J/ApJS/244/8 M-type stars in LAMOST DR5 (Zhong+, 2019)
Value-added catalogs of M-type stars in LAMOST DR5.
Zhong J., Li J., Carlin J.L., Chen L., Mendez R.A., Hou J.
<Astrophys. J. Suppl. Ser., 244, 8-8 (2019)>
=2019ApJS..244....8Z 2019ApJS..244....8Z (SIMBAD/NED BibCode)
ADC_Keywords: Stars, M-type; Spectra, optical; Photometry, infrared;
Stars, giant; Stars, dwarfs
Keywords: catalogs; stars: carbon; stars: late-type; surveys
Abstract:
We present new catalogs of M giant and M dwarf stars from the Large
Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) data
release 5 (DR5). In total, 39796 M giants and 501152 M dwarfs are
identified from the classification pipeline. The template-fitting
results contain M giants with 7 temperature subtypes from M0 to M6,
M dwarfs with 18 temperature subtypes from K7.0 to M8.5, and 12
metallicity subclasses from dMr to usdMp. We cross-matched our M-type
catalog with the Two Micron All-Sky Survey (2MASS) and Wide-field
Infrared Survey Explorer (WISE) catalog to obtain infrared magnitude
and colors. Adopting the distances derived from the parallaxes in Gaia
DR2, the MG versus (Gbp-Grp)0 diagram shows that there are
also early-type stars and white dwarf-M dwarf binaries included in our
M-type stars sample, with a contamination rate of about 4.6% for
M giants and 0.48% for M dwarfs. We found that CaH spectral indices
are an efficient selection criteria for carbon stars. A total of 289
carbon stars were identified from the M giants sample, and further
confirmed by LAMOST spectra.
Description:
As the most efficient spectroscopic survey telescope, the LAMOST, also
known as the Guo Shou Jing Telescope, has finished the first stage of
its regular survey (LAMOST-I; 2011-2017; including the pilot survey),
and provided 9,017,844 low-resolution (R∼1800) optical spectra in its
fifth data release, of which 8,171,443 are stellar spectra.
In this work we have adopted the template-fitting pipeline of
Li+ 2016, J/ApJ/823/59 combined with a classification algorithm
(Zhong+ 2015, J/AJ/150/42) and revised M-type spectral templates
(Zhong+ 2015, J/other/RAA/15.1154) to identify and classify M-type
stars from LAMOST DR5.
After excluding outlier spectra and combining duplicated spectra, a
total of 540,948 spectra were identified as M-type stars, including
39,796 M giant spectra and 501,152 M dwarf spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 197 540948 The M giant and M dwarf catalog
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See also:
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+, 2003)
II/328 : AllWISE Data Release (Cutri+, 2013)
I/345 : Gaia DR2 (Gaia, 2018)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
V/153 : LAMOST DR4 catalogs (Luo+, 2018)
V/164 : LAMOST DR5 catalogs (Luo+, 2019)
J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)
J/ApJ/670/346 : M giant stars in the Sagittarius dwarf galaxy. V. (Chou+, 2007)
J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)
J/AJ/147/76 : Photometry of M giant cand. in the Milky Way (Bochanski+, 2014)
J/AJ/150/42 : Catalog of 2612 M dwarfs from LAMOST (Zhong+, 2015)
J/other/RAA/15.1154 : M-giant star candidates in LAMOST DR 1 (Zhong+, 2015)
J/other/RAA/15.1182 : M Dwarf catalog of LAMOST DR1 (Guo+, 2015)
J/other/RAA/15.1671 : New carbon stars from LAMOST survey (Si+, 2015)
J/ApJ/823/59 : WISE and 2MASS photometry of M giant stars (Li+, 2016)
J/ApJS/226/1 : Carbon stars from LAMOST DR2 data (Ji+, 2016)
J/ApJS/234/31 : Carbon stars from LAMOST using machine learning (Li+, 2018)
J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diagrams (Gaia Collaboration, 2018)
J/ApJS/240/31 : M-subdwarf research. I. LAMOST DR4 spectra obs. (Zhang+, 2019)
J/ApJS/243/28 : M-type star magnetic activities from LAMOST+Kepler (Lu+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- OT M type: G=Giant (39796 stars) or
D=Dwarf (501152 stars)
3- 21 A19 --- Name LAMOST DR5 identifier (JHHMMSS.ss+DDMMSS.s)
23- 32 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
34- 42 F9.6 deg DEdeg Declination in decimal degrees (J2000)
44- 48 F5.3 --- CaH2 [0.02/1.6] LAMOST CaH2 spectral index
50- 54 F5.3 --- CaH3 [0.3/1.754] LAMOST CaH3 spectral index
56- 60 F5.3 --- TiO5 [0.002/1.2] LAMOST TiO5 spectral index
62- 66 F5.1 --- SNR [0/999] SNR of i filter in LAMOST spectrum
68- 75 A8 --- SpT Spectral subtype classified
by the template-fitting algorithm
77- 82 F6.3 mag Gmag [5/21.3]? Gaia DR2 dereddened G band magnitude
84- 89 F6.3 mag GBPmag [5/21]? Gaia DR2 dereddened Blue Passband
magnitude
91- 96 F6.3 mag GRPmag [3.9/20]? Gaia DR2 dereddened Red Passband
magnitude
98-103 F6.3 mag Jmag [1.6/17.4]? 2MASS dereddened J band magnitude
105-110 F6.3 mag Hmag [0.7/17]? 2MASS dereddened H band magnitude
112-117 F6.3 mag Ksmag [0.4/17.4]? 2MASS dereddened Ks band magnitude
119-124 F6.3 mag W1mag [-2.1/17.5]? WISE dereddened 3.4um band
magnitude
126-131 F6.3 mag W2mag [-1.1/17.5]? WISE dereddened 4.6um band
magnitude
133-136 F4.2 mag E(B-V) [0/3.1]? 3D dust mapped reddening
138-142 I5 pc Dist [10/18024]? Gaia DR2 parallax distance
144-149 I6 km/s RVel [-30417/30537]? LAMOST radial velocity
151-156 F6.1 [Sun] [M/H] [-590/0.2]? M giant estimated photometric
metallicity
158-162 I5 pc X [-1950/441]? Galactocentric X coordinate (to
the direction opposite to that of the Sun)
164-168 I5 pc Y [-7150/17205]? Galactocentric Y coordinate (to
the direction of Galactic rotation)
170-174 I5 pc Z [-6521/12835]? Galactocentric Z coordinate
(toward the North Galactic Pole)
176-181 I6 km/s U [-27840/29401]? Galactic space velocity along X
183-188 I6 km/s V [-32272/30745]? Galactic space velocity along V
190-195 I6 km/s W [-30652/31108]? Galactic space velocity along W
197 A1 --- Cl Subsample label (1)
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Note (1): Subsample label as follows:
m = confirmed M type star (505519 occurrences);
n = non-M type star (3921 occurrences);
c = carbon star (289 occurrences);
w = white dwarf binary (72 occurrences);
u = unconfirmed M type star due to lack of Gaia data (31147 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Feb-2020