TY - JOUR
T1 - 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
AU - De Lee, Nathan
AU - Ge, Jian
AU - Crepp, Justin R.
AU - Eastman, Jason
AU - Esposito, Massimiliano
AU - Femenía, Bruno
AU - Fleming, Scott W.
AU - Gaudi, B. Scott
AU - Ghezzi, Luan
AU - González Hernández, Jonay I.
AU - Lee, Brian L.
AU - Stassun, Keivan G.
AU - Wisniewski, John P.
AU - Wood-Vasey, W. Michael
AU - Agol, Eric
AU - Allende Prieto, Carlos
AU - Barnes, Rory
AU - Bizyaev, Dmitry
AU - Cargile, Phillip
AU - Chang, Liang
AU - Da Costa, Luiz N.
AU - De Mello, G. F.Porto
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 - Oravetz, Audrey
AU - Oravetz, Daniel J.
AU - Paegert, Martin
AU - Pan, Kaike
AU - Pepper, Joshua
AU - Malanushenko, Elena
AU - Malanushenko, Viktor
AU - Rebolo, Rafael
AU - Santiago, Basilio X.
AU - Schneider, Donald P.
AU - Shelden Bradley, Alaina C.
AU - Wan, Xiaoke
AU - Wang, Ji
AU - Zhao, Bo
PY - 2013/6
Y1 - 2013/6
N2 - 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 0.072 Mȯ, and thus it is a high-confidence BD companion. It has a moderately 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 ± 0.11 Mȯ and R* = 1.06 ± 0.23 RȮ 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.
AB - 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 0.072 Mȯ, and thus it is a high-confidence BD companion. It has a moderately 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 ± 0.11 Mȯ and R* = 1.06 ± 0.23 RȮ 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.
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U2 - 10.1088/0004-6256/145/6/155
DO - 10.1088/0004-6256/145/6/155
M3 - Article
AN - SCOPUS:84877985838
SN - 0004-6256
VL - 145
JO - Astronomical Journal
JF - Astronomical Journal
IS - 6
M1 - 155
ER -