Carbon stars from LAMOST DR7

DOI

Carbon stars are excellent kinematic tracers of galaxies and play important roles in understanding the evolution of the Galaxy. Therefore, it is worthwhile to search for them in a large number of spectra. In this work, we build a new carbon star catalog based on the Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) DR7 spectra. The catalog contains 4542 spectra of 3546 carbon stars, identified through line index and near-infrared color-color diagrams. Through visual inspection of the spectra, we further subclassify them into 925 C-H, 384 C-R, 608 C-N, and 1292 Ba stars. However, 437 stars could not be subclassified due to their low signal-to-noise. Moreover, by comparing with the LAMOST DR7 pipeline we find 567 more carbon stars and visually subclassify them. We find that on the J-H versus H-Ks two-color diagram, C-N stars can be reliably distinguished from the other three subtypes. Additionally, by utilizing the Gaia distance, we study the distribution of carbon stars in the H-R diagram and identify 258 dwarf carbon stars by the criterion M_G_>5.0mag. Finally, we present the spatial distribution in Galactic coordinates of the 3546 carbon stars. The majority of C-N, C-R, and Ba stars are distributed at low Galactic latitudes, while most C-H and dwarf carbon stars are distributed at high Galactic latitudes.

Cone search capability for table J/ApJS/271/12/table3 (Carbon stars discovered in LAMOST DR7)

Cone search capability for table J/ApJS/271/12/table4 (Sub-type of carbon stars marked as "carbon" by LAMOST DR7 Pipeline)

Identifier
DOI http://doi.org/10.26093/cds/vizier.22710012
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/271/12
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/271/12
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/271/12
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/271/12
Provenance
Creator Li L.; Zhang K.; Cui W.; Shi J.; Ji W.; Huo Z.; Gao Y.; Zhang S.; Sun M.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy