Chromospheric activity of stars with planets

dc.contributor.authorMartins, Bruno Leonardo Canto
dc.contributor.authorChagas, M. L. das
dc.contributor.authorAlves, S.
dc.contributor.authorLeão, Izan de Castro
dc.contributor.authorSouza Neto, L. P. de
dc.contributor.authorMedeiros, José Renan de
dc.date.accessioned2020-05-18T18:44:14Z
dc.date.available2020-05-18T18:44:14Z
dc.date.issued2011
dc.description.resumoContext. Signatures of chromospheric activity enhancement have been found for a dozen stars, pointing to a possible star-planet interaction. Nevertheless in the coronal activity regime, there is no conclusive observational evidence of such an interaction. Does star-planet interaction manifest itself only for a few particular cases, without having a major effect on stars with planets in general? Aims. We aim to add additional observational constraints to support or reject the major effects of star-planet interactions in stellar activity, based on Ca II chromospheric emission flux. Methods. We performed a statistical analysis of Ca II emission flux of stars with planets, as well as a comparison between Ca II and X-ray emission fluxes, searching for dependencies on planetary parameters. Results. In the present sample of stars with planets, there are no significant correlations between chromospheric activity indicator log(RHK) and planetary parameters. Furthermore, the distribution of the chromospheric activity indicator for stars without planets is indistinguishable from the one with planets.pt_BR
dc.identifier.citationMEDEIROS, José Renan de et al. Chromospheric activity of stars with planets. Astronomy & Astrophysics (Berlin. Print), p. 73-78, 2011. ISSN 1432-0746 versão online. DOI https://doi.org/10.1051/0004-6361/201015314. Disponível em: https://www.aanda.org/articles/aa/abs/2011/06/aa15314-10/aa15314-10.html. Acesso em: 18 maio 2020. Reproduzido com permissão da Astronomy & Astrophysics, © ESO..pt_BR
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201015314
dc.identifier.issn0004-6361 (print), 1432-0746 (online)
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/28999
dc.languageenpt_BR
dc.publisherAstronomy & Astrophysicspt_BR
dc.subjectPlanet-star interactionspt_BR
dc.subjectStars: activitypt_BR
dc.subjectStars: chromospherespt_BR
dc.subjectStars: coronaept_BR
dc.subjectStars: statisticspt_BR
dc.titleChromospheric activity of stars with planetspt_BR
dc.typearticlept_BR

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