J/A+A/711/A54 Gaia GSP-Spec catalogue (de Laverny+, 2026)
The Gaia GSP-Spec catalogue of interstellar extinctions, and stellar
luminosities, radii and masses.
de Laverny P., Recio-Blanco A., Navarrete C., Palicio P.A., Spitoni E.
<Astron. Astrophys. 711, A54 (2026)>
=2026A&A...711A..54D 2026A&A...711A..54D (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Reddening ; Stars, diameters ; Stars, masses ; Optical
Keywords: techniques: spectroscopic - catalogs - stars: fundamental parameters -
stars: luminosity function, mass function - dust, extinction -
Galaxy: stellar content
Abstract:
The Gaia/DR3 GSP-Spec module has published the atmospheric parameters
of up to 5.6 million stars, thanks to the analysis of their Radial
Velocity Spectrometer spectra. By combining these spectroscopic
parameters with Gaia parallax and photometric measurements, a large
catalogue of interstellar colour excesses and extinctions,
complemented with stellar luminosities, radii and masses is
constructed, without relying on any stellar evolution or structure
models. This catalogue also contains their associated uncertainties
estimated from Monte-Carlo realisations, for about 4.6 million stars.
A system of quality flags based on the GSP-Spec quality parameters,
the achieved numerical precision, and the Gaia astrometric quality is
presented. Adopting these flags, we defined a sub-sample of
high-accuracy and precision parameters of more than 1.5 million stars.
The impact of possible GSP-Spec parameter inaccuracies on the derived
extinctions, luminosities, radii and masses are also explored,
revealing that the mass is the most affected quantity. The validations
of the radii and masses, by comparison with interferometric and
asteroseismic data, confirm their high-quality, even when the targets
suffer from large interstellar extinction. We also emphasize that they
are fully compatible and homogeneous with the GSP-Spec parameters.
This allows to avoid systematics and biases that could be hidden when
combining data from different (and potentially) heterogeneous
catalogues. Some example applications of this catalogue are finally
presented: (i) exoplanet radii and masses, (ii) present day mass
distribution functions, (iii) identification of Galactic populations
from their mass distribution, and (iv) Galactic halo accreted star
luminosities and masses confirming their merger epochs.
Description:
Content of the Gaia GSP-Spec catalogue of interstellar reddening,
extinctions, stellar luminosities, radii and masses.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 248 4604524 Gaia GSP-Spec catalogue of interstellar extinctions,
and stellar luminosities, radii and masses
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See also:
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia DR3 Identification
21- 24 I4 K Teff Adopted effective temperature
26- 31 F6.1 K e_Teff Teff uncertainty
33- 43 F11.9 [cm/s2] logg Adopted surface gravity
45- 56 F12.10 [cm/s2] e_logg logg uncertainty
58- 69 F12.9 [-] Meta Adopted metallicity
71- 82 F12.10 [-] e_Meta Metallicity uncertainty
84- 95 F12.9 --- [alpha/Fe] ?=- Adopted enhancement in alpha-elts
w.r.t. Fe
97-108 F12.10 --- e_[alpha/Fe] ?=- [alpha/Fe] uncertainty
110-124 F15.9 mag E(Bp-Rp) Colour excess in (BP-RP)
126-137 F12.10 mag e_E(Bp-Rp) E(BP-RP) uncertainty
139-150 F12.9 mag AG Extinction in the G-band
152-163 F12.10 mag e_AG AG uncertainty
165-176 E12.6 Lsun Lum ?=- Stellar luminosity
178-189 E12.6 Lsun e_Lum ?=- Luminosity uncertainty
191-201 F11.6 Rsun Rad ?=- Stellar radius
203-214 F12.7 Rsun e_Rad ?=- Radius uncertainty
216-227 F12.8 Msun Mass ?=- Stellar mass
229-242 F14.9 Msun e_Mass ?=- Mass uncertainty
244 I1 --- FlagParam [0/2] QF associated to the GSP-Spec
parameters (1)
246 I1 --- FlagExt [0/2] QF associated to the extinction
calculation (1)
248 I1 --- FlagLRM [0/9] QF associated to the L, R, and M
derivation (1)
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Note (1): QF as follows:
0 = High-Quality
1 = Good-Quality
2 = Moderate-Quality
9 = Low-Quality astrometric parameters and/or LRM filtered out (see text)
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Acknowledgements:
Patrick de Laverny, patrick.de_laverny(at)oca.eu
License: CC-BY-4.0
(End) Patricia Vannier [CDS] 18-May-2026