期刊
ASTRONOMICAL JOURNAL
卷 143, 期 5, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0004-6256/143/5/107
关键词
binaries: general; stars: individual (TYC 4110-01037-1); stars: low mass
资金
- NSF AAPF AST [08-02230]
- NSF [AST 0645416, AST-1056524, AST0349075, AST-0705139]
- Vanderbilt Initiative in Data-Intensive Astrophysics (VIDA)
- CNPq [476909/2006-6]
- FAPERJ [APQ1/26/170.687/2004]
- PAPDRJ CAPES/FAPERJ
- W.M. Keck Foundation
- SDSS-III consortium
- NASA [NNX07AP14G]
- University of Florida
- Pennsylvania State University
- Eberly College of Science
- Pennsylvania Space Grant Consortium
- Instituto Nazionale di Astrofisica (INAF), in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias (IAC)
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- SDSS-III Collaboration
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- University of Cambridge
- French Participation Group
- German Participation Group
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- New Mexico State University
- New York University
- Ohio State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1108882] Funding Source: National Science Foundation
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 less than or similar to 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it to be a moderately aged (less than or similar to 5 Gyr) solar-like star having a mass of 1.07 +/- 0.08 M-circle dot and radius of 0.99 +/- 0.18 R-circle dot. 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 similar to 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 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 less than or similar to 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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