J/ApJS/265/61 Empirical stellar sp. library from LAMOST (ATLAS) (Ji+, 2023)
All Spectral Type LAMOST Spectra Library (ATLAS).
Ji W., Liu C., Deng L., Zhang Bo, Li J., Tian H., Li J.
<Astrophys. J. Suppl. Ser., 265, 61 (2023)>
=2023ApJS..265...61J 2023ApJS..265...61J
ADC_Keywords: Spectra, optical; Surveys; Abundances; Photometry
Keywords: Astronomy databases ; Catalogs ; Spectrophotometry
Abstract:
We present an empirical stellar spectra library, ATLAS, with
resolution R∼1800 and wavelength coverage from 3800-8700Å. These
spectra are homogeneously observed by the Large Sky Area Multi-Object
Fiber Spectroscopic Telescope and have been released in its DR5. ATLAS
is separated into two groups, ATLAS-A and -T. The former contains
5584 spectra covering spectral types from O- to M-type and some
special types such as A supergiant, blue horizontal-branch, and carbon
stars. All of the spectra have absolutely calibrated fluxes at certain
characteristic wavelengths corresponding to the optical passbands with
accuracy better than 2.9% by comparing with PanSTARRS1 g-, r-, and
i-band photometry. In addition, greater than 1% systematic uncertainty
from the fundamental calibration should be considered separately.
ATLAS-A contains 5342 spectra with spectral energy distribution
effective temperature, surface gravity, and metallicity and
242 spectra with only the effective temperature and surface gravity.
These parameters are consistent with the spectroscopic derived
parameters of the same stars. Compared to current empirical libraries,
ATLAS-A contains more cool giant stars, which may play a critical role
in understanding the evolution of galaxies. ATLAS-T, on the other
hand, contains 1118 spectral templates averaging over spectra with
similar stellar parameters from ATLAS-A. It smooths out some special
features in the individual spectra and can be used as a "standard"
atlas of stellar spectra. Containing stellar spectra with almost all
normal types, ATLAS may not only be a complete training data set for
stellar spectra parameter determination but also an ideal legacy for
stellar population synthesis.
Description:
LAMOST is a 4m reflective Schmidt telescope with 4000 fibers on a
20deg2 focal plane. By the end of 2017, LAMOST had released the DR5
catalog, which contains 9,026,365 low-resolution spectra, including
8,183,160 stellar spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
atlasa.dat 176 5584 ATLAS-A catalog
atlas-a/* . 5584 Individual spectra in FITS format for ATLAS-A
atlast.dat 60 1118 ATLAS-T catalog
atlas-t/* . 1118 Individual spectra in FITS format for ATLAS-T
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Description of file:
ATLAS-A_sp.fits and ATLAS-T_sp.fits are the original catalogs in FITS format;
from http://nadc.china-vo.org/res/r101205/
See also:
VI/39 : Model Atmospheres (Kurucz, 1979)
VII/102 : Spectrophotometric Atlas of Standard Stellar Spectra (Pickles 1985)
III/218 : ELODIE archive (Prugniel+, 2001)
III/232 : STELIB: A library of stellar spectra at R∼2000 (Le Borgne+, 2003)
VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)
V/164 : LAMOST DR5 catalogs (Luo+, 2019)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)
J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)
J/A+AS/130/65 : A standard stellar library. II. (Lejeune+ 1998)
J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000A (Pickles 1998)
J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)
J/A+A/404/661 : Fe5270, Fe5335, Mgb & Mg2 synthetic indices (Barbuy+, 2003)
J/ApJS/152/251 : Indo-US library of coude feed stellar sp. (Valdes+, 2004)
J/A+A/417/1055 : Extensive library of synthetic spectra (Zwitter+, 2004)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/ApJ/684/1143 : BHB candidates in the Milky Way (Xue+, 2008)
J/MNRAS/404/1639 : MILES base models & new line index system (Vazdekis+, 2010)
J/ApJ/738/79 : SDSS-DR8 BHB stars in the Milky Way's halo (Xue+, 2011)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/ApJ/765/12 : Carbon stars & DQ WDs from SDSS-DR7+DR8 (Green, 2013)
J/AJ/148/81 : APASS BVgri photometry of RAVE stars. I. (Munari+, 2014)
J/ApJS/226/1 : Carbon stars from LAMOST DR2 data (Ji+, 2016)
J/ApJS/230/16 : 05-L3 empirical stellar sp. from SDSS (Kesseli+, 2017)
J/ApJ/836/77 : A library of high-S/N opt. sp. of FGKM stars (Yee+, 2017)
J/ApJS/234/31 : Carbon stars from LAMOST using machine learning (Li+, 2018)
J/MNRAS/485/2167 : M-type stars in LAMOST DR5 unclassified spectra (Guo+, 2019)
J/ApJS/241/32 : OB stars from the LAMOST DR5 spectra (Liu+, 2019)
J/ApJ/883/175 : 1st release of MaNGA Stellar Library (MaStar) (Yan+, 2019)
J/ApJS/244/8 : M-type stars in LAMOST DR5 (Zhong+, 2019)
J/ApJS/246/9 : Stellar parameters of LAMOST stars using SLAM (Zhang+, 2020)
J/ApJS/257/54 : Early-type star param. from LAMOST LRS & MRS (Guo+, 2021)
Byte-by-byte Description of file: atlasa.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- SpID Name of the spectra in ATLAS-A (spectrum_name)
24- 31 F8.2 K Teff [3172.4/50000] Effective temperature derived
from SED fitting (Teff_sed)
33- 38 F6.4 [cm/s2] logg [0.4/6] Log of surface gravity derived from
SED fitting (logg_sed)
40- 45 F6.3 [-] [M/H] [-1.5/0.51]?=- Metallicity converted from
LAMOST [Fe/H] (M_H)
47- 56 E10.5 mag Av [1.6e-7/3.8] Extinction in the V band
derived from SED fitting (Av_sed)
58- 64 F7.4 mag DM [4.46/19.35] Distance modulus derived from
SED fitting (Dm_sed)
66- 72 F7.2 K TeffDR5 [3230/8500]?=- Effective temperature
obtained from LAMOST DR5 data (Teff_la)
74- 79 F6.4 [cm/s2] loggDR5 [0.43/4.9]?=- Surface gravity obtained from
LAMOST DR5 data (logg_la)
81- 99 I19 --- Gaia Gaia eDR3 identifier (sourceID)
101-115 F15.11 deg RAdeg Gaia eDR3 Right ascension (J2000) (ra)
117-131 F15.11 deg DEdeg [-9.2/61.6] Gaia eDR3 Declination (J2000) (dec)
133-139 F7.4 mas plx [0.006/13] Gaia eDR3 Parallax (parallax)
141-146 F6.4 mas e_plx [0.008/1] plx uncertainty (parallax_err)
148-156 F9.6 mag Gmag [7.9/19.5] Gaia eDR3 G-band magnitude (G_mag)
158-166 F9.6 mag BPmag [8.7/19] Gaia eDR3 BP-band magnitude (BP_mag)
168-176 F9.6 mag RPmag [7/16.2]?=- Gaia eDR3 RP-band magnitude (RP_mag)
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Byte-by-byte Description of file: atlast.dat
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Bytes Format Units Label Explanations
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1-22 A22 --- SpID Name of the spectra in ATLAS-T (spectrum_name)
24-31 F8.2 K Teff [3172.4/49928.1] Effective temperature
derived from SED fitting (Teff_sed)
33-38 F6.4 [cm/s2] logg [0.4/6] Log of surface gravity derived from
SED fitting (logg_sed)
40-45 F6.3 [-] [M/H] [-1.6/0.4]?=- Metallicity converted from
LAMOST [Fe/H] (M_H)
47-53 F7.2 K TeffDR5 [3230/9980]?=- Effective temperature
obtained from LAMOST DR5 data (Teff_la)
55-60 F6.4 [cm/s2] loggDR5 [0.4/5.1]?=- Surface gravity obtained from
LAMOST DR5 data (logg_la)
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History:
Downloaded from: http://nadc.china-vo.org/res/r101205/
(End) Emmanuelle Perret [CDS] 10-May-2023