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
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Abstract
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 (≲ 5 Gyr) 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 ~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 ≲ 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.
Additional Information
© 2012 American Astronomical Society. Received 2011 October 25; accepted 2012 February 21; published 2012 March 27. We thank the referee for providing feedback which helped to improve the content and clarity of this manuscript. We also thank D. Raghavan for providing an electronic table of his published G dwarf binaries. This research was partially supported by NSF AAPF AST 08-02230 (J.P.W.), NSF CAREER Grant AST 0645416 (E.A.), NSF CAREER Grant AST-1056524 (B.S.G.), the Vanderbilt Initiative in Data-Intensive Astrophysics (VIDA) and NSF CAREER Grant AST0349075 (K.G.S., L.H., and J.P.), CNPq Grant 476909/2006-6 (G.F.P.M.), FAPERJ GrantAPQ1/26/170.687/2004 (G.F.P.M.), and a PAPDRJ CAPES/FAPERJ fellowship (L.G.). Funding for the MARVELS multi-object Doppler instrument was provided by the W.M. Keck Foundation and NSF Grant AST-0705139. The MARVELS survey was partially funded by the SDSSIII consortium, NSF Grant AST-0705139, NASA with grant NNX07AP14G and the University of Florida. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. This work has made use of observations taken with the Telescopio Nationale Galileo (TNG) operated on the island of La Palma by the Foundation Galileo Galilei, funded by the Instituto Nazionale di Astrofisica (INAF), in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias (IAC). We also make use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III Web site is http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, University of Florida, the French Participation Group, the German Participation Group, the Instituto de Astrofisica de Canarias, the 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, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University.Attached Files
Published - Wisniewski2012p18118Astron_J.pdf
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Additional details
Identifiers
- Eprint ID
- 31497
- Resolver ID
- CaltechAUTHORS:20120516-091934591
Funding
- NSF Astronomy and Astrophysics Fellowship
- AST 08-02230
- NSF
- AST-0645416
- NSF
- AST-1056524
- Vanderbilt Initiative in Data-Intensive Astrophysics (VIDA)
- NSF
- AST-0349075
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- 476909/2006-6
- Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- APQ1/26/170.687/2004
- PAPDRJ CAPES/FAPERJ fellowship
Dates
- Created
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2012-05-16Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field