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PreprintarXiv licencearXiv

OB stars identified in LAMOST Data Release 10

  • Guang Yang
  • Zhicun Liu
  • Xiao-Long Wang
  • Yanjun Guo
  • Wenyuan Cui
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Abstract

A large sample of OB stars plays an important role in studying the stellar parameters of massive stars, as well as the formation and evolution of the Milky Way. With the help of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 10 (DR10), we are able to construct a large sample of OB stars with spectroscopic data. In this study, we identify 48,463 spectra of 34,550 OB stars from LAMOST DR10, based on the Hertzsprung-Russell (H-R) diagram constructed with Gaia DR3 data and spectral line indices measured from LAMOST DR10 low-resolution spectra. Among these, 6907 OB stars are newly identified. We use the MKCLASS tool to derive the spectral subtypes of the OB sample. The spatial distribution of 25,287 OB stars and the Toomre diagram of 20,397 OB stars indicate that the majority of these stars are located in the Galactic disk. Based on their peculiar velocities, we identify 1960 runaway star candidates.

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Cite

BibTeXRIS
BibTeX
@misc{yang2026stars,
  title = {{OB stars identified in LAMOST Data Release 10}},
  author = {Guang Yang and Zhicun Liu and Xiao-Long Wang and Yanjun Guo and Wenyuan Cui},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.30200},
  eprint = {2608.30200},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.30200},
}
RIS
TY  - UNPB
TI  - OB stars identified in LAMOST Data Release 10
AU  - Guang Yang
AU  - Zhicun Liu
AU  - Xiao-Long Wang
AU  - Yanjun Guo
AU  - Wenyuan Cui
PY  - 2026
DA  - 2026/08/31
PB  - arXiv
DO  - 10.48550/arxiv.2608.30200
UR  - https://arxiv.org/abs/2608.30200
AB  - A large sample of OB stars plays an important role in studying the stellar parameters of massive stars, as well as the formation and evolution of the Milky Way. With the help of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 10 (DR10), we are able to construct a large sample of OB stars with spectroscopic data. In this study, we identify 48,463 spectra of 34,550 OB stars from LAMOST DR10, based on the Hertzsprung-Russell (H-R) diagram constructed with Gaia DR3 data and spectral line indices measured from LAMOST DR10 low-resolution spectra. Among these, 6907 OB stars are newly identified. We use the MKCLASS tool to derive the spectral subtypes of the OB sample. The spatial distribution of 25,287 OB stars and the Toomre diagram of 20,397 OB stars indicate that the majority of these stars are located in the Galactic disk. Based on their peculiar velocities, we identify 1960 runaway star candidates.
ER  -