2021ApJS..253...45L

Query : 2021ApJS..253...45L

2021ApJS..253...45L - Astrophys. J., Suppl. Ser., 253, 45-45 (2021/April-0)

Stellar parameterization of LAMOST M dwarf stars.

LI J., LIU C., ZHANG B., TIAN H., QIU D. and TIAN H.

Abstract (from CDS):

The M dwarf stars are the most common stars in the Galaxy, dominating the population of the Galaxy at faint magnitudes. Precise and accurate stellar parameters for M dwarfs are of crucial importance for many studies. However, the atmospheric parameters of M dwarf stars are difficult to determine. In this paper, we present a catalog of the spectroscopic stellar parameters (Teff and [M/H]) of ∼300,000 M dwarf stars observed by both LAMOST and Gaia using the Stellar LAbel Machine (SLAM). We train a SLAM model using LAMOST spectra with APOGEE Data Release 16 labels with 2800 K < Teff < 4500K and -2 dex < [M/H] < 0.5 dex. The SLAM Teff is in agreement to within ∼50 K compared to the previous study determined by APOGEE observations, and the SLAM [M/H] agrees within 0.12 dex compared to the APOGEE observation. We also set up a SLAM model trained by the BT-Settl atmospheric model with random uncertainties (in cross validation) to 60 K and agreeing within ∼90 K compared to previous studies.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): M dwarf stars - Astronomy data analysis - Low mass stars - Catalogs

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR. // All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
2 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
5 Cl Berkeley 19 OpC 05 24 02.1 +29 34 35   12.33 11.4     ~ 65 0
6 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
7 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
8 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 65 0
9 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
10 [KGZ2008] 62 OpC 06 18 02.0 +24 42 38           ~ 9 0
11 Cl Berkeley 29 OpC 06 53 03.6 +16 55 24   14.3       ~ 187 0
12 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
13 Cl Chupina 1 OpC 08 50 07.0 +11 56 42           ~ 3 0
14 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
15 Cl Chupina 3 OpC 08 51 27.0 +11 23 42           ~ 3 0
16 Cl Chupina 5 OpC 08 53 01.0 +11 51 42           ~ 4 0

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