The HARPS search for southern extra-solar planets XLIV. Eight HARPS multi-planet systems hosting 20 super-Earth and Neptune-mass companions

被引：51

作者：

Udry, S. ^{[1
]}

Dumusque, X. ^{[1
]}

Lovis, C. ^{[1
]}

Segransan, D. ^{[1
]}

Diaz, R. F. ^{[1
]}

Benz, W. ^{[2
]}

Bouchy, F. ^{[1
,3
]}

Coffinet, A. ^{[1
]}

Lo Curto, G. ^{[4
]}

Mayor, M. ^{[1
]}

Mordasini, C. ^{[2
]}

Motalebi, F. ^{[1
]}

Pepe, F. ^{[1
]}

Queloz, D. ^{[1
]}

Santos, N. C. ^{[5
,6
]}

Wyttenbach, A. ^{[1
]}

Alonso, R. ^{[7
]}

Cameron, A. Collier ^{[8
]}

Deleuil, M. ^{[3
]}

Figueira, P. ^{[5
]}

Gillon, M. ^{[9
]}

Moutou, C. ^{[3
,10
]}

Pollacco, D. ^{[11
]}

Pompei, E. ^{[4
]}

机构：

[1] Univ Geneva, Observ Astron, 51 Ch Maillettes, CH-1290 Versoix, Switzerland

[2] Univ Bern, Phys Inst, Silderstr 5, CH-3012 Bern, Switzerland

[3] Aix Marseille Univ, LAM, CNRS, UMR 7326, F-13388 Marseille, France

[4] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[5] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal

[6] Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre, P-4169007 Porto, Portugal

[7] Inst Astrofis Canarias, Tenerife 38025, Spain

[8] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[9] Univ Liege, Inst Astrophys & Geophys, Allee 6 Aout 17,Bat B5C, B-4000 Liege, Belgium

[10] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA

[11] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

ASTRONOMY & ASTROPHYSICS | 2019年 / 622卷

基金：

瑞士国家科学基金会;

关键词：

planetary systems; techniques: radial velocities; techniques: spectroscopic; methods: data analysis; stars: general; CORALIE SURVEY; SHORT-PERIOD; FLUX MEASUREMENTS; VELOCITY; PERTURBATIONS; SPECTROGRAPH; VALIDATION; EXOPLANET; ROTATION; STARS;

D O I：

10.1051/0004-6361/201731173

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. We present radial-velocity measurements of eight stars observed with the HARPS Echelle spectrograph mounted on the 3.6-m telescope in La Silla (ESO, Chile). Data span more than ten years and highlight the long-term stability of the instrument. Aims. We search for potential planets orbiting HD20003, HD20781, HD21693, HD31527, HD45184, HD51608, HD134060 and HD136352 to increase the number of known planetary systems and thus better constrain exoplanet statistics. Methods. After a preliminary phase looking for signals using generalized Lomb-Scargle periodograms, we perform a careful analysis of all signals to separate bona-fide planets from signals induced by stellar activity and instrumental systematics. We finally secure the detection of all planets using the efficient MCMC available on the Data and Analysis Center for Exoplanets (DACE web-platform), using model comparison whenever necessary. Results. In total, we report the detection of twenty new super-Earth to Neptune-mass planets, with minimum masses ranging from 2 to 30 M-Earth and periods ranging from 3 to 1300 days, in multiple systems with two to four planets. Adding CORALIE and HARPS measurements of HD20782 to the already published data, we also improve the characterization of the extremely eccentric Jupiter orbiting this visual companion of HD20781.

引用

页数：29

共 25 条

[21] Characterization of the L 98-59 multi-planetary system with HARPS Mass characterization of a hot super-Earth, a sub-Neptune, and a mass upper limit on the third planet
Cloutier, R.
Astudillo-Defru, N.
Bonfils, X.
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Lovis, C.
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Vezie, M.
Villasenor, J.
ASTRONOMY & ASTROPHYSICS, 2019, 629
[22] The HARPS search for southern extra-solar planets -: X.: A msin i=11 M⊕ planet around the nearby spotted M dwarf GJ 674
Bonfils, X.
Mayor, M.
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Forveille, T.
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Udry, S.
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Lovis, C.
Pepe, F.
Queloz, D.
Santos, N. C.
Bertaux, J.-L.
ASTRONOMY & ASTROPHYSICS, 2007, 474 (01) : 293 - 299
[23] The HARPS search for southern extra-solar planets XXX. Planetary systems around stars with solar-like magnetic cycles and short-term activity variation
Dumusque, X.
Lovis, C.
Segransan, D.
Mayor, M.
Udry, S.
Benz, W.
Bouchy, F.
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Mordasini, C.
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Queloz, D.
Santos, N. C.
Naef, D.
ASTRONOMY & ASTROPHYSICS, 2011, 535
[24] The HARPS search for southern extra-solar planets XLVI. 12 super-Earths around the solar type stars HD 39194, HD 93385, HD 96700, HD 154088, and HD 189567
Unger, N.
Segransan, D.
Queloz, D.
Udry, S.
Lovis, C.
Mordasini, C.
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Bouchy, F.
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Dumusque, X.
Lo Curto, G.
Marmier, M.
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Pepe, F.
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Alonso, R.
Cameron, A. Collier
Deleuil, M.
Figueira, P.
Gillon, M.
Moutou, C.
Pollacco, D.
Pompei, E.
ASTRONOMY & ASTROPHYSICS, 2021, 654 (654)
[25] The HARPS search for southern extra-solar planets XXXIII. Super-Earths around the M-dwarf neighbors Gl 433 and Gl 667C
Delfosse, X.
Bonfils, X.
Forveille, T.
Udry, S.
Mayor, M.
Bouchy, F.
Gillon, M.
Lovis, C.
Neves, V.
Pepe, F.
Perrier, C.
Queloz, D.
Santos, N. C.
Segransan, D.
ASTRONOMY & ASTROPHYSICS, 2013, 553

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