Orbital inclination and mass of the exoplanet candidate Proxima c

被引：27

作者：

Kervella, Pierre ^{[1
]}

Arenou, Frederic ^{[2
]}

Schneider, Jean ^{[3
]}

机构：

[1] Univ Paris Diderot, Univ PSL, Sorbonne Univ, Sorbonne Paris Cite,CNRS,LESIA,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France

[2] Univ PSL, Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, F-92195 Meudon, France

[3] Univ PSL, Observ Paris, LUTH, 5 Pl Jules Janssen, F-92195 Meudon, France

来源：

ASTRONOMY & ASTROPHYSICS | 2020年 / 635卷

关键词：

astrometry; planetary systems; planets and satellites: individual: Proxima c; proper motions; celestial mechanics; planets and satellites: fundamental parameters;

D O I：

10.1051/0004-6361/202037551

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the orbital parameters of the recently discovered exoplanet candidate Proxima c using a combination of its spectroscopic orbital parameters and Gaia DR2 astrometric proper motion anomaly. We obtain an orbital inclination of i=152 +/- 14 deg, corresponding to a planet mass of textual-form specific-use="web-only" m(c) = 12(-5)(+12)M(circle plus)</textual-form> m c = 12 - 5 + 12 mml:msubsup mml:mspace width="0.166667em"mml:mspace mml:msub M circle plus comparable to Uranus and Neptune. While the derived orbital parameters are too uncertain to accurately predict the position of the planet for a given epoch, we present a map of its probability of presence relative to its parent star in the coming years.

引用

页数：4

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