J/AJ/163/295 Radial velocity and astrometry for µ Arae (Benedict+, 2022)
The µ Arae Planetary System; Radial Velocities and Astrometry
Benedict G.F., McArthur B.E., Nelan E.P., Wittenmyer R., Barnes R.,
Smotherman H., Horner J.
<Astron. J., 163, 295 (2022)>
=2022AJ....163..295B 2022AJ....163..295B
ADC_Keywords: Exoplanets; Stars, high-velocity; Spectra, optical;
Radial velocities; Positional data; Parallaxes, trigonometric
Keywords: Exoplanets
Abstract:
With Hubble Space Telescope Fine Guidance Sensor astrometry and
published and previously unpublished radial velocity measures, we
explore the exoplanetary system µArae. Our modeling of the radial
velocities results in improved orbital elements for the four
previously known components. Our astrometry contains no evidence for
any known companion but provides upper limits for three companion
masses. A final summary of all past Fine Guidance Sensor exoplanet
astrometry results uncovers a bias toward small inclinations (more
face-on than edge-on). This bias remains unexplained by small number
statistics, modeling technique, Fine Guidance Sensor mechanical
issues, or orbit modeling of noise-dominated data. A numerical
analysis using our refined orbital elements suggests that planet d
renders the µArae system dynamically unstable on a timescale of
105yr, in broad agreement with previous work.
Description:
We take the CORALIE radial velocities (RVs) from Pepe+,2007A&A...462..769P 2007A&A...462..769P.
To these we add new publicly available data from the High Accuracy
Radial velocity Planet Searcher (HARPS) spectrograph on the 3.6m ESO
telescope at La Silla. We also include 180 RV measurements from the
UCLES spectrograph on the 3.9m Anglo-Australian Telescope, gathered as
part of the 18yr Anglo-Australian Planet Search program.
For this study astrometric measurements came from Fine Guidance Sensor
1r (FGS 1r), an upgraded FGS installed in 1997 during the second
Hubble Space Telescope (HST) servicing mission.
Objects:
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RA (2000) DE Designation(s)
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17 44 08.70 -51 50 02.6 µ Arae = * mu. Ara
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 28 380 Radial velocities
table5.dat 91 715 µ Arae field astrometry
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See also:
J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)
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/A+A/527/A140 : Mass limits on substellar companions (Reffert+, 2011)
J/ApJ/795/41 : HD128311 radial velocity & astrometric data (McArthur+, 2014)
J/A+A/575/A18 : Revising the ages of planet-hosting stars (Bonfanti+, 2015)
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/A+A/605/A72 : Planetary systems AMD-stability (Laskar+, 2017)
J/AJ/155/126 : Radial velocities & photometry of Kdwarf HD26965 (Diaz+, 2018)
J/A+A/615/A76 : Spectroscopic parameters of stars (SPECIES). I. (Soto+, 2018)
J/A+A/636/A74 : HARPS radial velocity database (Trifonov+, 2020)
J/AJ/161/285 : Absorption & emission lines & RVel for vA351 (Benedict+, 2021)
J/ApJS/254/42 : Hipparcos-Gaia (EDR3) Catalog of Accelerations (Brandt, 2021)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [11/15] Radial Velocity reference (1)
4- 13 F10.4 d JD [50915/57233] Julian Date; JD-2400000.0
15- 21 F7.4 km/s RVel [-9.42/0.07] Radial Velocity
23- 28 F6.4 km/s e_RVel [0.0001/0.02] Uncertainty in RVel
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Note (1): References as follows:
11 = HARPS1; Pepe+, 2007A&A...462..769P 2007A&A...462..769P
12 = CORALIE; Pepe+, 2007A&A...462..769P 2007A&A...462..769P
14 = AAT; Tinney+, 2001ApJ...551..507T 2001ApJ...551..507T, Wittenmyer+, 2014ApJ...783..103W 2014ApJ...783..103W,
2017AJ....153..167W 2017AJ....153..167W and this paper
15 = HARPS2; Lo Curto+, 2015Msngr.162....9L 2015Msngr.162....9L
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq [1/36] Set (orbit) number
4- 5 I2 --- Name [3/27] Star identifier; 3 = µ Arae
7- 15 A9 --- HST HST archive ID
17- 22 F6.2 deg PA [0/286] HST V3 position angle
24- 33 F10.5 arcsec RA [-233/130] OFAD-corrected FGS x position
35- 44 F10.5 arcsec DE [-113/105] OFAD-corrected FGS y position
46- 52 F7.5 arcsec e_RA [0.001/0.009] Uncertainty in oRA
54- 60 F7.5 arcsec e_DE [0.0009/0.009] Uncertainty in oDE
62- 71 F10.4 d JD [54289/55332] Time of observation; JD-2400000.5
73- 81 F9.6 --- plxRA [-1.63/1.62] Parallax factor in RA
83- 91 F9.6 --- plxDE [-0.47/0.35] Parallax factor in DEC
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 10-Oct-2022