J/A+A/663/A161 187 FGK planet host stars parameters (Magrini+, 2022)
Ariel stellar characterisation:
I. Homogeneous stellar parameters of 187 FGK planet host stars.
Description and validation of the method.
Magrini L., Danielski C., Bossini D., Rainer M., Turrini D., Benatti S.,
Brucalassi A., Tsantaki M., Delgado Mena E., Sanna N., Biazzo K.,
Campante T.L., Van der Swaelmen M., Sousa S.G., Helminiak K.G.,
Neitzel A.W., Adibekyan V., Bruno G., Casali G.
<Astron. Astrophys. 663, A161 (2022)>
=2022A&A...663A.161M 2022A&A...663A.161M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Stars, masses ;
Effective temperatures ; Abundances ; Space velocities ;
Stars, distances ; Optical
Keywords: method: data analysis - techniques: spectroscopy - catalogs -
planetary systems - stars: atmospheres - stars: fundamental parameters
Abstract:
In 2020 the European Space Agency selected Ariel as the next mission
to join the space fleet of observatories to study planets outside our
Solar System. Ariel will be devoted to the characterisation of a
thousand planetary atmospheres, for understanding what exoplanets are
made of, how they formed and how they evolve. To achieve the last two
goals all planets need to be studied within the context of their own
host stars, which in turn have to be analysed with the same technique,
in a uniform way. We present the spectro- photometric method we have
developed to infer the atmospheric parameters of the known host stars
in the Tier 1 of the Ariel Reference Sample. Our method is based on an
iterative approach, which combines spectral analysis, the
determination of the surface gravity from Gaia data, and the
determination of stellar masses from isochrone fitting. We validated
our approach with the analysis of a control sample, composed by
members of three open clusters with well-known ages and metallicities.
We measured effective temperature, Teff, surface gravity, logg, and
the metallicity, [Fe/H], of 187 F-G-K stars within the Ariel Reference
Sample. We presented the general properties of the sample, including
their kinematics which allows us to separate them between thin and
thick disc populations. A homogeneous determination of the parameters
of the host stars is fundamental in the study of the stars themselves
and their planetary systems. Our analysis systematically improves
agreement with theoretical models and decreases uncertainties in the
mass estimate (from 0.21±0.30 to 0.10±0.02M☉), providing
useful data for the Ariel consortium and the astronomical community at
large.
Description:
Homogeneous determination of stellar parameters of Ariel target FGK
stars from archival and propertary data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 88 187 Stellar properties of the 187 sample stars
tablea2.dat 71 186 *Orbital properties of the 186 sample stars
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Note on tablea2.dat: Orbits are computed with galpy: A Python Library for
Galactic Dynamics, Bovy (2015ApJS..216...29B 2015ApJS..216...29B).
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Identification of the star
12- 15 F4.2 Msun Mass Stellar mass
17- 20 F4.2 Msun b_Mass Stellar mass lower limit
22- 25 F4.2 Msun B_Mass Stellar mass upper limit
27- 30 F4.2 mag BCK Bolometric correction in 2MASS K band
32- 35 F4.2 mag e_BCK Error on bolometric correction
in 2MASS K band
37- 40 I4 K Teff Effective temperature
42- 44 I3 K e_Teff Error on the effective temperature
46- 49 F4.2 [cm/s2] logg Surface gravity
51- 54 F4.2 [cm/s2] e_logg Error on the surface gravity
56- 60 F5.2 [Sun] [Fe/H] Iron abundance, by number, with respect to
the Solar value
62- 65 F4.2 [Sun] e_[Fe/H]p Errors on [Fe/H], due to the uncertainties
on stellar parameters
67- 70 F4.2 [Sun] e_[Fe/H]l Errors on [Fe/H], due to the line-by-line
scatter
72- 75 F4.2 km/s xi Microturbulent velocity
77- 80 F4.2 km/s e_xi Error on the microturbulent velocity
82 I1 --- f_xi [0/1] Flag on the microturbulent velocity,
(0 derived, 1 assumed)
84- 88 A5 --- S Reference for the spectra
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Identification of the star
12- 18 F7.3 km/s U U velocity component
20- 26 F7.3 km/s V V velocity component
28- 34 F7.3 km/s W W velocity component
36- 40 F5.3 kpc RGC Galactocentric radius
42- 47 F6.3 kpc Rapo Apogalacticon radius
49- 53 F5.3 kpc Rperi Perigalacticon radius
55- 58 F4.2 --- e Orbit eccentricity
60- 64 F5.3 pc Zmax Maximum height above the Galactic Plane
66- 71 F6.1 pc d Distance to the Sun
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Acknowledgements:
Laura Magrini, laura.magrini(at)inaf.it
(End) Patricia Vannier [CDS] 19-Apr-2022