The HARPS search for southern extra-solar planets

VII. A very hot Jupiter orbiting HD 212301

¹ European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: glocurto@eso.org
² Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
³ Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
⁴ Physikalisches Institut Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
⁵ Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, 13376 Marseille 12, France
⁶ Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal
⁷ Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, 414 rue de la Piscine, 38041 Grenoble Cedex 9, France
⁸ Laboratoire d'Astrophysique UMR 5572, Observatoire Midi-Pyrénées, 14 Av. E. Belin, 31400 Toulouse, France

Received: 21 August 2005
Accepted: 25 January 2006

Abstract

We report the discovery of a planetary companion orbiting the F8V star HD 212301. This is the first “very hot Jupiter” discovered by a radial velocity survey. The detection was made possible by the HARPS spectrograph installed at the ESO 3.6 m telescope in Cerro La Silla, Chile. The data were carefully analyzed to exclude activity induced effects on the measured radial velocities. Although no transit has been detected, radial velocity oscillations are best explained with a planet of mass orbiting the star at 0.036  AU with a period of 2.246 days.