TY - JOUR
T1 - Very low mass stellar and substellar companions to solar-like stars from marvels. IV. A candidate brown dwarf or low-mass stellar companion to hip 67526
AU - Jiang, Peng
AU - Ge, Jian
AU - Cargile, Phillip
AU - Crepp, Justin R.
AU - De Lee, Nathan
AU - Porto De Mello, Gustavo F.
AU - Esposito, Massimiliano
AU - Ferreira, Letícia D.
AU - Femenia, Bruno
AU - Fleming, Scott W.
AU - Gaudi, B. Scott
AU - Ghezzi, Luan
AU - González Hernández, Jonay I.
AU - Hebb, Leslie
AU - Lee, Brian L.
AU - Ma, Bo
AU - Stassun, Keivan G.
AU - Wang, Ji
AU - Wisniewski, John P.
AU - Agol, Eric
AU - Bizyaev, Dmitry
AU - Brewington, Howard
AU - Chang, Liang
AU - Da Costa, Luiz Nicolaci
AU - Eastman, Jason D.
AU - Ebelke, Garrett
AU - Gary, Bruce
AU - Kane, Stephen R.
AU - Li, Rui
AU - Liu, Jian
AU - Mahadevan, Suvrath
AU - Maia, Marcio A.G.
AU - Malanushenko, Viktor
AU - Malanushenko, Elena
AU - Muna, Demitri
AU - Nguyen, Duy Cuong
AU - Ogando, Ricardo L.C.
AU - Oravetz, Audrey
AU - Oravetz, Daniel
AU - Pan, Kaike
AU - Pepper, Joshua
AU - Paegert, Martin
AU - Allende Prieto, Carlos
AU - Rebolo, Rafael
AU - Santiago, Basilio X.
AU - Schneider, Donald P.
AU - Shelden Bradley, Alaina C.
AU - Sivarani, Thirupathi
AU - Snedden, Stephanie
AU - Van Eyken, J. C.
AU - Wan, Xiaoke
AU - Weaver, Benjamin A.
AU - Zhao, Bo
PY - 2013/9
Y1 - 2013/9
N2 - We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey (MARVELS). The radial velocity curve for this object contains 31 epochs spread over 2.5 yr.Our Keplerian fit, using a Markov Chain Monte Carlo approach, reveals that the companion has an orbital period of 90.2695+0.0188 -0.0187 days, an eccentricity of 0.4375±0.0040, and a semi-amplitude of 2948.14+16.65-16.55 m s-1. Using additional high-resolution spectroscopy, we find the host star has an effective temperature Teff= 6004 ± 34 K, a surface gravity log g (cgs) = 4.55 ± 0.17, and a metallicity [Fe/H] = +0.04 ± 0.06. The stellar mass and radius determined through the empirical relationship of Torres et al. yields 1.10±0.09M⊙ and 0.92±0.19R⊙. The minimummass ofMARVELS-5b is 65.0±2.9MJup, indicating that it is likely to be either a BD or a very low mass star, thus occupying a relatively sparsely populated region of the mass function of companions to solar-type stars. The distance to this system is 101± 10 pc from the astrometric measurements of Hipparcos. No stellar tertiary is detected in the high-contrast images taken by either FastCam lucky imaging or Keck adaptive optics imaging, ruling out any star with mass greater than 0.2 M⊙ at a separation larger than 40 AU.
AB - We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey (MARVELS). The radial velocity curve for this object contains 31 epochs spread over 2.5 yr.Our Keplerian fit, using a Markov Chain Monte Carlo approach, reveals that the companion has an orbital period of 90.2695+0.0188 -0.0187 days, an eccentricity of 0.4375±0.0040, and a semi-amplitude of 2948.14+16.65-16.55 m s-1. Using additional high-resolution spectroscopy, we find the host star has an effective temperature Teff= 6004 ± 34 K, a surface gravity log g (cgs) = 4.55 ± 0.17, and a metallicity [Fe/H] = +0.04 ± 0.06. The stellar mass and radius determined through the empirical relationship of Torres et al. yields 1.10±0.09M⊙ and 0.92±0.19R⊙. The minimummass ofMARVELS-5b is 65.0±2.9MJup, indicating that it is likely to be either a BD or a very low mass star, thus occupying a relatively sparsely populated region of the mass function of companions to solar-type stars. The distance to this system is 101± 10 pc from the astrometric measurements of Hipparcos. No stellar tertiary is detected in the high-contrast images taken by either FastCam lucky imaging or Keck adaptive optics imaging, ruling out any star with mass greater than 0.2 M⊙ at a separation larger than 40 AU.
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U2 - 10.1088/0004-6256/146/3/65
DO - 10.1088/0004-6256/146/3/65
M3 - Article
AN - SCOPUS:84882793572
SN - 0004-6256
VL - 146
JO - Astronomical Journal
JF - Astronomical Journal
IS - 3
M1 - 65
ER -