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

LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
Institut d’Astrophysique de Paris
York University
University of Michigan, Ann Arbor
University of Arizona

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

1 Citation (Scopus)

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
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
Publication status	Published - 1 May 2008
Externally published	Yes

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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).",

author = "D. Ehrenreich and \{Lecavelier Des Etangs\}, A. and G. H{\'e}brard and D{\'e}sert, \{J. M.\} and A. Vidal-Madjar and McConnell, \{J. C.\} and Parkinson, \{C. D.\} and Ballester, \{G. E.\} and R. Ferlet",

year = "2008",

month = may,

day = "1",

doi = "10.1017/S1743921308027129",

language = "English",

volume = "4",

pages = "528--531",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S253",

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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 - 2008/5/1

Y1 - 2008/5/1

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).

U2 - 10.1017/S1743921308027129

DO - 10.1017/S1743921308027129

M3 - Article

AN - SCOPUS:84884942070

SN - 1743-9213

VL - 4

SP - 528

EP - 531

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S253

ER -

The hydrogen exosphere of exoplanet HD209458b detected with HST/ACS

Abstract

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