The HARPS search for southern extra-solar planets XXXVII. Five new long-period giant planets and a system update

Moutou, C.; Lo Curto, G.; Mayor, M.; Bouchy, F.; Benz, Willy; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Segransan, D.; Sousa, S. G.; Udry, S. (2015). The HARPS search for southern extra-solar planets XXXVII. Five new long-period giant planets and a system update. Astronomy and astrophysics, 576(A48), A48. EDP Sciences 10.1051/0004-6361/201424965

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We describe radial-velocity time series obtained by HARPS on the 3.60 m telescope in La Silla (ESO, Chile) over ten years and report the discovery of five new giant exoplanets in distant orbits; these new planets orbit the stars HD 564, HD 30669, HD 108341, and BD -114672. Their periods range from 492 to 1684 days, semi-major axes range from 1.2 to 2.69 AU, and eccentricities range from 0 to 0.85. Their minimum mass ranges from 0.33 to 3.5 MJup. We also refine the parameters of two planets announced previously around HD 113538, based on a longer series of measurements. The planets have a period of 663 ± 8 and 1818 ± 25 days, orbital eccentricities of 0.14 ± 0.08 and 0.20 ± 0.04, and minimum masses of 0.36 ± 0.04 and 0.93 ± 0.06 MJup. Finally, we report the discovery of a new hot-Jupiter planet around an active star, HD 103720; the planet has a period of 4.5557 ± 0.0001 days and a minimum mass of 0.62 ± 0.025 MJup. We discuss the fundamental parameters of these systems and limitations due to stellar activity in quiet stars with typical 2 m s-1 radial velocity precision.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS)
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Benz, Willy

Subjects:

500 Science > 530 Physics

ISSN:

0004-6361

Publisher:

EDP Sciences

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

13 Jun 2016 17:28

Last Modified:

02 Sep 2016 12:02

Publisher DOI:

10.1051/0004-6361/201424965

Web of Science ID:

000351877600048

ArXiv ID:

1412.6591

BORIS DOI:

10.7892/boris.81689

URI:

https://boris.unibe.ch/id/eprint/81689

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