J/A+A/689/A223 CARMENES Mg and Si abundances (Tabernero+, 2024)
The CARMENES search for exoplanets around M dwarfs.
Magnesium and silicon abundances of K7-M5.5 stars.
Tabernero H.M, Shan Y., Caballero J. A., Duque-Arribas C., Montes D.,
Gonzalez Hernandez J.I. , Zapatero Osorio M.R., Schweitzer A., Henning T.,
Cortes-Contreras M., Quirrenbach A., Amado P.J, Reiners A., Ribas I.,
Bergond G., Morales J. C.
<Astron. Astrophys. 689, A223 (2024)>
=2024A&A...689A.223T 2024A&A...689A.223T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type ; Effective temperatures ; Abundances ; Optical
Keywords: methods: data analysis - techniques: spectroscopic -
stars: abundances - stars: atmospheres -
stars: fundamental parameters - stars: late-type
Abstract:
We present the abundances of magnesium (Mg) and silicon (Si) for 314
dwarf stars with spectral types in the interval K7.0-M5.5 (Teff range
4200-3050K) observed with the CARMENES high-resolution spectrograph at
the 3.5m telescope at the Calar Alto Observatory. Our analysis
employs the BT-Settl model atmospheres, the radiative transfer code
Turbospectrum, and a state-of-the-art selection of atomic and
molecular data. These Mg and Si abundances are critical for
understanding both the chemical evolution and assembly of the Milky
Way and the formation and composition of rocky planets. Our chemical
abundances show a line-to-line scatter at the level of 0.1 dex for all
studied spectral types. The typical error bar of our chemical
abundance measurements is ±0.11dex (Mg) and ±0.16dex (Si) for all
spectral types based on the comparison of the results obtained for
stellar components of multiple systems. The derived abundances are
consistent with the galactic evolution trends and observed chemical
abundance distribution of earlier FGK-type stars in the solar
neighbourhood. Besides, our analysis provides compatible abundances
for stars in multiple systems. In addition, we studied the abundances
of different galactic stellar populations. In this paper, we also
explore the relation of the Mg and Si abundances of stars with and
without known planets
Description:
Magnesium and silicon abundances and main parameters of the
investigated CARMENES stars (sorted by SpT). Here we tabulate their
Karmn identifier, other name, spectral types (SpT), signal-to-noise
ratio (S/N), projected rotational velocities (vsini), effective
temperatures (Teff), surface gravities (logg), metallicity ([Fe/H]),
magnesium and silicon abundances ([Mg/H], [Si/H]), galactic population
kinematic membership, and planet occurrence (Npl) for the stars
analysed in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 143 314 Magnesium and silicon abundances and main
parameters of investigated stars (sorted by SpT)
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See also:
J/A+A/577/A128 : CARMENES input catalogue of M dwarfs. I
(Alonso-Floriano+, 2015)
J/A+A/656/A162 : CARMENES stellar atmospheric parameters (Marfil+, 2021)
J/A+A/670/A139 : CARMENES search for exoplanets around M dwarfs (Ribas+, 2023)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Karmn Karmn name
14- 36 A23 --- Name Other name
39- 43 A5 --- SpType Spectral type (1)
47- 50 I4 --- S/N Signal-to-noise ratio of the template spectrum
54- 57 F4.1 km/s vsini Projected rotational velocity (2)
61- 63 F3.1 km/s e_vsini Error on vsini (2)
67- 70 I4 K Teff Effective Temperature (3)
74- 75 I2 K e_Teff Error on effective temperature (3)
79- 82 F4.2 [cm/s2] logg Surface gravity (3)
86- 89 F4.2 [cm/s2] e_logg Error on surface gravity (3)
93- 97 F5.2 [-] [Fe/H] Metallicity ([Fe/H]) (3)
101-104 F4.2 [-] e_[Fe/H] Error on metallicity ([Fe/H]) (3)
108-112 F5.2 [-] [Mg/H] Mg abundance
116-119 F4.2 [-] e_[Mg/H] ? Line scatter for Mg
122-126 F5.2 [-] [Si/H] ? Si abundance
130-133 F4.2 [-] e_[Si/H] ? Line scatter for Si
136-139 A4 --- Pop Galactic population kinematic membership (4)
143 I1 --- Npl Number of known planets around the star (5)
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Note (1): Spectral types are from Alonso-Floriano et al.
(2015A&A...577A.128A 2015A&A...577A.128A, Cat. J/A+A/577/A128)
Note (2): Projected rotational velocities (vsini) are as given in Reiners et al.
(2018A&A...612A..49R 2018A&A...612A..49R, cat. J/A+A/612/A49) and
Marfil et al. (2021A&A...656A.162M 2021A&A...656A.162M, Cat. J/A+A/656/A162)
Note (3): Parameters taken from Marfil et al. (2021A&A...656A.162M 2021A&A...656A.162M,
Cat. J/A+A/656/A162)
Note (4): Kinematic disk membership assignments from Cortes-Contreras et al.
(submitted) as follows:
TD = thick disc
TD-D = thick disc-thin disc transition
D = thin disc
YD = young disc
Note (5): Number of known exoplanets around each star. Information taken from
Ribas et al. (2023A&A...670A.139R 2023A&A...670A.139R, cat. J/A+A/670/A139)
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Acknowledgements:
Hugo M. Tabernero, htabernero(at)ucm.es
(End) Patricia Vannier [CDS] 03-Sep-2024