J/AJ/161/106 Radial velocities of 12 Psc and HD 159062 (Bowler+, 2021)
The McDonald Accelerating Stars Survey (MASS): white dwarf companions
accelerating the Sun-like stars 12 Psc and HD 159062.
Bowler B.P., Cochran W.D., Endl M., Franson K., Brandt T.D., Dupuy T.J.,
MacQueen P.J., Kratter K.M., Mawet D., Ruane G.
<Astron. J., 161, 106 (2021)>
=2021AJ....161..106B 2021AJ....161..106B
ADC_Keywords: Stars, G-type; Stars, dwarfs; Stars, double and multiple;
Radial velocities; Spectra, optical
Keywords: White dwarf stars ; Direct imaging ; Binary stars ;
Astrometric binary stars ; Radial velocity ; Orbit determination
Abstract:
We present the discovery of a white dwarf companion to the G1 V star
12Psc found as part of a Keck adaptive optics imaging survey of
long-term accelerating stars from the McDonald Observatory Planet
Search Program. Twenty years of precise radial-velocity monitoring of
12Psc with the Tull Spectrograph at the Harlan J. Smith telescope
reveals a moderate radial acceleration (∼10m/s/yr), which together
with relative astrometry from Keck/NIRC2 and the astrometric
acceleration between Hipparcos and Gaia DR2 yields a dynamical mass of
MB=0.605-0.022+0.021M☉ for 12PscB, a semimajor axis of
40-4+2au, and an eccentricity of 0.84±0.08. We also report an
updated orbital fit of the white dwarf companion to the metal-poor
(but barium-rich) G9 V dwarf HD159062 based on new radial velocity
observations from the High-Resolution Spectrograph at the Hobby-Eberly
Telescope and astrometry from Keck/NIRC2. A joint fit of the available
relative astrometry, radial velocities, and tangential astrometric
acceleration yields a dynamical mass of
MB=0.609-0.011+0.010M☉ for HD159062B, a semimajor axis of
60-7+5au, and preference for circular orbits (e<0.42 at 95%
confidence). 12PscB and HD159062B join a small list of resolved
Sirius-like benchmark white dwarfs with precise dynamical mass
measurements which serve as valuable tests of white dwarf mass-radius
cooling models and probes of AGB wind accretion onto their
main-sequence companions.
Description:
Fifty radial velocity (RV) measurements of 12Psc were obtained with
the Tull Coude spectrograph at McDonald Observatory's 2.7m Harlan
J.Smith telescope between 2001 and 2020. All observations used the
1.2" slit, resulting in a resolving power of R∼60000.
HD159062 was monitored with High Resolution Spectrograph (HRS) at the
Hobby-Eberly Telescope (HET) between 2008 and 2014. HRS is a
fiber-fed echelle spectrograph located in the basement of the HET.
Sixty-four high signal-to-noise ratio (S/N) spectra were acquired with
the HET's flexible queue scheduling system with a resolving power of
R∼60000 between 4110Å and 7875Å.
Objects:
-----------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------
23 29 30.32 -01 02 09.2 12 Psc = * 12 Psc
17 30 16.43 +47 24 07.9 HD159062 = HD 159062
-----------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 25 50 Full Spectrograph Relative Radial Velocities of
12 Psc
table3.dat 25 64 HRS Relative Radial Velocities of HD 159062
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See also:
II/230 : TASS Mark III photometric survey (Richmond+, 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)
J/AJ/131/431 : Abundances of Galactic G dwarfs (Brewer+, 2006)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/725/331 : Astrometry in the Galactic Center (Yelda+, 2010)
J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)
J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)
J/A+A/537/A146 : Stellar models with rot. 0.8<M<120, Z=0.014 (Ekstrom+, 2012)
J/A+A/552/A27 : Stellar activity and kinematics of FGK stars (Murgas+, 2013)
J/A+A/556/A150 : SWEETCat I. Stellar parameters for host stars (Santos+, 2013)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/MNRAS/444/3517 : BCool survey of solar-type stars (Marsden+ 2014)
J/ApJS/216/7 : Planets Around Low-Mass Stars (PALMS). IV. (Bowler+, 2015)
J/ApJ/810/158 : M,L,T dwarfs fundamental parameters & SEDs (Filippazzo+, 2015)
J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)
J/ApJ/818/34 : Radial velocity monitoring of 5 FGK stars (Endl+, 2016)
J/ApJ/840/70 : Historical and HST Astrometry of Sirius A,B (Bond+, 2017)
J/AJ/153/208 : LCES HIRES/Keck RVel Exoplanet Survey (Butler+, 2017)
J/A+A/606/A94 : Chemical abundances of 1059 FGK stars (Delgado Mena+, 2017)
J/ApJS/231/15 : Astrometric monitoring of ultracool dwarf bin. (Dupuy+, 2017)
J/AJ/153/21 : Abundances in local region.II. F, G, & K dwarfs (Luck+, 2017)
J/AJ/154/200 : The nearby white dwarf/red dwarf pair 40 Eri BC (Mason+, 2017)
J/A+A/604/A108 : UniDAM results (Mints+, 2017)
J/A+A/614/A55 : Lithium abundance in dwarfs & subgiants (Aguilera-Gomez+,2018)
J/AJ/155/159 : RVs of the late-T dwarf GL 758 B host star (Bowler+, 2018)
J/A+A/616/A108 : Cool stars chromospheric activity catalog (Boro Saikia+, 2018)
J/A+A/615/A76 : Spectroscopic parameters of stars (SPECIES). I. (Soto+, 2018)
J/A+A/626/A128 : Main-sequence and subgiant Barium stars (Escorza+, 2019)
J/ApJ/871/63 : How to constrain M dwarf. II. Nearby binaries (Mann+, 2019)
J/A+A/639/A47 : SPHERE and NaCo images of HD 19467B (Maire+, 2020)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD [2452115/2459073] Barycentric Julian Date
15- 20 F6.2 m/s RVel [-98.9/119] Radial velocity
22- 25 F4.2 m/s e_RVel [3.6/8.5] Uncertainty in RVel
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD [2454698/2456507] Barycentric Julian Date
15- 20 F6.2 m/s RVel [-31/47.9] Radial velocity
22- 25 F4.2 m/s e_RVel [2.3/8.9] Uncertainty in RVel
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 16-Apr-2021