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Very low mass stellar and substellar companions to solar-like stars from MARVELS. I. A low-mass ratio stellar companion to TYC 4110-01037-1 in a 79 day orbit

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Very low mass stellar and substellar companions to solar-like stars from MARVELS. I. A low-mass ratio stellar companion to TYC 4110-01037-1 in a 79 day orbit

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Título Very low mass stellar and substellar companions to solar-like stars from MARVELS. I. A low-mass ratio stellar companion to TYC 4110-01037-1 in a 79 day orbit
Autor Wisniewski, J.P.
Ge, Jian
Crepp, Justin R.
De Lee, Nathan M.
Eastman, Jason
Esposito, Massimiliano
Fleming, S.W.
Gaudi, B. S.
Ghezzi, Luan
González Hernández, Jonay I.
Lee, Brian L.
Stassun, Keivan G.
Agol, Eric
Allende Prieto, Carlos
Barnes, Rory
Bizyaev, D.
Cargile, Phillip A.
Chang, Liang
Costa, Luiz N. da
Mello, Gustavo Frederico Porto de
Femenía Castellá, B.
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.
Ogando, Ricardo L.C.
Oravetz, Daniel J.
Paegert, Martin
Pan, K.
Pepper, J.
Rebolo, Rafael
Santiago, Basilio Xavier
Schneider, D.P.
Bradley, Alaina C. Shelden
Simmons, Audrey E.
Tofflemire, Benjamin M.
Wan, Xiaoke
Wang, Ji
Zhao, Bo
Abstract TYC 4110-01037-1 has a low-mass stellar companion, whose small mass ratio and short orbital period are atypical among binary systems with solar-like (Teff 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged ( 5 Gyr) solar-like star having a mass of 1.07 ± 0.08M and radius of 0.99 ± 0.18 R . We analyze 32 radial velocity (RV) measurements from the SDSS-III MARVELS survey as well as 6 supporting RV measurements from the SARG spectrograph on the 3.6 m Telescopio Nazionale Galileo telescope obtained over a period of ∼2 years. The best Keplerian orbital fit parameters were found to have a period of 78.994 ± 0.012 days, an eccentricity of 0.1095 ± 0.0023, and a semi-amplitude of 4199 ± 11 m s−1. We determine the minimum companion mass (if sin i = 1) to be 97.7 ± 5.8 MJup. The system’s companion to host star mass ratio, 0.087 ± 0.003, places it at the lowest end of observed values for short period stellar companions to solar-like (Teff 6000 K) stars. One possible way to create such a system would be if a triple-component stellar multiple broke up into a short period, low q binary during the cluster dispersal phase of its lifetime. A candidate tertiary body has been identified in the system via single-epoch, high contrast imagery. If this object is confirmed to be comoving, we estimate it would be a dM4 star. We present these results in the context of our larger-scale effort to constrain the statistics of low-mass stellar and brown dwarf companions to FGK-type stars via the MARVELS survey.
Contido em The Astronomical journal. Vol. 143, no. 5 (May 2012), 107, 12 p.
Assunto Anãs marrons
Estrelas binarias
Massa estelar
Mecanica celeste
Movimento estelar
[en] Binaries: general
[en] Stars: individual (TYC 4110-01037-1)
[en] Stars: low mass
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108139
Arquivos Descrição Formato
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