J/A+A/656/A162 CARMENES stellar atmospheric parameters (Marfil+, 2021)
The CARMENES search for exoplanets around M dwarfs.
Stellar atmospheric parameters of target stars with STEPARSYN.
Marfil E., Tabernero H. M., Montes D., Caballero J. A., Lazaro F. J.,
Gonzalez Hernandez, J. I., Nagel E., Passegger V. M., Schweitzer A.,
Ribas I., Reiners A., Quirrenbach A., Amado P. J., Cifuentes C.,
Cortes-Contreras M., Dreizler S., Duque-Arribas C., Galadi-Enriquez D.,
Henning T., Jeffers S. V., Kaminski A., Kurster M., Lafarga M.,
Lopez-Gallifa A., Morales J. C., Shan Y., Zechmeister M.
<Astron. Astrophys. 656, A162 (2021)>
=2021A&A...656A.162M 2021A&A...656A.162M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type ; Abundances, [Fe/H] ; Effective temperatures ;
Spectroscopy ; Optical
Keywords: techniques: spectroscopic - stars: fundamental parameters -
stars: late-type - stars: low-mass
Abstract:
We determine effective temperatures, surface gravities, and
metallicities for a sample of 343 M dwarfs observed with CARMENES, the
double-channel, high-resolution spectrograph installed at the 3.5m
telescope at Calar Alto Observatory. We employed SteParSyn, a Bayesian
spectral synthesis implementation, along with a grid of synthetic
spectra based on BT-Settl model atmospheres and the radiative transfer
code turbospectrum. The synthetic grid was computed around 75
magnetically insensitive TiI and FeI along with the TiO gamma- and
epsilon-bands. To avoid degeneracies in the parameter space, we
imposed Bayesian priors based on multi-band photometric data available
for the sample.
Description:
We present basic information of investigated M dwarfs, atomic data of
the selected TiI and FeI lines, wavelength ranges synthesised, and the
stellar atmospheric parameters (effective temperatures, surface
gravities, and metallicities) derived for the sample with SteParSyn.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 350 Basic information of investigated M dwarfs
table2.dat 80 75 Wavelength ranges, line masks and atomic parameters
for considered titanium and iron lines
table3.dat 105 350 Stellar atmospheric parameters of investigated
M dwarfs
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See also:
J/A+A/577/A128 : CARMENES input catalogue of M dwarfs (Alonso-Floriano+, 2015)
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/A+A/627/A161 : CARMENES stars multi wavelength measurements (Passegger+ 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn Carmencita identifier (JHHMMm+DDMMA)
13- 35 A23 --- Name Star name
37- 41 A5 --- SpType MK spectral type (1)
43- 49 F7.2 km/s RV Radial velocity (2)
51- 54 F4.2 km/s e_RV Error in radial velocity (2)
56- 64 A9 --- r_RV Reference for radial velocity (2)
66 A1 --- l_vsini Upper limit flag for rotational velocity (3)
67- 70 F4.1 km/s vsini Projected equatorial rotational velocity (3)
72- 75 F4.1 km/s e_vsini ? Error in rotational velocity (3)
77- 80 I4 --- SN Overall signal-to-noise ratio of
template spectrum
82 I1 --- Factive [0/1] Flag for activity (Halpha);
0 if active (4)
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Note (1): Spectral types from Carmencita (Alonso-Floriano et al.,
2015A&A...577A128A, Cat. J/A+A/577/A128).
Note (2): Radial velocities from Lafarga et al. (Laf20,
2020A&A...636A..36L 2020A&A...636A..36L, Cat. J/A+A/636/A36) if available, or computed using
SERVAL (Zechmeister et al. 2018A&A...609A..12Z 2018A&A...609A..12Z) otherwise.
Note (3): Projected equatorial rotational velocities adopted from Reiners et al.
(2018A&A...612A..49R 2018A&A...612A..49R, Cat. J/A+A/612/A49) or computed following the same
method otherwise.
Note (4): Halpha-active stars following Schofer et al. (2019A&A...623A..44S 2019A&A...623A..44S,
Cat. J/A+A/623/A44)
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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- 8 F8.2 0.1nm bRange ? Lower wavelength limit of the synthesised range
10- 17 F8.2 0.1nm BRange ? Upper wavelength limit of the synthesised range
19- 27 F9.3 0.1nm wline Central wavelength of the line (1)
29- 31 A3 --- El Element (TiI or FeI) (1)
33- 38 F6.4 [-] loggf Oscillator strength of the line (1)
40- 45 F6.3 eV EP Excitation potential of the line (1)
47- 51 F5.3 --- geff Effective Lande-factor of the line (1)
53- 55 A3 --- magnet Flag for lines particularly sensitive to the
stellar magnetic field (2)
57- 68 A12 --- Ref Reference for the lines used in other
spectroscopic studies (3)
70- 72 A3 --- GXAnd [yes no] Flag for visibility of the line in
early-type M dwarfs (e.g. GX And)
74- 76 A3 --- Luyten [yes no] Flag for visibility of the line in
mid-type M dwarfs (e.g. Luyten's star)
78- 80 A3 --- Teeg [yes no] Flag for visibility of the line in
late-type M dwarfs (e.g. Teegarden's star)
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Note (1): Atomic data from the VALD3 database (Ryabchikova et al.,
2015PhyS...90e4005R 2015PhyS...90e4005R and references therein).
Note (2): Lines particularly affected by the stellar magnetic field
(Lopez-Gallifa et al. in prep.)
Note (3): Lines employed in Tabernero et al. (Tab18, 2018MNRAS.476.3106T 2018MNRAS.476.3106T) and
Passegger et al. (Pas19, 2019A&A...627A.161P 2019A&A...627A.161P, Cat. J/A+A/627/A161)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn Carmencita identifier (JHHMMm+DDMMA)
13- 16 I4 K Tpr Central prior in effective temperature (1)
18- 20 I3 K s_Tpr Standard deviation of the prior in effective
temperature
22- 25 F4.2 --- gpr Central prior in surface gravity (1)
27- 30 F4.2 --- s_gpr Standard deviation of the prior in surface
gravity
32- 35 I4 K Teff1 ? Effective temperature obtained with
SteParSyn (free run)
37- 38 I2 K e_Teff1 ? Error in effective temperature
(free run)
40- 43 F4.2 [cm/s2] logg1 ? Surface gravity obtained with SteParSyn
(free run)
45- 48 F4.2 [cm/s2] e_logg1 ? Error in surface gravity (free run)
50- 54 F5.2 [-] [Fe/H]1 ? Metallicity obtained with SteParSyn
(free run)
56- 59 F4.2 [-] e_[Fe/H]1 ? Error in metallicity (free run)
61- 65 F5.2 [-] Corr1 ? Metallicity corrected for alpha enhancement
(free run)
67- 70 F4.2 [-] e_Corr1 ? Error in metallicity corrected for alpha
enhancement (free run)
72- 75 I4 K Teff2 ? Effective temperature obtained with
SteParSyn (fixed log g run)
77- 78 I2 K e_Teff2 ? Error in effective temperature
(fixed log g run)
80- 84 F5.2 [-] [Fe/H]2 ? Metallicity obtained with SteParSyn
(fixed log g run)
86- 89 F4.2 [-] e_[Fe/H]2 ? Error in metallicity
(fixed log g run)
91- 95 F5.2 [-] Corr2 ? Metallicity corrected for alpha enhancement
(fixed log g run)
97-100 F4.2 [-] e_Corr2 ? Error in metallicity corrected for alpha
enhancement (fixed log g run)
102-105 A4 --- Pop Kinematic membership in the Galactic
populations (2)
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Note (1): Prior probability distributions in effective temperature and
surface gravity according to the effective temperatures, stellar masses
and radii reported by Cifuentes et al. (2020A&A...642A.115C 2020A&A...642A.115C)
Note (2): Kinematic membership of the targets in the Galactic populations,
following Cortes-Contreras et al. (in prep.), as follows:
TD = thick disc
TD-D = thick disc-thin disc transition
D = thin disc
YD = young disc
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Acknowledgements:
Emilio Marfil, emigom01(at)ucm.es
(End) Emilio Marfil [UCM, Spain], Patricia Vannier [CDS] 15-Oct-2021