J/ApJ/806/60 Radial velocities of 70 Vir (HD117176) (Kane+, 2015)
A comprehensive characterization of the 70 Virginis planetary system.
Kane S.R., Boyajian T.S., Henry G.W., Feng Y.K., Hinkel N.R., Fischer D.A.,
von Braun K., Howard A.W., Wright J.T.
<Astrophys. J., 806, 60 (2015)>
=2015ApJ...806...60K 2015ApJ...806...60K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, double and multiple ; Radial velocities
Keywords: planetary systems; stars: individual: 70 Vir;
techniques: photometric; techniques: radial velocities
Abstract:
An on-going effort in the characterization of exoplanetary systems is
the accurate determination of host star properties. This effort
extends to the relatively bright host stars of planets discovered with
the radial velocity method. The Transit Ephemeris Refinement and
Monitoring Survey (TERMS) is aiding in these efforts as part of its
observational campaign for exoplanet host stars. One of the first
known systems is that of 70 Virginis, which harbors a jovian planet in
an eccentric orbit. Here we present a complete characterization of
this system with a compilation of TERMS photometry, spectroscopy, and
interferometry. We provide fundamental properties of the host star
through direct interferometric measurements of the radius (1.5%
uncertainty) and through spectroscopic analysis. We combined 59 new
Keck HIRES radial velocity measurements with the 169 previously
published from the ELODIE, Hamilton, and HIRES spectrographs, to
calculate a refined orbital solution and construct a transit ephemeris
for the planet. These newly determined system characteristics are used
to describe the Habitable Zone of the system with a discussion of
possible additional planets and related stability simulations.
Finally, we present 19 years of precision robotic photometry that
constrain stellar activity and rule out central planetary transits for
a Jupiter-radius planet at the 5σ level, with reduced
significance down to an impact parameter of b=0.95.
Description:
Our interferometric observations of 70 Vir were conducted at the
Georgia State University's Center for High Angular Resolution
Astronomy (CHARA) Array and the Classic beam combiner in two-telescope
mode operating in H-band. We collected a total of 13 observations over
the course of three nights: two nights in 2013 April using the S1E1
pair of telescopes, and one night in 2014 April using the W1E1 pair of
telescopes.
Previously published data for 70 Vir includes 169 measurements
acquired with the Hamilton Echelle Spectrograph on the 3.0m Shane
Telescope at Lick Observatory (Marcy & Butler 1996ApJ...464L.147M 1996ApJ...464L.147M;
Butler et al. 2006, J/ApJ/646/505; Fischer et al. 2014, J/ApJS/210/5)
and 35 measurements acquired with the ELODIE spectrograph on the 1.93m
telescope at Observatoire de Haute-Provence (Naef et al. 2004,
J/A+A/414/351). We add to these time series 59 new measurements
acquired with the HIRES echelle spectrometer on the 10.0m Keck I
telescope, taken on 2009 July 3.
Objects:
---------------------------------------------------------------
RA (ICRS) DE Designation(s) Period (d)
---------------------------------------------------------------
13 28 25.81 +13 46 43.6 70 Vir = HD 117176 (P=116.693)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 32 263 70 Vir radial velocities
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See also:
J/AJ/148/54 : The Hypatia Catalog ((Hinkel+, 2014)
J/AJ/147/86 : From binaries to multiples. I. FG-67 sample (Tokovinin, 2014)
J/ApJS/211/2 : Revised stellar data of Q1-16 Kepler targets (Huber+, 2014)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/ApJ/768/155 : RVs and photometry of HD 38529 system (Henry+, 2013)
J/ApJ/767/95 : Stellar parameters of smallest KIC stars (Dressing+, 2013)
J/A+A/553/A95 : PCA approach to stellar temperatures (Bermejo+, 2013)
J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)
J/PASP/124/140 : UBVRI Hp BT and VT photonic responses (Bessell+, 2012)
J/A+A/546/A61 : Radial velocities for XHIP catalogue (de Bruijne+, 2012)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/A+A/526/A71 : C abundances in G and K nearby stars (da Silva+, 2011)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/MNRAS/378/1141 : Abundances in 31 stars with planet (Gonzalez+, 2007)
J/PASJ/59/335 : Properties of 160 F-K disk dwarfs/subgiants (Takeda+, 2007)
J/ApJ/649/1010 : Habitability of known exoplanetary systems (Jones+, 2006)
J/ApJ/646/523 : Exoplanet systems with stellar companions (Raghavan+, 2006)
J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)
J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJS/154/673 : COBE DIRBE Point Source Catalog (Smith+, 2004)
J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)
J/A+A/414/351 : ELODIE survey for northern exoplanets III (Naef+, 2004)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d JD Geocentric Julian Date; JD-2440000
13- 18 F6.1 m/s RV [-242/515] Radial Velocity
20- 23 F4.1 m/s e_RV [1/14] 1σ RV
25- 32 A8 --- Inst Telescope or Instrument (ELODIE, HIRES
or Hamilton)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Oct-2015