The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS

D. Ehrenreich; A. Lecavelier Des Etangs; G. Hébrard; J. M. Désert; A. Vidal-Madjar; J. C. McConnell; C. D. Parkinson; G. E. Ballester; R. Ferlet

doi:10.1017/S1743921308027129

The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS

D. Ehrenreich, A. Lecavelier Des Etangs, G. Hébrard, J. M. Désert, A. Vidal-Madjar, J. C. McConnell, C. D. Parkinson, G. E. Ballester, R. Ferlet

Lunar and Planetary Lab

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Exospheric atomic hydrogen escaping from the planet HD 209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. We present observations of this transiting planet's extended exosphere with the Advanced Camera for Surveys on board the Hubble Space Telescope. From the two transit light curves obtained at Lyman α, we find an in-transit absorption of (8.0±5.7)%, in good agreement with previous studies. These new constraints on the size of the exosphere strengthens the evaporation scenario. Full details are provided in Ehrenreich et al. (2008).

Original language	English (US)
Pages (from-to)	528-531
Number of pages	4
Journal	Proceedings of the International Astronomical Union
Volume	4
Issue number	S253
DOIs	https://doi.org/10.1017/S1743921308027129
State	Published - May 2008

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS",

abstract = "Exospheric atomic hydrogen escaping from the planet HD 209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. We present observations of this transiting planet's extended exosphere with the Advanced Camera for Surveys on board the Hubble Space Telescope. From the two transit light curves obtained at Lyman α, we find an in-transit absorption of (8.0±5.7)%, in good agreement with previous studies. These new constraints on the size of the exosphere strengthens the evaporation scenario. Full details are provided in Ehrenreich et al. (2008).",

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year = "2008",

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language = "English (US)",

volume = "4",

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TY - JOUR

T1 - The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS

AU - Ehrenreich, D.

AU - Lecavelier Des Etangs, A.

AU - Hébrard, G.

AU - Désert, J. M.

AU - Vidal-Madjar, A.

AU - McConnell, J. C.

AU - Parkinson, C. D.

AU - Ballester, G. E.

AU - Ferlet, R.

PY - 2008/5

Y1 - 2008/5

N2 - Exospheric atomic hydrogen escaping from the planet HD 209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. We present observations of this transiting planet's extended exosphere with the Advanced Camera for Surveys on board the Hubble Space Telescope. From the two transit light curves obtained at Lyman α, we find an in-transit absorption of (8.0±5.7)%, in good agreement with previous studies. These new constraints on the size of the exosphere strengthens the evaporation scenario. Full details are provided in Ehrenreich et al. (2008).

AB - Exospheric atomic hydrogen escaping from the planet HD 209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. We present observations of this transiting planet's extended exosphere with the Advanced Camera for Surveys on board the Hubble Space Telescope. From the two transit light curves obtained at Lyman α, we find an in-transit absorption of (8.0±5.7)%, in good agreement with previous studies. These new constraints on the size of the exosphere strengthens the evaporation scenario. Full details are provided in Ehrenreich et al. (2008).

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The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS

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