J/A+A/677/A162 Pleiades bonafide single stars (Brandner+, 2023)
Benchmarking Gaia DR3 APSIS with the Hyades and Pleiades open clusters.
Brandner W., Calissendorff P., Kopytova T.
<Astron. Astrophys. 677, A162 (2023)>
=2023A&A...677A.162B 2023A&A...677A.162B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, fundamental ; Stars, masses ; Optical
Keywords: open clusters and associations: individual: Hyades -
open clusters and associations: individual: Pleiades -
stars: abundances - stars: fundamental parameters -
Galaxy: stellar content - Hertzsprung-Russell and C-M diagrams
Abstract:
The Gaia astrophysical parameters inference system (Apsis) provides
astrophysical parameter estimates for several to hundreds of millions
of stars. Aims. We aim to benchmark Gaia DR3 Apsis.
We compiled approximately 1500 bona fide single stars in the Hyades
and Pleiades open clusters for validation of PARSEC isochrones, and
for comparison with Apsis estimates. PARSEC stellar isochrones in the
Gaia photometric system enable us to assign average ages and
metallicities to the clusters, and mass, effective temperature,
luminosity, and surface gravity to the individual stars.
Apsis does not recover the single-age, single-metallicity
characteristic of the cluster populations. Ages assigned to cluster
members seemingly follow the input template for Galactic populations,
with earlier-type stars being systematically assigned younger ages
than later-type stars. Cluster metallicities are underestimated by 0.1
to 0.2dex. Effective temperature estimates are in general reliable.
Surface gravity estimates reveal strong systematic errors for specific
ranges of the Gaia BP-RP colours.
We caution that Gaia DR3 Apsis estimates can be subject to
significant systematic uncertainties. Some of the Apsis estimates,
such as metallicity, might only be meaningful for statistical studies
of the time-averaged Galactic stellar population, but are not
recommended to be used for individual stars.
Description:
Astrophysical parameters of bona fide single stars in the Pleiades
open cluster.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 183 910 Astrophysical parameters of bona fide single
stars in the Pleiades open cluster
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See also:
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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4- 22 I19 --- GaiaDR3 Gaia DR3 source_id (1)
24- 33 F10.6 deg RAdeg Barycentric right ascension (ICRS)
at Ep=2016.0 (1)
35- 44 F10.6 deg DEdeg Barycentric declination (ICRS)
at Ep=2016.0 (1)
46- 52 F7.3 pc dpgeo Median photogeometric distance posterior (2)
54- 60 F7.3 pc b_dpgeo 16th quantile photogeometric distance
posterior (2)
62- 68 F7.3 pc B_dpgeo 84th quantile photogeometric distance
posterior (2)
71- 77 F7.4 mag Gmag Gaia G magnitude (1)
80- 85 F6.4 mag e_Gmag Gaia G magnitude uncertainty (1)
88- 94 F7.4 mag BPmag Gaia BP magnitude (1)
97-102 F6.4 mag e_BPmag Gaia BP magnitude uncertainty (1)
105-111 F7.4 mag RPmag Gaia RP magnitude (1)
114-119 F6.4 mag e_RPmag Gaia RP magnitude uncertainty (1)
122-127 F6.4 Msun Mass Mass (3)
130-135 F6.4 Msun e_Mass Mass uncertainty (3)
138-143 F6.4 [K] logT log Effective temperature (3)
146-151 F6.4 [K] e_logT log Effective temperature uncertainty (3)
153-159 F7.4 [Lsun] logL log Luminosity (3)
162-167 F6.4 [Lsun] e_logL log Luminosity uncertainty (3)
170-175 F6.4 [cm/s2] logg Surface gravity (3)
178-183 F6.4 [cm/s2] e_logg Surface gravity uncertainty (3)
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Note (1): according to Gaia DR3, Cat. I/355.
Note (2): photo-geometric distance posteriors are according to
Bailer-jones et al., 2021AJ....161..147B 2021AJ....161..147B, Cat. I/352.
Note (3): stellar astrophysical parameters are based on PARSEC 1.2S for
logAge[yr]=8.10±0.07, [M/H]=+0.13±0.03, Av=0.12mag
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Acknowledgements:
Wolfgang Brandner, brandner(at)mpia.de
(End) Wolfgang Brandner [MPIA, Germany], Patricia Vannier [CDS] 14-Jul-2023