J/A+A/699/A100 Exoplanets and host stars Gaia spect. cat. (de Laverny+, 2025)
The Gaia spectroscopic catalogue of exoplanets and host stars.
de Laverny P., Ligi R., Crida A., Recio-Blanco A., Palicio P.A.
<Astron. Astrophys. 699, A100 (2025)>
=2025A&A...699A.100D 2025A&A...699A.100D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Binaries, orbits ;
Abundances ; Stars, masses
Keywords: planets and satellites: fundamental parameters -
planets and satellites: terrestrial planets - stars: abundances -
stars: fundamental parameters - Galaxy: general
Abstract:
Complete, accurate, and precise catalogues of exoplanet host star
(EHS) properties are essential to derive high-quality
exoplanet parameters, and, thus, to study individual planets, planet
populations, planet formation, and their Galactic context.
This article aims at homogeneously parameterising EHS and their
exoplanets, selected from the Encyclopedia of Exoplanetary
Systems and the NASA Exoplanets Archive, thanks to Gaia astrometric,
photometric and GSP-Spec spectroscopic data, complemented by some
ground-based spectroscopic survey information.
From the atmospheric parameters of 2573 EHS, we computed their
luminosity, radius, and mass, with no prior assumption from stellar
evolution models. Their Galactic positions, kinematic and orbital
properties are also derived. We then re-scale the mass and radius of
3556 exoplanets, fully consistently with the stellar data (when
available).
The Gaia spectroscopic stellar effective temperatures, luminosities
and radii rather well agree with literature values but are more
precise. In particular, stellar radii are derived with typically less
than 3% uncertainty (instead of ∼8% in the literature); this reduces
significantly the uncertainty on the planetary radii and allows a
finer analysis of the decrease of planet number around 1.8R⊕
(evaporation valley). Larger differences are however found for the
masses that are more difficult to estimate by any methods. The EHS
population is rather diverse in chemical and Galactic properties,
although they are all found in the Solar vicinity, close to the Local
spiral arm. Most EHS belong to the thin disc but some older thick disc
and halo members are also identified. For the less massive planets
(log(Mp/MJup)≲-0.6), the average planet radius increases with the
metallicity of the host star. For giant planets, a dichotomy between
dense and inflated planets is found. Denser planets (Rp≲1.1RJup)
tend to be more massive as the metallicity of the host star increases,
while inflated planets are more massive for less metallic hosts. If
confirmed, this bimodality implies that the diversity of giant
exoplanets depends on their Galactic birth locus, with dense giant
planets being more numerous than inflated ones when [M/H] is higher
than ∼1.5 times Solar, as in the central Milky Way regions.
The Gaia spectroscopic catalogue of exoplanets and their host stars is
large, homogeneous, and precise. It thus should be a valuable
added-value for planetary studies. Since it is based on literature
data, it could also easily be updated thanks to future Gaia data
releases and other space and ground-based surveys.
Description:
We have built a new large homogeneous catalogue of 3556 exoplanets and
2573 exoplanet host stars properties, called the Gaia spectroscopic
catalogue. The stellar atmospheric and chemical properties, namely,
metallicity and enrichment in alpha-elements with respect to iron, come
from the Gaia GSP-Spec spectroscopic stellar parameters catalogue,
complemented with data from ground-based spectroscopic surveys.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 600 2573 Gaia spectroscopic catalogue of Exoplanet Host Stars
table2.dat 296 3556 Gaia spectroscopic catalogue of exoplanet properties
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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- 43 A23 --- Name Stellar name in the exoplanet host star
databases
45 I1 --- Nexopl [1/7] Number of detected exoplanets
47 I1 --- SpecSurvey [1/4] Spectroscopic surveys (1)
49- 58 F10.4 K Teff ? Exoplanet host star effective temperature
60- 71 F12.7 K e_Teff ? rms uncertainty on Teff
73- 91 F19.16 [cm/s2] logg ? Exoplanet host star surface gravity
93-111 F19.16 [cm/s2] e_logg ? rms uncertainty on logg
113-135 F23.20 [-] Met ? Exoplanet host star mean metallicity
137-155 F19.16 [-] e_Met ? rms uncertainty on Met
157-180 E24.17 [-] [alpha/Fe] ? Exoplanet host star enrichment
182-200 F19.16 [-] e_[alpha/Fe] ? rms uncertainty on [alpha/Fe]
202-223 E22.16 mag AG ? Absorption in the G-band
225-247 E23.17 mag e_AG ? rms uncertainty on AG
249-270 F22.16 Lsun Lum ? Exoplanet host star luminosity
272-295 F24.20 Lsun e_Lum ? rms uncertainty on Lum
297-316 F20.16 Rsun Rad ? Exoplanet host star radius
318-339 F22.19 Rsun e_Rad ? rms uncertainty on Rad
341-359 F19.16 Msun Mass ? Exoplanet host star mass
361-381 F21.18 Msun e_Mass ? rms uncertainty on Mass
383-406 E24.17 kpc X ? X Galactocentric Cartesian coordinate
408-426 F19.16 kpc Y ? Y Galactocentric Cartesian coordinate
428-442 E15.8 kpc Z ? Z Galactocentric Cartesian coordinate
444-466 F23.18 km/s VR ? Galactocentric radial velocity
468-486 F19.14 km/s Vphi ? Azimuthal Galactic velocity
488-510 F23.18 km/s VZ ? Galactocentric vertical velocity
512-533 E22.16 km/s Zmax ? Maximum absolute distance to the
Galactic plane
535-553 F19.16 km/s Rperi ? Orbital pericenter radius
555-573 F19.15 km/s Rapo ? Orbital apocenter radius
575-596 F22.19 --- ecc ? Orbital eccentricity
598 I1 --- FlagParam [0/9]? Quality flag associated to the
exoplanet host star parameterisation (2)
600 I1 --- FlagAbs [0/9]? Quality flag associated to
absorption estimate(3)
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Note (1): Spectroscopic surveys as follows:
1 = GSP-Spec
2 = APOGEE
3 = GALAH
4 = GES
Note (2): Quality flag associated to the exoplanet host star parameterisation
as follows:
0 = hight quality
1 = good quality
2 = low quality
9 = no Teff available
Note (3): Quality flag associated to absorption estimate as follows:
0 = high quality
1 = godd quality
9 = LMR filtered
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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- 19 I19 --- GaiaDR3 Gaia DR3 Identification
21- 45 A25 --- Planet Planet name in the EHS databases
47- 69 F23.19 Mjup Mpsini ? Planetary minimum mass (Mp*sini)
71- 92 E22.16 Mjup e_Mpsini ? Associated uncertainty to Mpsini
94-114 F21.18 Rjup Rp ? Planetary radius
116-137 F22.19 Rjup e_Rp ? Associated uncertainty to Rp
139-163 F25.18 AU a ? Rescaled semi-major axis
165-186 E22.16 AU e_a ? rms uncertainty on a
188-197 F10.3 m/s K ? RV semi-amplitude from Exoplanet catalog
199-223 F25.19 m/s e_K ? rms uncertainty on K
225-230 E6.1 --- e ? Eccentricity from Exoplanet catalog
232-239 F8.3 deg i ? Inclination of the system from Exoplanet
catalog
241-248 F8.5 % TD ? Transit depth from Exoplanet catalog
250-272 F23.20 % e_TD ? rms uncertainty on TD
274-294 F21.9 d P ? Orbital period from Exoplanet catalog
296 I1 --- Flagsource [0/9]? Source of planetary parameters and
compatibility between the tables (1)
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Note (1): Flag as follows:
0 = NASA Exoplanets Archive (NEA) compatible with EEs (2834 planets)
1 = NASA Exoplanets Archive (NEA) only (121 planets)
2 = Encyclopedia of Exoplanetary Systems (EES) only (367 planets)
3 = NASA Exoplanets Archive (NEA) not compatible with Encyclopedia of
Exoplanetary Systems (EES) (28 planets)
9 = inconsistency within the tables (206 planets)
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Acknowledgements:
Patrick de Laverny, patrick.de_laverny(at)oca.eu
(End) Patricia Vannier [CDS] 22-May-2025