The CORALIE survey for southern extrasolar planets. XIV. HD 142022 b: a long-period planetary companion in a wide binary
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Laboratoire d'Astrophysique de Grenoble (LAOG)Centre National de la Recherche Scientifique (CNRS) - INSU - Observatoire des Sciences de l'Univers de Grenoble (OSUG)
Université Joseph Fourier (UJF) - INSU - Centre National de la Recherche Scientifique (CNRS) - Université Joseph Fourier (UJF) - Centre National de la Recherche Scientifique (CNRS)
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https://hal.archives-ouvertes.fr/hal-00398274Abstract
International audienceWe report precise Doppler measurements of HD 142022 obtained during the past six years with the CORALIE echelle spectrograph at La Silla Observatory together with a few additional observations made recently with the HARPS echelle spectrograph. Our radial velocities reveal evidence of a planetary companion with an orbital period P=1928+53-39 days, an eccentricity e=0.53+0.23-0.18, and a velocity semiamplitude K=92+102-29 m s-1. The inferred companion minimum mass is M_2 sin{i}=5.1+2.6-1.5 {M}_Jup and the semimajor axis a=3.03 ± 0.05 AU. Only one full orbital revolution has been monitored yet, and the periastron passage could not be observed since the star was too low on the horizon. The eccentricity and velocity semiamplitude remain therefore quite uncertain and the orbital solution is preliminary. HD 142022 is a chromospherically inactive K0 dwarf, metal rich relative to the Sun, and is the primary component of a wide binary. HD 142022 b is thus a new "planet in binary" candidate, and its high eccentricity might be due to secular interactions with the distant stellar companion.
Date
2006Type
info:eu-repo/semantics/articleIdentifier
oai:HAL:hal-00398274v1hal-00398274
https://hal.archives-ouvertes.fr/hal-00398274
DOI : 10.1051/0004-6361:20053720
DOI
: 10.1051/0004-6361:20053720ae974a485f413a2113503eed53cd6c53
: 10.1051/0004-6361:20053720