BD+48 740-Li overabundant giant star with a planet: A case of recent engulfment?

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Show simple item record Adamów, Monika Niedźwiecki, Andrzej Villaver, Eva Nowak, G. Wolszczan, Alex
dc.contributor.other UAM. Departamento de Física Teórica es_ES 2014-09-29T13:39:23Z 2014-09-29T13:39:23Z 2012-07-20
dc.identifier.citation The Astrophysical Journal Letters 754.1 (2012): L15 en_US
dc.identifier.issn 2041-8205 (print) es_ES
dc.identifier.issn 2041-8213 (online) es_ES
dc.description The Astrophysical Journal Letters 754.1 (2012): L15 reproduced by permission of the AAS en_US
dc.description.abstract We report the discovery of a unique object, BD+48 740, a lithium overabundant giant with A(Li) = 2.33 ± 0.04 (where A(Li) = log n Li/n H + 12), that exhibits radial velocity (RV) variations consistent with a 1.6 MJ companion in a highly eccentric, e = 0.67 ± 0.17, and extended, a = 1.89AU (P = 771days), orbit. The high eccentricity of the planet is uncommon among planetary systems orbiting evolved stars and so is the high lithium abundance in a giant star. The ingestion by the star of a putative second planet in the system originally in a closer orbit could possibly allow for a single explanation to these two exceptional facts. If the planet candidate is confirmed by future RV observations, it might represent the first example of the remnant of a multiple planetary system recently affected by stellar evolution en_US
dc.description.sponsorship We thank Dr. Nikolai Piskunov for making SME available for us.We thank the HET resident astronomers and telescope operators for continuous support. M.A., A.N., and G.N. were supported by the Polish Ministry of Science and Higher Education grant N N203 510938. A.W. was supported by the NASA grant NNX09AB36G. E.V. acknowledges the support provided by the Spanish Ministry of Science and Innovation (MICINN) under grant AYA2010-20630 and to the Marie Curie FP7-People- RG268111. The HET is a joint project of theUniversity of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universit¨atM¨unchen, and Georg-August-Universität Göttingen. The HET is named in honor of its principal benefactors, William P. Hobby and Robert E. Eberly. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. This research has made extensive use of the SIMBAD database, operated at CDS (Strasbourg, France) and NASA’s Astrophysics Data System Bibliographic Services. This research has made use of the Exoplanet Orbit Database and the Exoplanet Data Explorer at en_US
dc.format.extent 5 pag. es_ES
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher The American Astronomical Society en_US
dc.relation.ispartof The Astrophysical Journal Letters en_US
dc.rights © 2012. The American Astronomical Society. All rights reserved en_US
dc.subject.other Planet-star interactions en_US
dc.subject.other Stars: atmospheres en_US
dc.subject.other Stars: fundamental parameters en_US
dc.subject.other Stars: individual (BD+48 740) en_US
dc.subject.other Stars: late-type en_US
dc.subject.other Planets and satellites en_US
dc.title BD+48 740-Li overabundant giant star with a planet: A case of recent engulfment? en_US
dc.type article en
dc.subject.eciencia Física es_ES
dc.relation.publisherversion es_ES
dc.identifier.doi 10.1088/2041-8205/754/1/L15 es_ES
dc.identifier.publicationfirstpage L15 es_ES
dc.identifier.publicationissue 1 es_ES
dc.identifier.publicationvolume 754 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/268111
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.rights.accessRights openAccess en
dc.authorUAM Villaver Sobrino, Eva Gloria (262057)

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