giants Many gas giant exoplanets orbit so close to their host star that they are heated to high temperatures, causing atmospheric gases to escape. Gas giant atmospheres are mostly hydrogen and helium, which are difficult to observe. Two papers have now observed escaping helium in the near-infrared (see the Perspective by Brogi). Allart et al. observed helium in a Neptune-mass exoplanet and performed detailed simulations of its atmosphere, which put constraints on the escape rate. Nortmann et al. found that helium is escaping a Saturn-mass planet, trailing behind it in its orbit. They combined this with observations of several other exoplanets to show that atmospheres are being lost more quickly by exoplanets that are more strongly heated. Science, this issue p. 1384, p. 1388; see also p. 1360 Observations of helium show that the atmosphere of a hot Saturn-mass exoplanet is escaping and trailing behind the planet. Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, and these losses can affect their physical and chemical evolution. Studies of atmospheric escape from exoplanets have mostly relied on space-based observations of the hydrogen Lyman-α line in the far ultraviolet region, which is strongly affected by interstellar absorption. Using ground-based high-resolution spectroscopy, we detected excess absorption in the helium triplet at 1083 nanometers during the transit of the Saturn-mass exoplanet WASP-69b, at a signal-to-noise ratio of 18. We measured line blueshifts of several kilometers per second and posttransit absorption, which we interpret as the escape of part of the atmosphere trailing behind the planet in comet-like form.
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DOI：
10.1051/0004-6361/201731483
发表时间：
2017-10
期刊：
arXiv: Instrumentation and Methods for Astrophysics
影响因子：
--
作者：
M. Zechmeister;A. Reiners;P. Amado;M. Azzaro;F. Bauer;V. B'ejar;J. A. Caballero;E. Guenther;H. Hagen;S. Jeffers;A. Kaminski;M. Kürster;R. Launhardt;D. Montes;J. C. Morales;A. Quirrenbach;S. Reffert;I. Ribas;W. Seifert;L. Tal-Or;V. Wolthoff
通讯作者：
M. Zechmeister;A. Reiners;P. Amado;M. Azzaro;F. Bauer;V. B'ejar;J. A. Caballero;E. Guenther;H. Hagen;S. Jeffers;A. Kaminski;M. Kürster;R. Launhardt;D. Montes;J. C. Morales;A. Quirrenbach;S. Reffert;I. Ribas;W. Seifert;L. Tal-Or;V. Wolthoff
影响因子：
64.8
作者：
D. Sing;J. Fortney;N. Nikolov;H. Wakeford;T. Kataria;T. Evans;S. Aigrain;G. Ballester;A. Burrows;D. Deming;J. Désert;N. Gibson;G. Henry;C. Huitson;H. Knutson;A. D. Étangs;F. Pont;A. Showman;A. Vidal-Madjar;M. Williamson;P. Wilson
通讯作者：
D. Sing;J. Fortney;N. Nikolov;H. Wakeford;T. Kataria;T. Evans;S. Aigrain;G. Ballester;A. Burrows;D. Deming;J. Désert;N. Gibson;G. Henry;C. Huitson;H. Knutson;A. D. Étangs;F. Pont;A. Showman;A. Vidal-Madjar;M. Williamson;P. Wilson
DOI：
--
发表时间：
1982-02
期刊：
--
影响因子：
--
作者：
P. Eggleton
通讯作者：
P. Eggleton
影响因子：
6.5
作者：
F. Bouchy;S. Udry;M. Mayor;C. Moutou;F. Pont;Nicolas Iribarne;Ronaldo da Silva;S. Ilovaisky;D. Queloz;N. Santos;D. Ségransan;S. Zucker
通讯作者：
F. Bouchy;S. Udry;M. Mayor;C. Moutou;F. Pont;Nicolas Iribarne;Ronaldo da Silva;S. Ilovaisky;D. Queloz;N. Santos;D. Ségransan;S. Zucker
影响因子：
64.8
作者：
A. Vidal-Madjar;A. D. Étangs;J. Désert;G. Ballester;R. Ferlet;G. Hébrard;M. Mayor
通讯作者：
A. Vidal-Madjar;A. D. Étangs;J. Désert;G. Ballester;R. Ferlet;G. Hébrard;M. Mayor