J/AJ/143/107 Radial velocities of TYC 4110-01037-1 (Wisniewski+, 2012)
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.
Wisniewski J.P., Ge J., Crepp J.R., De Lee N., Eastman J., Esposito M.,
Fleming S.W., Gaudi B.S., Ghezzi L., Gonzalez Hernandez J.I., Lee B.L.,
Stassun K.G., Agol E., Prieto C.A., Barnes R., Bizyaev D., Cargile P.,
Chang L., Da Costa L.N., Porto De Mello G.F., Femenia B., Ferreira L.D.,
Gary B., Hebb L., Holtzman J., Liu J., Ma B., Mack C.E., Mahadevan S.,
Maia M.A.G., Nguyen D.C., Ogando R.L.C., Oravetz D.J., Paegert M., Pan K.,
Pepper J., Rebolo R., Santiago B., Schneider D.P., Shelden A.C.,
Simmons A., Tofflemire B.M., Wan X., Wang J., Zhao B.
<Astron. J., 143, 107 (2012)>
=2012AJ....143..107W 2012AJ....143..107W
ADC_Keywords: Stars, double and multiple ; Radial velocities
Keywords: binaries: general - stars: individual (TYC 4110-01037-1) -
stars: low mass
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 (Teff≲6000K) primary stars. Our analysis of
TYC 4110-01037-1 reveals it to be a moderately aged (≲5Gyr)
solar-like star having a mass of 1.07±0.08M☉ and radius of
0.99±0.18R☉. 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 3.6m Telescopio
Nazionale Galileo telescope obtained over a period of ∼2years. The
best Keplerian orbital fit parameters were found to have a period of
78.994±0.012days, an eccentricity of 0.1095±0.0023, and a
semi-amplitude of 4199±11m/s. We determine the minimum companion
mass (if sini=1) to be 97.7±5.8MJup. 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
(Teff≲6000K) 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.
Description:
The Multi-object APO Radial Velocity Exoplanet Large-area Survey
(MARVELS), one of the three surveys being executed during the Sloan
Digital Sky Survey (SDSS) III (Eisenstein et al., 2011AJ....142...72E 2011AJ....142...72E),
is a four-year program which is monitoring the radial velocities of
∼3300 V=7.6-12 FGK-type dwarfs and subgiants.
Our primary RV observations of TYC 4110-01037-1 were obtained during
the first two years of the SDSS-III MARVELS survey, which uses a
dispersed fixed-delay interferometer on the SDSS 2.5m telescope. A
total of 32 observations were obtained over the course of ∼2 years.
Each 50minute observation yielded two fringing spectra from the
interferometer spanning the wavelength regime ∼500-570nm with R∼12000.
Supporting RV observations were obtained with the 3.6m Telescopio
Nazionale Galileo (TNG) using its SARG spectrograph. The 0.8"*5.3"
slit provided R∼57000 spectroscopy between 462-792nm.
Objects:
--------------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
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06 54 12.34 +60 21 31.4 TYC 4110-01037-1 = GSC 04110-01037 (P=78.994)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 29 38 Summary of observed radial velocities
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See also:
VI/135 : All-sky spectrally matched Tycho2 stars (Pickles+, 2010)
V/136 : Teff and metallicities for Tycho-2 stars (Ammons+, 2006)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
J/A+A/552/A78 : Solar like stars radial velocities (Zechmeister+, 2013)
J/A+A/525/A95 : Search for brown-dwarf companions of stars (Sahlmann+, 2011)
J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/ApJS/181/62 : Survey of young solar analogs (Metchev+, 2009)
J/PASP/120/1128 : Calibrated griz magnitudes of Tycho star (Ofek, 2008)
J/ApJ/640/1051 : 25pc sample of Sun-like stars (Grether+, 2006)
J/A+A/415/391 : The CORALIE survey for extrasolar planets. XII (Mayor+, 2004)
J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)
http://www.sdss3.org/ : SDSS-III Web site
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian Date
16 A1 --- Inst Instrument (1)
18- 23 F6.3 km/s RV [-4.24/4.117] Radial velocities
25- 29 F5.3 km/s e_RV 1σ uncertainty in RV
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Note (1): Instrument as follows:
M = MARVELS (Multi-object APO Radial Velocity Exoplanet Large-area Survey);
S = SARG spectrograph on the 3.6m Telescopio Nazionale Galileo telescope.
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History:
From electronic version of the journal
References:
Fleming et al. Paper II 2012AJ....144...72F 2012AJ....144...72F
Ma et al. Paper III 2013AJ....145...20M 2013AJ....145...20M
Jiang et al. Paper IV 2013AJ....146...65J 2013AJ....146...65J
De Lee et al. Paper V 2013AJ....145..155D 2013AJ....145..155D
Ma et al. Paper VI 2016AJ....152..112M 2016AJ....152..112M, Cat. J/AJ/152/112
(End) Sylvain Guehenneux [CDS] 05-Jun-2013