The HARPS search for southern extra-solar planets XXXII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone

• Type: Article in International Scientific Journal
• Date: 2013

Authors

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

Journal

Title: Astronomy and Astrophysics

Vol. 551

Final page: A59

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 20 Citations

Scopus - 24 Citations

Other information

Authenticus ID: P-005-2RB

DOI: 10.1051/0004-6361/201220415

Abstract (EN): The vast diversity of planetary systems detected to date is defying our capability of understanding their formation and evolution. Well-defined volume-limited surveys are the best tool at our disposal to tackle the problem, via the acquisition of robust statistics of the orbital elements. We are using the HARPS spectrograph to conduct our survey of approximate to 850 nearby solar-type stars, and in the course of the past nine years we have monitored the radial velocity of HD 103774, HD 109271, and BD-061339. In this work we present the detection of five planets orbiting these stars, with m sin (i) between 0.6 and 7 Neptune masses, four of which are in two multiple systems, comprising one super-Earth and one planet within the habitable zone of a late-type dwarf. Although for strategic reasons we chose efficiency over precision in this survey, we have the capability to detect planets down to the Neptune and super-Earth mass range as well as multiple systems, provided that enough data points are made available.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7