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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

Title
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
Year
2013
Authors
Lo Curto, G
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Mayor, M
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Benz, W
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Bouchy, F
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Hebrard, G
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Lovis, C
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Moutou, C
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Naef, D
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Pepe, F
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Queloz, D
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N.C. Santos
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Segransan, D
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Udry, S
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Journal
Vol. 551
Final page: A59
ISSN: 0004-6361
Publisher: EDP Sciences
Other information
Authenticus ID: P-005-2RB
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
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