Repositório Digital

A- A A+

Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b

.

Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b

Mostrar registro completo

Estatísticas

Título Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b
Autor De Lee, Nathan M.
Ge, Jian
Crepp, Justin R.
Eastman, Jason
Esposito, Massimiliano
Femenía Castellá, B.
Fleming, S.W.
Gaudi, B. S.
Ghezzi, Luan
González Hernández, Jonay I.
Lee, Brian L.
Stassun, Keivan G.
Wisniewski, J.P.
Wood-Vasey, W.M.
Agol, Eric
Allende Prieto, Carlos
Barnes, Rory
Bizyaev, D.
Cargile, Phillip A.
Chang, Liang
Costa, Luiz N. da
Mello, Gustavo Frederico Porto de
Ferreira, Letícia D.
Gary, Bruce L.
Hebb, Leslie
Holtzman, J.A.
Liu, Jian
Ma, Bo
Mack, C. E.
Mahadevan, Suvrath
Maia, Marcio Antonio Geimba
Nguyen, D.C.
Oravetz, Audrey
Oravetz, Daniel J.
Paegert, Martin
Pan, K.
Pepper, J.
Malanushenko, E.
Malanushenko, V.
Rebolo, Rafael
Santiago, Basilio Xavier
Schneider, D.P.
Bradley, Alaina C. Shelden
Wan, Xiaoke
Wang, Ji
Zhao, Bo
Abstract We describe the discovery of a likely brown dwarf (BD) companion with a minimum mass of 31.7 ± 2.0 MJup to GSC 03546-01452 from the MARVELS radial velocity survey, which we designate as MARVELS-6b. For reasonable priors, our analysis gives a probability of 72% that MARVELS-6b has a mass below the hydrogen-burning limit of 0.072M , and thus it is a high-confidence BDcompanion. It has amoderately long orbital period of 47.8929+0.0063 −0.0062 days with a low eccentricity of 0.1442+0.0078 −0.0073, and a semi-amplitude of 1644+12 −13 m s−1. Moderate resolution spectroscopy of the host star has determined the following parameters: Teff = 5598 ± 63, log g = 4.44 ± 0.17, and [Fe/H] = +0.40 ± 0.09. Based upon these measurements, GSC 03546-01452 has a probable mass and radius of M∗ = 1.11±0.11M and R∗ = 1.06±0.23R with an age consistent with less than ∼6 Gyr at a distance of 219 ± 21 pc from the Sun. Although MARVELS-6b is not observed to transit, we cannot definitively rule out a transiting configuration based on our observations. There is a visual companion detected with Lucky Imaging at 7. 7 from the host star, but our analysis shows that it is not bound to this system. The minimum mass of MARVELS-6b exists at the minimum of the mass functions for both stars and planets, making this a rare object even compared to other BDs. It also exists in an underdense region in both period/eccentricity and metallicity/eccentricity space.
Contido em The Astronomical journal. Vol. 145, no. 6 (June 2013), 155, 15 p.
Assunto Anãs marrons
Dimensões estelares
Espectros estelares
Estrelas binarias
Massa estelar
Movimento estelar
Rotacao estelar
[en] Brown dwarfs
[en] Stars: individual (GSC 03546-01452)
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108158
Arquivos Descrição Formato
000900790.pdf (2.429Mb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.