TY - JOUR
T1 - 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
AU - Wisniewski, John P.
AU - Ge, Jian
AU - Crepp, Justin R.
AU - De Lee, Nathan
AU - Eastman, Jason
AU - Esposito, Massimiliano
AU - Fleming, Scott W.
AU - Gaudi, B. Scott
AU - Ghezzi, Luan
AU - Gonzalez Hernandez, Jonay I.
AU - Lee, Brian L.
AU - Stassun, Keivan G.
AU - Agol, Eric
AU - Prieto, Carlos Allende
AU - Barnes, Rory
AU - Bizyaev, Dmitry
AU - Cargile, Phillip
AU - Chang, Liang
AU - Da Costa, Luiz N.
AU - Porto De Mello, G. F.
AU - Femenía, Bruno
AU - Ferreira, Leticia D.
AU - Gary, Bruce
AU - Hebb, Leslie
AU - Holtzman, Jon
AU - Liu, Jian
AU - Ma, Bo
AU - MacK, Claude E.
AU - Mahadevan, Suvrath
AU - Maia, Marcio A.G.
AU - Nguyen, Duy Cuong
AU - Ogando, Ricardo L.C.
AU - Oravetz, Daniel J.
AU - Paegert, Martin
AU - Pan, Kaike
AU - Pepper, Joshua
AU - Rebolo, Rafael
AU - Santiago, Basilio
AU - Schneider, Donald P.
AU - Shelden, Alaina C.
AU - Simmons, Audrey
AU - Tofflemire, Benjamin M.
AU - Wan, Xiaoke
AU - Wang, Ji
AU - Zhao, Bo
PY - 2012/5
Y1 - 2012/5
N2 - 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 (T eff ≲ 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged (≲5Gyr) solar-like star having a mass of 1.07 ± 0.08 M 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 2years. 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 ± 11ms -1. We determine the minimum companion mass (if sin i = 1) to be 97.7 ± 5.8 M Jup. 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 (T eff ≲ 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.
AB - 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 (T eff ≲ 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged (≲5Gyr) solar-like star having a mass of 1.07 ± 0.08 M 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 2years. 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 ± 11ms -1. We determine the minimum companion mass (if sin i = 1) to be 97.7 ± 5.8 M Jup. 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 (T eff ≲ 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.
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U2 - 10.1088/0004-6256/143/5/107
DO - 10.1088/0004-6256/143/5/107
M3 - Article
AN - SCOPUS:84859926174
SN - 0004-6256
VL - 143
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
M1 - 107
ER -