2025ApJS..278...23C

Query : 2025ApJS..278...23C

2025ApJS..278...23C - Astrophys. J., Suppl. Ser., 278, 23 (2025/May-0)

Barium Abundances from the LAMOST Medium-Resolution Survey Stellar Spectra.

CHEN T.-Y., SHI J.-R., YAN H.-L., BEERS T.C., LI C.-Q., DING M.-Y., XIE X.-J., SHUAI L., ZHOU Z. and TANG Y.-J.

Abstract (from CDS):

Based on a template-matching method, we estimate the barium (Ba) abundances for stellar spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Medium-Resolution Spectroscopic Survey (MRS). The Ba abundances of 198,011 stars have been determined from MRS spectra with signal-to-noise ratios (S/N) > 40 combined with the stellar atmospheric parameters from the LAMOST Low-Resolution Spectroscopic Survey DR9 by the LAMOST Stellar Parameter Pipeline. The uncertainties in the Ba abundances from the LAMOST MRS spectra are less than 0.3 dex when S/N exceeds 40, which align closely with the results based on the high-resolution UVES spectra from the Gaia-ESO survey obtained by spectral synthesis. Further analysis of Ba abundances from repeated observations of the same stars reveals that random errors related to spectral quality remain below 0.3 dex at the same S/N, with a systematic overestimation for the low-S/N spectra. This extensive sample of stellar Ba abundances will enhance studies of the s-, i-, and r-processes, and deepen our understanding of the chemical-evolution history of the Milky Way.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar abundances - Sky surveys - Catalogs

Status at CDS : Large table(s) of objects being ingested in VizieR.

Simbad objects: 1

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Number of rows : 1
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 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0

Query : 2025ApJS..278...23C

Basic data :
NGC 2264 -- Open Cluster
Other object types: otypes_help 		OpC (2014A&A,OCISM,...), Cl* (2020A&A,C,...), As* (2019AJ,[KC2019]), HII (LBN,SH), ISM ([T70],[TP72]), Cl? (2013A&A), SB* (CCABS), * ([HMT98]), Rad (GRS)
ICRS coord. (ep=J2000) : 		06 40 53.7 +09 52 32 (Optical) [ ] E 2023A&A...674A..37G
FK4 coord. (ep=B1950 eq=1950) : 		06 38 08.5 +09 55 24 [ ]
Gal coord. (ep=J2000) : 		202.9450 +02.1712 [ ]
Proper motions mas/yr : 		-1.690 -3.727 [0.031 0.017 90] C 2020A&A...633A..99C
Radial velocity / Redshift / cz : 		V(km/s) 22.54 [0.26] / z(spectroscopic) 0.000075 [0.000001] / cz 22.54 [0.26]
   (Opt) A 2021A&A...647A..19T
Parallaxes (mas): 		1.354 [0.007] C 2020A&A...633A..99C
Angular size (arcmin): 		240.0 240.0 0 (~) C 2022A&A...664A..66M
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 3047 		Display criteria :

Identifiers (19) :
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NGC 2264 LBN 911 OCl 495 [KPR2004b] 107
CCABS 52 NAME XMAS TREE CL SH 2-273 [KPS2012] MWSC 0954
C 0638+099 NAME Christmas Tree Cluster Villafranca O-016 [T70] 22
GRS G203.20 +02.00 OCISM 108 [HMT98] AS 15-0 [TP72] 51
LBN 202.92+02.18 OCl 495.0 [KC2019] Theia 41

References (1876 between 1850 and 2026) (Total 1876)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 12    Distance : 11    Fe/H : 9    Plx : 13    PM : 14   

   

Observing logs
Herschel : 2    IUE : 8    XMM : 2   

   

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Data at NED - NASA/IPAC Extragalactic Database : NGC 2264

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NGC 2264

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