J/AJ/166/27 Radial velocity follow up of 14 Her system (Benedict+, 2023)
The 14 Her Planetary System: Companion Masses and Architecture from Radial
Velocities and Astrometry.
Benedict G.F., McArthur B.E., Nelan E.P., Bean J.L.
<Astron. J., 166, 27 (2023)>
=2023AJ....166...27B 2023AJ....166...27B
ADC_Keywords: Stars, double and multiple; Spectra, optical; Radial velocities;
Positional data
Keywords: Exoplanets
Abstract:
We combine Hubble Space Telescope (HST) Fine Guidance Sensor,
Hipparcos, and Gaia DR3 astrometric observations of the K0V star 14
Her with the results of an analysis of extensive ground-based radial
velocity data to determine perturbation orbits and masses for two
previously known companions, 14Herb and c. Radial velocities obtained
with the Hobby-Eberly Telescope and from the literature now span over
25 years. With these data we obtain improved radial velocity (RV)
orbital elements for both the inner companion, 14Herb and the
long-period outer companion, 14 Her c. We also find evidence of an
additional RV signal with P=3789d. We then model astrometry from
Hipparcos, HST, and Gaia with RV results to obtain system parallax and
proper motion, perturbation periods, inclinations, and sizes due to
14Herb and c. We find Pb=1767.6±0.2days, perturbation semimajor
axis αb=1.3±0.1mas, and inclination ib=36°±3°,
Pc=52160±1028days, perturbation semimajor axis
αc=10.3±0.7mas, and inclination ic=82°±14°. In
agreement with a past investigation, the 14Herb, c orbits exhibit
significant mutual inclination. Assuming a primary mass
M*=0.98±0.04M☉, we obtain companion masses
Mb=8.5-0.8+1.0M{Jup}, and Mc=7.1-0.6+1.0M{Jup}.
Description:
Radial velocity data include previously published ELODIE, the
Automated Planet Finder (APF) at Lick Observatory, and Keck HIRES. The
Hobby-Eberly Telescope High Resolution Spectrograph provided
previously unpublished measurements.
Objects:
--------------------------------------------------------
RA (2000) DE Designation(s (Period)
--------------------------------------------------------
16 10 24.31 +43 49 03.5 14 Her = * 14 Her (P=3789d)
--------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 26 685 Radial velocity data
table7.dat 100 407 14 Her field astrometry
--------------------------------------------------------------------------------
See also:
III/159 : Ca II H and K Measurements Made at MWO (Duncan+ 1991)
J/A+A/414/351 : ELODIE survey northern extrasolar planets III (Naef+, 2004)
J/ApJ/636/1020 : kappa Peg astrometry & radial velocities (Muterspaugh+, 2006)
J/ApJ/654/625 : Radial velocities of 9 long-period objects (Wittenmyer+, 2007)
J/AJ/138/312 : Activity of bright solar analogs (Hall+, 2009)
J/ApJ/693/1084 : Ten new and updated multiplanet systems (Wright+, 2009)
J/ApJ/715/1203 : υ Andromedae system with HST (McArthur+, 2010)
J/AJ/142/187 : HST observations of 7 Pop.II variable stars (Benedict+, 2011)
J/ApJ/768/155 : Radial velocities & photometry HD 38529 system (Henry+, 2013)
J/ApJ/795/41 : HD 128311 radial velocity & astrometric data (McArthur+, 2014)
J/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfs (Benedict+, 2016)
J/AJ/153/258 : 2007.5 to 2010.4 HST astrometry of HD 202206 (Benedict+, 2017)
J/ApJ/835/25 : Calibrated solar S-index time series (Egeland+, 2017)
J/ApJS/254/42 : Hipparcos-Gaia (EDR3) Catalog of Accelerations (Brandt, 2021)
J/AJ/161/134 : Survey of stellar & planetary comp within 25pc (Hirsch+, 2021)
J/A+A/649/A141 : 1000-year sunspot series (Usoskin+, 2021)
J/AJ/163/282 : Radial velocity follow up of η Aquilae (Benedict+, 2022)
J/AJ/163/295 : Radial velocity and astrometry for µ Arae (Benedict+, 2022)
J/ApJS/262/21 : 3-D selection of 167 sub-stellar companions (Feng+, 2022)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d MJD [49752/58906] Modified Julian Date; JD-2400000.5
12- 16 F5.1 m/s RVel [-49/211] Radial Velocity
18- 21 F4.1 m/s e_RVel [2/27] Uncertainty in RVel (1)
23- 26 A4 -- r_RVel Radial Velocity references (2)
--------------------------------------------------------------------------------
Note (1): Errors adjusted to achieve χ2/DOF near unity.
Note (2): References as follows:
HET = this paper
ESO = Naef+, 2004A+A...f414..351N
Keck = Butler+, 2003ApJ...582..455B 2003ApJ...582..455B
Wittenmyer+, 2007, J/ApJ/654/625
Hirsch+, 2021, J/AJ/161/134
Rosenthal+, 2021ApJS..255....8R 2021ApJS..255....8R
APF = Vogt+, 2014PASP..126..359V 2014PASP..126..359V
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 -- Set [1/18] Set (orbit) number
4- 5 I2 -- Star [5/65] Star identifier
7- 15 A9 -- ID Archive identifier
17- 23 F7.3 deg PA [0/278] Field roll
25- 37 F13.8 arcsec oRA [-340/438] OFAD-corrected FGS x position
39- 50 F12.7 arcsec oDE [-203/404] OFAD-corrected FGS y position
52- 59 E8.2 arcsec e_oRA [9e-06/0.006] Uncertainty in oRA
61- 68 E8.2 arcsec e_oDE [9e-06/0.006] Uncertainty in oDE
70- 80 F11.5 d MJD [48347/57389] Modified Julian Date; JD-2400000.5
82- 90 F9.6 -- plxRA [-0.467/1.35] Parallax factor in RA
92-100 F9.6 -- plxDE [-0.854/0.302] Parallax factor in DEC
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 02-Feb-2024