期刊
SCIENCE ADVANCES
卷 6, 期 3, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aax7467
关键词
-
资金
- Progetto Premiale 2015 FRONTIERA funding scheme of the Italian Ministry of Education, University, and Research
- Italian Space Agency (ASI) [2014-025-R.1.2015]
- INAF
- Agenzia Spaziale Italiana (ASI) [2014-025-R.1.2015]
- UK STFC [ST/R006598/1]
- FONDECYT [1161218]
- CONICYT project Basal [AFB-170002]
- Spanish MINECO [AYA2016-79425-C3-3-P, AYA2017-84390-C2-1-R]
- State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award [SEV-2017-0709]
- Science and Technology Facilities Council/United Kingdom [ST/P000592/1]
- FEDER
- [ESP2017-87143R]
- [ESP2017-87676-C05-02-R]
- STFC [ST/M001008/1] Funding Source: UKRI
Our nearest neighbor, Proxima Centauri, hosts a temperate terrestrial planet. We detected in radial velocities evidence of a possible second planet with minimum mass m(c) sin i(c) = 5.8 +/- 1.9M(circle plus) and orbital period P-c = 5.21(-0.22)(+0.26) years. The analysis of photometric data and spectro-scopic activity diagnostics does not explain the signal in terms of a stellar activity cycle, but follow-up is required in the coming years for confirming its planetary origin. We show that the existence of the planet can be ascertained, and its true mass can be determined with high accuracy, by combining Gaia astrometry and radial velocities. Proxima c could become a prime target for follow-up and characterization with next-generation direct imaging instrumentation due to the large maximum angular separation of similar to 1 arc second from the parent star. The candidate planet represents a challenge for the models of super-Earth formation and evolution.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据