Tracking Advanced Planetary Systems (TAPAS) with HARPS-N: III. HD 5583 and BD+15 2375 - Two cool giants with warm companions
Entidad
UAM. Departamento de Física TeóricaEditor
EDP SciencesFecha de edición
2016-01-19Cita
10.1051/0004-6361/201527869
Astronomy and Astrophysics 588 (2016): A62
ISSN
1432-0746 (online); 0004-6361 (print)DOI
10.1051/0004-6361/201527869Financiado por
A.N., MoA, G.N., B.D., and MiA were supported by the Polish National Science Centre Grant UMO-2012/07/B/ST9/04415. MoA also acknowledges the Mobility+III fellowship from the Polish Ministry of Science and Higher Education. K.K. was funded in part by the Gordon and Betty Moore Foundation’s Data-Driven Discovery Initiative through Grant GBMF4561.E.V. work was supported by the Spanish Ministerio de Ciencia e Innovacion (MICINN), Plan Nacional de Astronomia y Astrofisica, under Grant AYA2013-45347P. A.W. was supported by the NASA Grant NNX09AB36G.The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant ConsortiumProyecto
Gobierno de España. AYA2013-45347PVersión del editor
http://dx.doi.org/10.1051/0004-6361/201527869Materias
Planet-star interactions; Planets and satellites: individual: BD+15 2375; Planets and satellites: individual: HD 5583; Stars: evolution; Stars: late-type; FísicaDerechos
© 2016 ESOResumen
Context. Evolved stars are crucial pieces for our understanding of the dependency of the planet formation mechanism on the stellar mass and for exploring the mechanism involved in star-planet interactions more deeply. Over the last ten years, we have monitored about 1000 evolved stars for radial velocity variations in the search for low-mass companions under the Penn State - Torun Centre for Astronomy Planet Search program with the Hobby-Eberly Telescope (HET). Selected prospective candidates that required higher RV precision measurements were followed with HARPS-N at the 3.6 m Telescopio Nazionale Galileo under the TAPAS project. Aims. We aim to detect planetary systems around evolved stars to be able to build sound statistics on the frequency and intrinsic nature of these systems, and to deliver in-depth studies of selected planetary systems with evidence of star-planet interaction processes. Methods. For HD 5583 we obtained 14 epochs of precise RV measurements that were collected over 2313 days with the HET, and 22 epochs of ultra-precise HARPS-N data collected over 976 days. For BD+15 2375 we collected 24 epochs of HET data over 3286 days and 25 epochs of HARPS-S data over 902 days. Results. We report the discovery of two planetary mass objects that are orbiting two evolved red giant stars: HD 5583 has a msini = 5.78MJ companion at 0.529 AU in a nearly circular orbit (e = 0.076), the closest companion to a giant star detected with the RV technique, and BD+15 2735 that, with a msini = 1.06MJ, holds the record for the lightest planet orbiting an evolved star found so far (in a circular e = 0.001, 0.576 AU orbit). These are the third and fourth planets found within the TAPAS project, a HARPS-N monitoring of evolved planetary systems identified with the HET
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Google Scholar:Niedzielski, A.
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Villaver Sobrino, Eva Gloria
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Nowak, G.
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Adamów, M.
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Kowalik, K.
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Wolszczan, A.
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Deka-Szymankiewicz, B.
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Adamczyk, M.
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Maciejewski, G.
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