The origin of hydrogen around HD 209458b

A. Lecavelier des Etangs, A. Vidal-Madjar and J.-M. Désert
Additional contact information
A. Lecavelier des Etangs: * CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
A. Vidal-Madjar: * CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
J.-M. Désert: * CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France

Nature, 2008, vol. 456, issue 7219, E1-E1

Abstract: Abstract Arising from: M. Holmström et al. Nature 451, 970–972 (2008)10.1038/nature06600 ; Holmström et al. reply Using numerical simulation, Holmström et al.1 proposed a plausible alternative explanation of the observed Lyman-α absorption that was seen during the transit of HD 209458b (ref. 2). They conclude that radiation pressure alone cannot explain the observations and that a peculiar stellar wind is needed. Here we show that radiation pressure alone can in fact produce the observed high-velocity hydrogen atoms. We also emphasize that even if the stellar wind is responsible for the observed hydrogen, to have a sufficient number of atoms for charge exchange with stellar wind, the energetic neutral atom (ENA) model also needs a significant escape from the planet atmosphere of similar amplitude as quoted in ref. 2.

Date: 2008
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/nature07402 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:456:y:2008:i:7219:d:10.1038_nature07402

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/nature07402

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().