Spectroscopic parameters for 451 stars in the HARPS GTO planet search program: Stellar [Fe/H] and the frequency of exo-Neptunes

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

Authors

Sousa, SG (Author) FCUP; Santos, NC (Author) FCUP; Mayor, M (Author) Other; Udry, S (Author) Other; Casagrande, L (Author) Other; Israelian, G (Author) Other; Pepe, F (Author) Other; Queloz, D (Author) Other; Monteiro, MJPFG (Author) FCUP

Journal

Title: AIP Conference Proceedings

Vol. 094 No. (4)

Pages: 477- -480

ISSN: 0094-243X

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 0 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-003-PHT

DOI: 10.1063/1.3099152

Abstract (EN): We present a catalogue with accurate stellar parameters for the 451 stars that compose the HARPS Guaranteed Time Observations (GTO) "high precision" sample. We use our results, together with the others found in the literature, to study the metallicity-planet correlation, namely for very low mass planets. The results presented here suggests that contrarily to their jovian couterparts, neptune-like planets do not form preferentially around metal-rich stars. The ratio of jupiter-to-neptunes is also an increasing function of stellar metallicity. These results are discussed in the context or the core-accretion model for planet formation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4