J/A+A/627/A161 CARMENES stars multi wavelength measurements (Passegger+, 2019)
The CARMENES search for exoplanets around M dwarfs. Photospheric parameters of
target stars from high-resolution spectroscopy.
II. Simultaneous multi wavelength range modeling of activity insensitive lines.
Passegger V.M., Schweitzer A., Shulyak D., Nagel E., Hauschildt P.H.,
Reiners A., Amado P.J., Caballero J.A., Cortes-Contreras M.,
Dominguez-Fernandez A.J., Quirrenbach A., Ribas I., Azarro M.,
Anglada-Escude G., Bauer F.F., Bejar V.J.S., Dreizler S., Guenther E.W.,
Henning T., Jeffers S.V., Kaminski A., Kuerster M., Lafarga M., Martin E.L.,
Montes D., Morales J.C., Schmidt J.H.M.M., Zechmeister M.
<Astron. Astrophys. 627, A161 (2019)>
=2019A&A...627A.161P 2019A&A...627A.161P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type ; Abundances, [Fe/H] ; Effective temperatures ;
Spectroscopy
Keywords: astronomical databases: miscellaneous - methods: data analysis -
techniques: spectroscopic - stars: late-type -
stars: fundamental parameters - stars: low-mass
Abstract:
We present precise photospheric parameters of 282 M dwarfs determined
from fitting the most recent version of PHOENIX models to
high-resolution CARMENES spectra in the visible (0.52-0.96um) and
near-infrared wavelength range (0.96-1.71um). With its aim to search
for habitable planets around M dwarfs, several planets of different
masses have been detected. The characterization of the target sample
is important for the ability to derive and constrain the physical
properties of any planetary systems that are detected. As a
continuation of previous work in this context, we derived the
fundamental stellar parameters effective temperature, surface gravity,
and metallicity of the CARMENES M-dwarf targets from PHOENIX model
fits using a χ2 method. We calculated updated PHOENIX stellar
atmosphere models that include a new equation of state to especially
account for spectral features of low-temperature stellar atmospheres
as well as new atomic and molecular line lists. We show the importance
of selecting magnetically insensitive lines for fitting to avoid
effects of stellar activity in the line profiles. For the first time,
we directly compare stellar parameters derived from multi wavelength
range spectra, simultaneously observed for the same star. In
comparison with literature values we show that fundamental parameters
derived from visible spectra and visible and near-infrared spectra
combined are in better agreement than those derived from the same
spectra in the near-infrared alone.
Description:
We present basic photospheric parameters of 282 M dwarfs within the
CARMENES survey in the visible and near-infrared wavelength ranges. In
table_b1 we provide Carmencita identifier (Karmn), Simbad name,
equatorial coordinates, spectral type, rotational velocity, assumed
age, and an activity flag for each star in our sample. In table_b2 we
give effective temperature, surface gravity and [Fe/H] for each star
in different wavelength ranges (VIS+NIR, NIR, and VIS), together with
their errors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 92 282 Basic information of investigated M dwarfs
tableb2.dat 133 282 Basic astrophysical parameters of investigated
M dwarfs in multiple wavelength ranges
(corrected version)
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See also:
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/A+A/623/A44 : CARMENES M-dwarfs activity indicators (Schoefer+, 2019)
J/A+A/615/A6 : Photospheric parameters of CARMENES stars (Passegger+, 2018)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn Carmencita identifier (JHHMMm+DDMMA)
14- 34 A21 --- Name Star name
36- 41 A6 --- GJ ?=0 GJ number
45- 46 I2 h RAh Right Ascension (ICRS, Ep=2016)
48- 49 I2 min RAm Right Ascension (ICRS, Ep=2016)
51- 55 F5.2 s RAs Right Ascension (ICRS, Ep=2016)
59 A1 --- DE- Declination sign (ICRS, Ep=2016)
60- 61 I2 deg DEd Declination (ICRS, Ep=2016)
63- 64 I2 arcmin DEm Declination (ICRS, Ep=2016)
66- 69 F4.1 arcsec DEs Declination (ICRS, Ep=2016)
73- 77 A5 --- SpType MK spectral type
80 A1 --- l_vsini Upper limit flag for rotational velocity
81- 84 F4.1 km/s vsini Rotational velocity
87- 90 F4.2 Gyr Age Assumed age
92 I1 --- factive [0/1] Flag for Activity; 1 if active
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn Carmencita identifier (JHHMMm+DDMMA)
14- 17 I4 K TeffVN ? Effective temperature in VIS+NIR
20- 22 I3 K e_TeffVN ? Error in effective temperature in VIS+NIR
26- 29 F4.2 [cm/s2] loggVN ? Surface gravity in VIS+NIR
33- 36 F4.2 [cm/s2] e_loggVN ? Error in surface gravity in VIS+NIR
40- 44 F5.2 [-] [Fe/H]VN ? Metallicity in VIS+NIR
48- 51 F4.2 [-] e_[Fe/H]VN ? Error in metallicity in VIS+NIR
55- 58 I4 K TeffN ? Effective temperature in NIR
61- 63 I3 K e_TeffN ? Error in effective temperature in NIR
67- 70 F4.2 [cm/s2] loggN ? Surface gravity in NIR
74- 77 F4.2 [cm/s2] e_loggN ? Error in surface gravity in NIR
81- 85 F5.2 [-] [Fe/H]N ? Metallicity in NIR
89- 92 F4.2 [-] e_[Fe/H]N ? Error in metallicity in NIR
96- 99 I4 K TeffV ? Effective temperature in VIS
102-104 I3 K e_TeffV ? Error in effective temperature in VIS
108-111 F4.2 [cm/s2] loggV ? Surface gravity in VIS
115-118 F4.2 [cm/s2] e_loggV ? Error in surface gravity in VIS
122-126 F5.2 [-] [Fe/H]V ? Metallicity in VIS
130-133 F4.2 [-] e_[Fe/H]V ? Error in metallicity in VIS
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Acknowledgements:
Vera Maria Passegger, vpassegger(at)hs.uni-hamburg.de
References:
Caballero et al., 2016csss.confE.148C
Reiners et al., 2018A&A...612A..49R 2018A&A...612A..49R, Cat. J/A+A/612/A49
Schoefer et al., 2019A&A...623A..44S 2019A&A...623A..44S, Cat. J/A+A/623/A44
Passegger et al., Paper I 2018A&A...615A...6P 2018A&A...615A...6P, Cat. J/A+A/615/A6
History:
17-Jul-2019: on-line version
10-Jan-2020: Corrections for source J23431+365 in tableb2.dat (from author)
(End) Vera Maria Passegger [HS, Germany]. Patricia Vannier [CDS] 18-Jun-2019