Incidence of planet candidates in open clusters and a planet confirmation

Context. Detecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar metallicity, on mass, or on stellar environment. Aims. We present the first results of our HARPS long-term radial...

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Autores: Martins, Bruno Leonardo Canto, Leão, I. C., Alves, S., Oliveira, G. Pereira de, Cortés, C., Brucalassi, A., Melo, C. H. F., Freitas, D. B. de, Pasquini, L., Medeiros, J. R. de
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Brasil
Institución:Universidade Federal do Rio Grande do Norte (UFRN)
Repositorio:Repositório Institucional da UFRN
Idioma:inglés
OAI Identifier:oai:repositorio.ufrn.br:123456789/29405
Acceso en línea:https://repositorio.ufrn.br/jspui/handle/123456789/29405
http://dx.doi.org/10.1051/0004-6361/201833123
Access Level:acceso abierto
Palabra clave:Planetary systems
Open clusters and associations: general
Stars: late-type
Binaries: spectroscopic
Techniques: radial velocities
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spelling Incidence of planet candidates in open clusters and a planet confirmationPlanetary systemsOpen clusters and associations: generalStars: late-typeBinaries: spectroscopicTechniques: radial velocitiesContext. Detecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar metallicity, on mass, or on stellar environment. Aims. We present the first results of our HARPS long-term radial velocity (RV) survey which aims to discover exoplanets around intermediate-mass (between ∼2 and 6 M ) evolved stars in open clusters. Methods. We selected 826 bona fide HARPS observations of 114 giants from an initial list of 29 open clusters and computed the halfpeak to peak variability of the HARPS RV measurements, namely ∆RV=2, for each target, to search for the best planet-host candidates. We also performed time series analyses for a few targets for which we have enough observations to search for orbital solutions. Results. Although we attempted to rule out the presence of binaries on the basis of previous surveys, we detected 14 new binary candidates in our sample, most of them identified from a comparison between HARPS and CORAVEL data. We also suggest 11 new planet-host candidates based on a relation between the stellar surface gravity and ∆RV=2. Ten of the candidates are less than 3 M , showing evidence of a low planet occurrence rate for massive stars. One of the planet-host candidates and one of the binary candidates show very clear RV periodic variations, allowing us to confirm the discovery of a new planet and to compute the orbital solution for the binary. The planet is IC 4651 9122b, with a minimum mass of m sin i = 6:3 MJ and a semimajor axis a = 2:0 AU. The binary companion is NGC 5822 201B, with a very low minimum mass of m sin i = 0:11 M and a semimajor axis a = 6:5 AU, which is comparable to the Jupiter distance to the Sun.EDPSCIENCE2020-07-02T20:57:54Z2020-07-02T20:57:54Z2018-12-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfLEÃO, I. C.; MARTINS, Bruno Leonardo Canto; ALVES, S.; OLIVEIRA, G. Pereira de; CORTÉS, C.; BRUCALASSI, A.; MELO, C. H. F.; FREITAS, D. B. de; PASQUINI, L.; MEDEIROS, J. R. de. Incidence of planet candidates in open clusters and a planet confirmation. Astronomy & Astrophysics, [s.l.], v. 620, p. A139 (15p.), dez. 2018. ISSN 1432-0746 versão online. Disponível em: https://www.aanda.org/articles/aa/abs/2018/12/aa33123-18/aa33123-18.html. Acesso em 02 jul. 2020. http://dx.doi.org/10.1051/0004-6361/201833123. Reproduzido com permissão da Astronomy & Astrophysics, © ESO.0004-6361 (print), 1432-0746 (online)https://repositorio.ufrn.br/jspui/handle/123456789/29405http://dx.doi.org/10.1051/0004-6361/201833123ark:/41046/001300001p8r1engreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessMartins, Bruno Leonardo CantoLeão, I. C.Alves, S.Oliveira, G. Pereira deCortés, C.Brucalassi, A.Melo, C. H. F.Freitas, D. B. dePasquini, L.Medeiros, J. R. de2020-07-05T07:47:01Zoai:repositorio.ufrn.br:123456789/29405Repositório InstitucionalPUBhttp://repositorio.ufrn.br/oai/repositorio@bczm.ufrn.bropendoar:2020-07-05T07:47:01Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.none.fl_str_mv Incidence of planet candidates in open clusters and a planet confirmation
title Incidence of planet candidates in open clusters and a planet confirmation
spellingShingle Incidence of planet candidates in open clusters and a planet confirmation
Martins, Bruno Leonardo Canto
Planetary systems
Open clusters and associations: general
Stars: late-type
Binaries: spectroscopic
Techniques: radial velocities
title_short Incidence of planet candidates in open clusters and a planet confirmation
title_full Incidence of planet candidates in open clusters and a planet confirmation
title_fullStr Incidence of planet candidates in open clusters and a planet confirmation
title_full_unstemmed Incidence of planet candidates in open clusters and a planet confirmation
title_sort Incidence of planet candidates in open clusters and a planet confirmation
dc.creator.none.fl_str_mv Martins, Bruno Leonardo Canto
Leão, I. C.
Alves, S.
Oliveira, G. Pereira de
Cortés, C.
Brucalassi, A.
Melo, C. H. F.
Freitas, D. B. de
Pasquini, L.
Medeiros, J. R. de
author Martins, Bruno Leonardo Canto
author_facet Martins, Bruno Leonardo Canto
Leão, I. C.
Alves, S.
Oliveira, G. Pereira de
Cortés, C.
Brucalassi, A.
Melo, C. H. F.
Freitas, D. B. de
Pasquini, L.
Medeiros, J. R. de
author_role author
author2 Leão, I. C.
Alves, S.
Oliveira, G. Pereira de
Cortés, C.
Brucalassi, A.
Melo, C. H. F.
Freitas, D. B. de
Pasquini, L.
Medeiros, J. R. de
author2_role author
author
author
author
author
author
author
author
author
dc.subject.por.fl_str_mv Planetary systems
Open clusters and associations: general
Stars: late-type
Binaries: spectroscopic
Techniques: radial velocities
topic Planetary systems
Open clusters and associations: general
Stars: late-type
Binaries: spectroscopic
Techniques: radial velocities
description Context. Detecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar metallicity, on mass, or on stellar environment. Aims. We present the first results of our HARPS long-term radial velocity (RV) survey which aims to discover exoplanets around intermediate-mass (between ∼2 and 6 M ) evolved stars in open clusters. Methods. We selected 826 bona fide HARPS observations of 114 giants from an initial list of 29 open clusters and computed the halfpeak to peak variability of the HARPS RV measurements, namely ∆RV=2, for each target, to search for the best planet-host candidates. We also performed time series analyses for a few targets for which we have enough observations to search for orbital solutions. Results. Although we attempted to rule out the presence of binaries on the basis of previous surveys, we detected 14 new binary candidates in our sample, most of them identified from a comparison between HARPS and CORAVEL data. We also suggest 11 new planet-host candidates based on a relation between the stellar surface gravity and ∆RV=2. Ten of the candidates are less than 3 M , showing evidence of a low planet occurrence rate for massive stars. One of the planet-host candidates and one of the binary candidates show very clear RV periodic variations, allowing us to confirm the discovery of a new planet and to compute the orbital solution for the binary. The planet is IC 4651 9122b, with a minimum mass of m sin i = 6:3 MJ and a semimajor axis a = 2:0 AU. The binary companion is NGC 5822 201B, with a very low minimum mass of m sin i = 0:11 M and a semimajor axis a = 6:5 AU, which is comparable to the Jupiter distance to the Sun.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-10
2020-07-02T20:57:54Z
2020-07-02T20:57:54Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv LEÃO, I. C.; MARTINS, Bruno Leonardo Canto; ALVES, S.; OLIVEIRA, G. Pereira de; CORTÉS, C.; BRUCALASSI, A.; MELO, C. H. F.; FREITAS, D. B. de; PASQUINI, L.; MEDEIROS, J. R. de. Incidence of planet candidates in open clusters and a planet confirmation. Astronomy & Astrophysics, [s.l.], v. 620, p. A139 (15p.), dez. 2018. ISSN 1432-0746 versão online. Disponível em: https://www.aanda.org/articles/aa/abs/2018/12/aa33123-18/aa33123-18.html. Acesso em 02 jul. 2020. http://dx.doi.org/10.1051/0004-6361/201833123. Reproduzido com permissão da Astronomy & Astrophysics, © ESO.
0004-6361 (print), 1432-0746 (online)
https://repositorio.ufrn.br/jspui/handle/123456789/29405
http://dx.doi.org/10.1051/0004-6361/201833123
dc.identifier.dark.fl_str_mv ark:/41046/001300001p8r1
identifier_str_mv LEÃO, I. C.; MARTINS, Bruno Leonardo Canto; ALVES, S.; OLIVEIRA, G. Pereira de; CORTÉS, C.; BRUCALASSI, A.; MELO, C. H. F.; FREITAS, D. B. de; PASQUINI, L.; MEDEIROS, J. R. de. Incidence of planet candidates in open clusters and a planet confirmation. Astronomy & Astrophysics, [s.l.], v. 620, p. A139 (15p.), dez. 2018. ISSN 1432-0746 versão online. Disponível em: https://www.aanda.org/articles/aa/abs/2018/12/aa33123-18/aa33123-18.html. Acesso em 02 jul. 2020. http://dx.doi.org/10.1051/0004-6361/201833123. Reproduzido com permissão da Astronomy & Astrophysics, © ESO.
0004-6361 (print), 1432-0746 (online)
ark:/41046/001300001p8r1
url https://repositorio.ufrn.br/jspui/handle/123456789/29405
http://dx.doi.org/10.1051/0004-6361/201833123
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDPSCIENCE
publisher.none.fl_str_mv EDPSCIENCE
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
repository.name.fl_str_mv Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv repositorio@bczm.ufrn.br
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score 15,300719

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