The HARPS search for southern extra-solar planets XV. Six long-period giant planets around BD-17 0063, HD 20868, HD 73267, HD 131664, HD 145377, and HD 153950

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Moutou, C (Author) Other; Mayor, M (Author) Other; Lo Curto, G (Author) Other; Udry, S (Author) Other; Bouchy, F (Author) Other; Benz, W (Author) Other; Lovis, C (Author) Other; Naef, D (Author) Other; Pepe, F (Author) Other; Queloz, D (Author) Other; N.C. Santos (Author) FCUP

Journal

Title: Astronomy and Astrophysics

Vol. 496

Pages: 513-519

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 34 Citations

Scopus - 35 Citations

Other information

Authenticus ID: P-003-MMK

DOI: 10.1051/0004-6361:200810941

Abstract (EN): We report the discovery of six new substellar companions of main-sequence stars, detected by multiple Doppler measurements with the instrument HARPS installed on the ESO 3.6 m telescope, La Silla, Chile. These extrasolar planets orbit the stars BD-17 0063, HD 20868, HD 73267, HD 131664, HD 145377, and HD 153950. The orbital characteristics that reproduce the observed data are presented, as well as the stellar and planetary parameters. Masses of the companions range from 2 to 18 Jupiter masses, and periods range from 100 to 2000 days. The observational data are carefully analysed for activity-induced effects, and we conclude that the observed radial velocity variations are of exoplanetary origin. Of particular interest is the very massive planet (or brown-dwarf companion) orbiting the metal-rich HD 131664 with m(2) sin i = 18.15 M(Jup) and a 5.34-year orbital period. These new discoveries are consistent with the observed statistical properties of exoplanet samples known so far.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7