TY - JOUR
T1 - Exploring the brown dwarf desert
T2 - New substellar companions from the SDSS-III MARVELS survey
AU - Grieves, Nolan
AU - Ge, Jian
AU - Thomas, Neil
AU - Ma, Bo
AU - Sithajan, Sirinrat
AU - Ghezzi, Luan
AU - Kimock, Ben
AU - Willis, Kevin
AU - De Lee, Nathan
AU - Lee, Brian
AU - Fleming, Scott W.
AU - Agol, Eric
AU - Troup, Nicholas
AU - Paegert, Martin
AU - Schneider, Donald P.
AU - Stassun, Keivan
AU - Varosi, Frank
AU - Zhao, Bo
AU - Jian, Liu
AU - Li, Rui
AU - Porto de Mello, Gustavo F.
AU - Bizyaev, Dmitry
AU - Pan, Kaike
AU - Dutra-Ferreira, Letícia
AU - Lorenzo-Oliveira, Diego
AU - Santiago, Basílio X.
AU - da Costa, Luiz N.
AU - Maia, Marcio A.G.
AU - Ogando, Ricardo L.C.
AU - del Peloso, E. F.
N1 - Publisher Copyright:
© 2017 The Authors.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ∼5 au in the mass range of ∼10–80 MJup. This deficit, known as the brown dwarf desert, currently has no conclusive explanation. New substellar companions in this region help assess the reality of the desert and provide insight to the formation and evolution of these objects. Here, we present 10 new brown dwarf and 2 low-mass stellar companion candidates around solar-type stars from the Multi-object APO Radial Velocity Exoplanet Large-Area Survey (MARVELS) of the Sloan Digital Sky Survey III. These companions were selected from processed MARVELS data using the latest University of Florida Two Dimensional pipeline, which shows significant improvement and reduction of systematic errors over previous pipelines. The 10 brown dwarf companions range in mass from ∼13 to 76 MJup and have orbital radii of less than 1 au. The two stellar companions have minimum masses of ∼98 and 100 MJup. The host stars of the MARVELS brown dwarf sample have a mean metallicity of [Fe/H] = 0.03 ± 0.08 dex. Given our stellar sample we estimate the brown dwarf occurrence rate around solar-type stars with periods less than ∼300 d to be ∼0.56 per cent.
AB - Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ∼5 au in the mass range of ∼10–80 MJup. This deficit, known as the brown dwarf desert, currently has no conclusive explanation. New substellar companions in this region help assess the reality of the desert and provide insight to the formation and evolution of these objects. Here, we present 10 new brown dwarf and 2 low-mass stellar companion candidates around solar-type stars from the Multi-object APO Radial Velocity Exoplanet Large-Area Survey (MARVELS) of the Sloan Digital Sky Survey III. These companions were selected from processed MARVELS data using the latest University of Florida Two Dimensional pipeline, which shows significant improvement and reduction of systematic errors over previous pipelines. The 10 brown dwarf companions range in mass from ∼13 to 76 MJup and have orbital radii of less than 1 au. The two stellar companions have minimum masses of ∼98 and 100 MJup. The host stars of the MARVELS brown dwarf sample have a mean metallicity of [Fe/H] = 0.03 ± 0.08 dex. Given our stellar sample we estimate the brown dwarf occurrence rate around solar-type stars with periods less than ∼300 d to be ∼0.56 per cent.
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U2 - 10.1093/mnras/stx334
DO - 10.1093/mnras/stx334
M3 - Review article
AN - SCOPUS:85051546763
SN - 0035-8711
VL - 467
SP - 4264
EP - 4281
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -