2016A&A...586A.100L


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST05:31:36

2016A&A...586A.100L - Astronomy and Astrophysics, volume 586A, 100-100 (2016/2-1)

Metallicity determination of M dwarfs. High-resolution infrared spectroscopy.

LINDGREN S., HEITER U. and SEIFAHRT A.

Abstract (from CDS):

Several new techniques to determine the metallicity of M dwarfs with better precision have been developed over the last decades. However, most of these studies were based on empirical methods. In order to enable detailed abundance analysis, standard methods established for warmer solar-like stars, i.e. model-dependent methods using fitting of synthetic spectra, still need to be used. In this work we continue the reliability confirmation and development of metallicity determinations of M dwarfs using high-resolution infrared spectra. The reliability was confirmed through analysis of M dwarfs in four binary systems with FGK dwarf companions and by comparison with previous optical studies of the FGK dwarfs. The metallicity determination was based on spectra taken in the J band (1.1-1.4 µm) with the CRIRES spectrograph. In this part of the infrared, the density of stellar molecular lines is limited, reducing the amount of blends with atomic lines enabling an accurate continuum placement. Lines of several atomic species were used to determine the stellar metallicity. All binaries show excellent agreement between the derived metallicity of the M dwarf and its binary companion. Our results are also in good agreement with values found in the literature. Furthermore, we propose an alternative way to determine the effective temperature of M dwarfs of spectral types later than M2 through synthetic spectral fitting of the FeH lines in our observed spectra. We have confirmed that a reliable metallicity determination of M dwarfs can be achieved using high-resolution infrared spectroscopy. We also note that metallicites obtained with photometric metallicity calibrations available for M dwarfs only partly agree with the results we obtain from high-resolution spectroscopy.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: low-mass - techniques: spectroscopic

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * 79 Cet B * 02 35 19.8724274057 -03 33 44.338723664           F 4 0
2 * 79 Cet PM* 02 35 19.9292617962 -03 33 38.170691640   7.49 6.78     G2V 262 1
3 HD 16160B LM* 02 36 04.66 +06 53 14.8     16.77     M6V 27 1
4 HD 16160 PM* 02 36 04.9023844802 +06 53 12.431588708   6.81   5.2   K3V 485 1
5 V* BX Cet BY* 02 36 15.2666844128 +06 52 17.924295081   13.28   11.405   M3.5V 154 1
6 HD 285968 PM* 04 42 55.7753203198 +18 57 29.394344631 12.668 11.49 9.951 8.931 7.702 M2.5V 251 2
7 HD 50281B ** 06 52 18.0414038629 -05 11 24.039080436   11.47 10.05 9.870   M2.5V 104 0
8 HD 50281 PM* 06 52 18.0504546991 -05 10 25.366165190   7.64 6.57     K3.5V 175 0
9 L 675-81 PM* 08 40 59.2055621000 -23 27 22.598649814   13.2 11.975 11.637 9.37 M3.5V 106 1
10 HD 92727 ** 10 39 31.72928 -75 37 56.2785   9.9 9.2     F7/8(V) 21 0
11 Ross 905 PM* 11 42 11.0933874353 +26 42 23.658083337   12.06 10.613 10.272 8.24 M3V 498 1
12 HD 101930 PM* 11 43 30.1133689238 -58 00 24.776845450   9.12 8.21     K2V+ 83 1
13 TYC 8638-366-1 PM* 11 43 31.4391643615 -57 59 12.555518790   11.69 10.59 9.89 9.20 M0-M1 7 0
14 * tau Boo B * 13 47 15.3324773299 +17 27 26.432463096     11.1     M3V 32 0
15 * tau Boo Ro* 13 47 15.74340 +17 27 24.8552 5.02 4.98 4.49 4.09 3.85 F7IV-V 882 1
16 BD-07 4003 BY* 15 19 26.8271336166 -07 43 20.190958776 13.403 11.76 10.560 9.461 8.911 M3V 538 2
17 BD-12 4523 BY* 16 30 18.0582010683 -12 39 45.323235188 12.829 11.638 10.072 8.917 7.421 M3V 257 0
18 CD-46 11540 PM* 17 28 39.9455601300 -46 53 42.693246243 12.177 10.973 9.407 8.337 7.006 M3V 205 1
19 HD 173740 PM* 18 42 46.8942178098 +59 37 36.723092516   11.705   8.9   M3.5V 293 1
20 BD-05 5715 PM* 22 09 40.3443754647 -04 38 26.651267098 13.006 11.868 10.366 9.279 7.877 M3.5V 222 1
21 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 859 1

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2020.08.09-05:31:36

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