J/ApJS/254/42 Hipparcos-Gaia (EDR3) Catalog of Accelerations (Brandt, 2021)
The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 edition.
Brandt T.D.
<Astrophys. J. Suppl. Ser., 254, 42-42 (2021)>
=2021ApJS..254...42B 2021ApJS..254...42B (SIMBAD/NED BibCode)
ADC_Keywords: Proper motions; Positional data; Stars, double and multiple;
Radial velocities; Parallaxes, trigonometric
Keywords: Astrometry; Astrometric exoplanet detection; Astrometric binary stars
Abstract:
We present a cross-calibration of Hipparcos and Gaia EDR3 intended to
identify astrometrically accelerating stars and to fit orbits to stars
with faint, massive companions. The resulting catalog, the EDR3
edition of the Hipparcos-Gaia Catalog of Accelerations (HGCA),
provides three proper motions with calibrated uncertainties on the
EDR3 reference frame: the Hipparcos proper motion, the Gaia EDR3
proper motion, and the long-term proper motion given by the difference
in position between Hipparcos and Gaia EDR3. Our approach is similar
to that for the Gaia DR2 edition of the HGCA but offers a factor of
∼3 improvement in precision thanks to the longer time baseline and
improved data processing of Gaia EDR3. We again find that a 60/40
mixture of the two Hipparcos reductions outperforms either reduction
individually, and we find strong evidence for locally variable frame
rotations between all pairs of proper motion measurements. The
substantial global frame rotation seen in DR2 proper motions has been
removed in EDR3. We also correct for color- and magnitude-dependent
frame rotations at a level of up to ∼50µas/yr in Gaia EDR3. We
calibrate the Gaia EDR3 uncertainties using a sample of radial
velocity standard stars without binary companions; we find an error
inflation factor (a ratio of total to formal uncertainty) of 1.37.
This is substantially lower than the position-dependent factor of
∼1.7 found for Gaia DR2 and reflects the improved data processing in
EDR3. While the catalog should be used with caution, its proper motion
residuals provide a powerful tool to measure the masses and orbits of
faint, massive companions to nearby stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 314 115346 The Hipparcos-Gaia Catalog of Accelerations (HGCA),
Gaia EDR3 edition
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Description of file:
HGCA_vEDR3.fits (available on the FTP) is the original catalog in
FITS format.
See also:
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
V/137 : Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/354 : HIP and TGAS stars reddening and extinction (Gontcharov+ 2018)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/MNRAS/458/3272 : Accurate SB2 radial velocities (Kiefer+, 2016)
J/AJ/153/208 : LCES HIRES/Keck RVel Exoplanet Survey (Butler+, 2017)
J/A+A/623/A72 : Binarity of HIP stars from Gaia pm anomaly (Kervella+, 2019)
J/A+A/631/A145 : HIP stars DEC proper motions comparison (Damljanovic+, 2019)
J/MNRAS/484/L8 : HIRES/Keck RVs systematic errors (Tal-Or+, 2019)
J/A+A/640/A73 : pi Men radial velocity curves (De Rosa+, 2020)
J/A+A/639/A47 : SPHERE and NaCo images of HD 19467B (Maire+, 2020)
J/A+A/636/A74 : HARPS radial velocity database (Trifonov+, 2020)
J/AN/341/770 : Corrected proper motion for HIP stars (Damljanovic, 2020)
J/AJ/161/106 : Radial velocities of 12 Psc and HD 159062 (Bowler+, 2021)
J/AJ/161/179 : Predicted positions of βPictoris b and c (Brandt+, 2021)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [1/120404] Hipparcos number (hip_id)
8- 26 I19 --- Gaia Gaia EDR3 identifier (gaiasourceid)
28- 42 F15.11 deg RAdeg Gaia EDR3 Barycentric right ascension
of the source (ICRS) at Ep=EpochRAgaia
(gaia_ra)
44- 58 F15.11 deg DEdeg Gaia EDR3 Barycentric declination of
the source (ICRS) at Ep=EpochDEgaia
(gaia_dec)
60- 67 F8.3 km/s RV [-589/587]? Measured radial velocity
(radial_velocity)
69- 75 F7.3 km/s e_RV [0/999]? RV standard error
(radialvelocityerror)
77- 84 A8 --- r_RV Source of RV (radialvelocitysource)
(1)
86- 93 F8.4 mas plx [0.1/769] Gaia EDR3 parallax
(parallax_gaia)
95- 100 F6.4 mas e_plx [0.008/1.6] plx standard error
(parallaxgaiaerror)
102- 110 F9.3 mas/yr pmRA [-4407/6766] Gaia EDR3 proper motion in
right ascension direction (pmRA*cosDE)
(pmra_gaia)
112- 120 F9.3 mas/yr pmDE [-5818/10363] Gaia EDR3 proper motion
in declination direction (pmdec_gaia)
122- 126 F5.3 mas/yr e_pmRA [0.007/2.1] Calibrated uncertainty in
pmRA (pmragaiaerror)
128- 132 F5.3 mas/yr e_pmDE [0.009/2] Calibrated uncertainty in
pmDE (pmdecgaiaerror)
134- 140 F7.4 --- pmRApmDEcor [-0.98/0.9] Correlation between pmRA
and pmDE (pmrapmdecgaia)
142- 150 F9.3 mas/yr pmRAhg [-4407/6766] Calibrated proper motion
in RA from the Hipparcos-Gaia
positional difference (pmra_hg)
152- 160 F9.3 mas/yr pmDEhg [-5818/10363] Calibrated proper motion
in DEC from the Hipparcos-Gaia
positional difference (pmdec_hg)
162- 168 F7.3 mas/yr e_pmRAhg [0.008/583] Calibrated uncertainty in
pmRAhg (pmrahgerror)
170- 175 F6.3 mas/yr e_pmDEhg [0.008/57] Calibrated uncertainty in
pmDEhg (pmdechgerror)
177- 183 F7.4 --- pmRApmDEhg [-0.99/1] Correlation between pmRAhg
and pmDEhg (pmrapmdechg)
185- 193 F9.3 mas/yr pmRAhip [-4408/6767] Calibrated proper motion
in RA from the composite Hipparcos
catalog (pmra_hip)
195- 203 F9.3 mas/yr pmDEhip [-5819/10360] Calibrated proper motion
in DEC from the composite Hipparcos
catalog (pmdec_hip)
205- 212 F8.3 mas/yr e_pmRAhip [0.2/2270] Calibrated uncertainty in
pmRAhip (pmrahiperror)
214- 220 F7.3 mas/yr e_pmDEhip [0.2/114] Calibrated uncertainty in
pmDEhip (pmdechiperror)
222- 228 F7.4 --- pmRApmDEhip [-0.95/0.99] Correlation between
pmRAhip and pmDEhip (pmrapmdechip)
230- 235 F6.1 yr EpochRAgaia [2015.1/2017.1] Central epoch of Gaia
EDR3 RA measurement (epochragaia)
237- 242 F6.1 yr EpochDEgaia [2015/2017.2] Central epoch of Gaia
EDR3 DEC measurement (epochdecgaia)
244- 249 F6.1 yr EpochRAhip [1990.4/1992.4] Central epoch of
Hipparcos RA measurement (epochrahip)
251- 256 F6.1 yr EpochDEhip [1990.3/1992.4] Central epoch of
Hipparcos DEC measurement
(epochdechip)
258- 264 F7.4 mas/yr pmRAhipcross [-1.37/1.51] Difference in pmRAhip from
the catalog-computed value:
ξα*,H (crosscalpmrahip)
266- 272 F7.4 mas/yr pmDEhipcross [-1.16/1.6] Difference in pmDEhip from
the catalog-computed value:
ξδ,H (crosscalpmdechip)
274- 280 F7.4 mas/yr pmRAhgcross [-0.052/0.062] Difference in pmRAhg
from the catalog-computed value:
ξα*,HG (crosscalpmrahg)
282- 288 F7.4 mas/yr pmDEhgcross [-0.06/0.06] Difference in pmDEhg from
the catalog-computed value:
ξδ,HG (crosscalpmdechg)
290- 296 F7.4 mas/yr dpmRA [-8/2.7] Correction to pmRAhg from
projecting linear motion onto the
celestial sphere: γα*
from Table 2 (nonlinear_dpmra)
298- 304 F7.4 mas/yr dpmDE [-4.2/16.1] Correction to pmDEhg from
projecting linear motion onto the
celestial sphere: γδ from
Table 2 (nonlinear_dpmdec)
306- 314 E9.4 --- chi2 [3.1e-05/367600] χ2 value for a
model of constant proper motion with 2
degrees of freedom (chisq)
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Note (1): Source of measured radial velocity: Gaia_DR2 (I/345) or "None".
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History:
From electronic version of the journal
References:
Brandt T.D. HIP-Gaia DR2 2018ApJS..239...31B 2018ApJS..239...31B
(End) Emmanuelle Perret [CDS] 02-Sep-2021