Holmström et al. reply

M. Holmström, A. Ekenbäck, F. Selsis, T. Penz, H. Lammer and P. Wurz
Additional contact information
M. Holmström: * Swedish Institute of Space Physics, PO Box 812, SE-98128 Kiruna, Sweden. matsh@irf.se
A. Ekenbäck: * Swedish Institute of Space Physics, PO Box 812, SE-98128 Kiruna, Sweden. matsh@irf.se
F. Selsis: † Laboratoire d’Astrophysique de Bordeaux (CNRS, Université Bordeaux 1), BP 89, F-33270 Floirac, France
T. Penz: § INAF—Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134 Palermo, Italy
H. Lammer: ‖ Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
P. Wurz: ¶ Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland

Nature, 2008, vol. 456, issue 7219, E1-E2

Abstract: Abstract Replying to: A. Lecavelier des Etangs, A. Vidal-Madjar & J.-M. Désert Nature 456, 10.1038/nature07402 (2008) Lecavelier des Etangs et al.1 object to the conclusion by Holmström et al.2 that radiation pressure alone cannot explain the Lyman-α absorption observed3 during transits of HD 209458b. We agree that hydrogen atoms can be accelerated to large velocities by radiation pressure. However, with our model we cannot reproduce the observed spectrum, as shown in the Supplementary Information and Fig. 3 of ref. 2.

Date: 2008
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DOI: 10.1038/nature07403

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