Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion
Article
Article Title | Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion |
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ERA Journal ID | 1050 |
Article Category | Article |
Authors | Hernan-Obispo, M. (Author), Tuomi, M. (Author), Galvez-Ortiz, M. C. (Author), Golovin, A. (Author), Barnes, J. R. (Author), Jones, H. R. A. (Author), Kane, S. R. (Author), Pinfield, D. (Author), Jenkins, J. S. (Author), Petit, P. (Author), Anglada-Escude, G. (Author), Marsden, S. C. (Author), Catalan, S. (Author), Jeffers, S. V. (Author), de Castro, E. (Author), Cornide, M. (Author), Garces, A. (Author), Jones, M. I. (Author), Gorlova, N. (Author) and Andreev, M. (Author) |
Journal Title | Astronomy and Astrophysics: a European journal |
Journal Citation | 576 (A66) |
Number of Pages | 16 |
Year | 2015 |
Publisher | EDP Sciences |
Place of Publication | France |
ISSN | 0004-6361 |
1432-0746 | |
Digital Object Identifier (DOI) | https://doi.org/10.1051/0004-6361/201219095 |
Web Address (URL) | http://www.aanda.org/articles/aa/abs/2015/04/aa19095-12/aa19095-12.html |
Abstract | Context. In a previous paper we reported a planetary companion to the young and very active K5Ve star BD+20 1790. We found that this star has a high level of stellar activity (log Rprime_HK =-3.7) that manifests in a plethora of phenomena (starspots, prominences, plages, large flares). Based on a careful study of these activity features and a deep discussion and analysis of the effects of the stellar activity on the radial velocity measurements, we demonstrated that the presence of a planet provided the best explanation for the radial velocity variations and all the peculiarities of this star. The orbital solution resulted in a close-in massive planet with a period of 7.78 days. However, a paper by Figueira et al. (2010, A&A, 513, L8) questioned the evidence for the planetary companion. |
Keywords | methods: statistical; techniques: radial velocities; stars: activity; planetary systems; stars: individual: BD+20 1790 |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Complutense University of Madrid, Spain |
University of Hertfordshire, United Kingdom | |
Spanish Astrobiology Centre, Spain | |
National Academy of Sciences of Ukraine | |
Open University, United Kingdom | |
San Francisco State University, United States | |
University of Chile, Chile | |
University of Toulouse, France | |
Georg August University of Gottingen, Germany | |
Computational Engineering and Science Research Centre | |
University of Warwick, United Kingdom | |
University of Gottingen, Germany | |
Institute of Space Sciences, Spain | |
Pontifical Catholic University of Chile, Chile | |
Catholic University of Leuven, Belgium | |
Russian Academy of Sciences, Russia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q34w4/analysis-of-combined-radial-velocities-and-activity-of-bd-20-1790-evidence-supporting-the-existence-of-a-planetary-companion
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