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TW Hya under CRIRES light: evidence against the presence of a hot Jupiter

Published online by Cambridge University Press:  19 April 2010

K. Goździewski ,
A. Niedzielski ,
J. Schneider ,
P. Figueira ,
F. Pepe ,
N. C. Santos ,
C. H.F. Melo ,
X. Bonfils ,
N. Huélamo  and
S. Udry
...Show all authors
P. Figueira
Affiliation:
Observatoire Astronomique de l'Université de Genève, 1290-Sauverny, Switzerland
F. Pepe
Affiliation:
Observatoire Astronomique de l'Université de Genève, 1290-Sauverny, Switzerland
N. C. Santos
Affiliation:
Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
C. H.F. Melo
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany
X. Bonfils
Affiliation:
Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal Centro de Astronomia e Astrofísica da Universidade de Lisboa, OAL, Tapada da Ajuda, 1349-018 Lisboa, Portugal
N. Huélamo
Affiliation:
Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF-INTA), Apdo. 78, 28691 Villanueva de la Cañada, Spain
S. Udry
Affiliation:
Observatoire Astronomique de l'Université de Genève, 1290-Sauverny, Switzerland
D. Queloz
Affiliation:
Observatoire Astronomique de l'Université de Genève, 1290-Sauverny, Switzerland
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Abstract

High-precision radial velocity measurements have suffered from stellar spots effects for more than one decade. With the advent of high-resolution infra-red spectrographs, one is allowed to move into a new spectral domain where the influence of these stellar phenomena on measurements is significantly reduced. 
We present the first results of our CRIRES campaign on TW Hya, around which a periodic optical radial velocity variation was found and attributed to a planet. Our work showed that the signal is not present in the infra-red, pointing to a cold spot instead of to a planet as the explanation for the different data sets. This campaign demonstrates the power of this new approach and shows that CRIRES can deliver high-precision radial velocity measurements.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 42: Extrasolar Planets in Multi-Body Systems: Theory and Observations , 2010 , pp. 125 - 129
Copyright
© EAS, EDP Sciences, 2010

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