J/A+A/697/A102 Fast rotators and new FGK stars (Tsantaki+, 2025)
Ariel stellar characterisation.
III. Fast rotators and new FGK stars in the Ariel mission candidate sample.
Tsantaki M., Magrini L., Danielski C., Bossini D., Turrini D., Moedas N.,
Folsom C.P., Ramler H., Biazzo K., Campante T.L., Delgado-Mena E.,
da Silva R., Sousa S.G., Benatti S., Casali G., Helminiak K.G., Rainer M.,
Sanna N.
<Astron. Astrophys. 697, A102 (2025)>
=2025A&A...697A.102T 2025A&A...697A.102T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Stars, masses ;
Effective temperatures ; Abundances ; Space velocities ;
Stars, distances ; Optical
Keywords: methods: data analysis - techniques: spectroscopic - catalogs -
stars: atmospheres - stars: fundamental parameters - planetary systems
Abstract:
The next mission dedicated to the study of planetary atmospheres is
the Ariel space mission, planned for launch in 2029, which will
observe a variety of planetary systems belonging to different classes
around stars with spectral types from M to A. To optimise the
scientific outcome of the mission, such stars need to be homogeneously
characterised beforehand. In this work, we focus on a methodology
based on spectral synthesis for the characterisation of FGK-type stars
from the Ariel Tier 1 Mission candidate sample (MCS) which exhibit
fast rotation. In addition, we analyse 108 slow-rotating FGK-type
stars, with either new observations or archival spectra available,
consistently as in our previous work using the equivalent width (EW)
analysis. Using our homogeneous set of stellar parameters, we studied
the correlations between stellar and planetary properties for the
Ariel MCS analysed so far. We confirmed a close relationship between
stellar mass (up to 1.8 Msun) and giant planet radius, with more
inflated planets at lower metallicity. We confirm that giant planets
are more frequent around more metal-rich stars that belong to the thin
disc, while lower-mass planets are also found in more metal-poor
environments, and are more frequent than giant planets in the thick
disc as also seen in other works in the literature.
Description:
Homogeneous determination of stellar and orbital parameters of FGK
stars from the Ariel mission candidate sample based on archival and
propertary data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 146 169 Stellar parameters
tableb1.dat 21 353 Projected rotational velocities
tablec1.dat 98 169 Orbital properties
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See also:
J/A+A/663/A161 : 187 FGK planet host stars parameters (Magrini+, 2022)
J/A+A/688/A193 : Ariel homogeneous stellar C, N, O abundances (da Silva+, 2024)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Identification of the star
14- 32 F19.15 deg RAdeg Right ascension (J2000)
34- 52 F19.15 deg DEdeg Declination (J2000)
54- 57 I4 K Teff Effective temperature
59- 61 I3 K e_Teff Error on the effective temperature
63- 66 F4.2 -- logg Surface gravity
68- 71 F4.2 -- e_logg Error on surface gravity
73- 77 F5.2 -- [Fe/H] Iron metallicity
79- 83 F5.3 -- e_[Fe/H] Error on iron metallicity
85- 88 F4.2 km/s xi Microturbulence velocity
90- 93 F4.2 km/s e_xi Error on microturbulence velocity
95- 98 F4.2 km/s vmac Macroturbulence velocity
100-103 F4.2 km/s e_vmac Error on macroturbulence velocity
105-108 F4.1 km/s vsini Projected rotational velocity
110-112 F3.1 km/s e_vsini Error on projected rotational velocity
114-117 F4.2 Msun Mass ? Stellar mass
119-122 F4.2 Msun e_Mass ? Stellar mass lower limit
124-127 F4.2 Msun E_Mass ? Stellar mass upper limit
129 I1 --- f_xi [0/1] Flag on the microturbulent velocity
(0 derived, 1 calculated)
131-146 A16 --- Spectra Spectra reference
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Identification of the star
14- 17 F4.1 km/s vsini Projected rotational velocity
19- 21 F3.1 km/s e_vsini Error on projected rotational velocity
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Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Identification of the star
14- 33 F20.15 km/s U ? U velocity component
35- 50 F16.12 km/s V ? V velocity component
52- 71 F20.16 km/s W ? W velocity component
73- 79 F7.2 kpc Rgc ? Galactocentric radius
81- 98 F18.16 --- e ? Orbit eccentricity
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Acknowledgements:
Maria Tsantaki, maria.tsantaki(at)inaf.it
References:
Tagrini et al., Paper I 2022A&A...663A.161M 2022A&A...663A.161M, Cat. J/A+A/663/A161
da Silva et al., Paper II 2024A&A...688A.193D 2024A&A...688A.193D, Cat. J/A+A/688/193
(End) Patricia Vannier [CDS] 08-Apr-2025