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Title: New Oe Stars in LAMOST DR5

Abstract

Stars of spectral type Oe are very rare. To date, only 13 Oe stars have been identified within our Galaxy. In this paper, we present six new Oe stars and four new B0e stars found in LAMOST DR5. Repeated spectral observations of the same Oe stars show some emission line variability. The H$$\beta$$ emission of TYC 4801-17-1 shows rapid V/R variation. Phase lags in the V/R ratio of TYC 4801-17-1 spectra are also seen. We found the unusual O4.5 star RL 128 is an Oe star with variable H$$\alpha$$ intensity and its Ca II triplet emission appears when H$$\alpha$$ emission reaches maximum intensity. In conclusion, these newly identified early type Oe and B0e stars significantly increase the known sample.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1468404
Report Number(s):
[arXiv:1807.00574; FERMILAB-PUB-18-434-CD]
[Journal ID: ISSN 1538-4357; 1691862]
Grant/Contract Number:  
[AC02-07CH11359]
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
[Journal Name: The Astrophysical Journal (Online); Journal Volume: 863; Journal Issue: 1]; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; stars: early-type; stars: emission-line, Be; stars: massive

Citation Formats

Li, Guang -Wei, Shi, Jian -Rong, Yanny, Brian, Bai, Zhong -Rui, Yu, Si -Cheng, Dong, Yi-qiao, Lei, Ya -Juan, Yuan, Hai -Long, Zhang, Wei, and Zhao, Yong -Heng. New Oe Stars in LAMOST DR5. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aad04f.
Li, Guang -Wei, Shi, Jian -Rong, Yanny, Brian, Bai, Zhong -Rui, Yu, Si -Cheng, Dong, Yi-qiao, Lei, Ya -Juan, Yuan, Hai -Long, Zhang, Wei, & Zhao, Yong -Heng. New Oe Stars in LAMOST DR5. United States. doi:10.3847/1538-4357/aad04f.
Li, Guang -Wei, Shi, Jian -Rong, Yanny, Brian, Bai, Zhong -Rui, Yu, Si -Cheng, Dong, Yi-qiao, Lei, Ya -Juan, Yuan, Hai -Long, Zhang, Wei, and Zhao, Yong -Heng. Fri . "New Oe Stars in LAMOST DR5". United States. doi:10.3847/1538-4357/aad04f. https://www.osti.gov/servlets/purl/1468404.
@article{osti_1468404,
title = {New Oe Stars in LAMOST DR5},
author = {Li, Guang -Wei and Shi, Jian -Rong and Yanny, Brian and Bai, Zhong -Rui and Yu, Si -Cheng and Dong, Yi-qiao and Lei, Ya -Juan and Yuan, Hai -Long and Zhang, Wei and Zhao, Yong -Heng},
abstractNote = {Stars of spectral type Oe are very rare. To date, only 13 Oe stars have been identified within our Galaxy. In this paper, we present six new Oe stars and four new B0e stars found in LAMOST DR5. Repeated spectral observations of the same Oe stars show some emission line variability. The H$\beta$ emission of TYC 4801-17-1 shows rapid V/R variation. Phase lags in the V/R ratio of TYC 4801-17-1 spectra are also seen. We found the unusual O4.5 star RL 128 is an Oe star with variable H$\alpha$ intensity and its Ca II triplet emission appears when H$\alpha$ emission reaches maximum intensity. In conclusion, these newly identified early type Oe and B0e stars significantly increase the known sample.},
doi = {10.3847/1538-4357/aad04f},
journal = {The Astrophysical Journal (Online)},
number = [1],
volume = [863],
place = {United States},
year = {2018},
month = {8}
}

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    Works referencing / citing this record:

    Hot stars observed by XMM-Newton : II. A survey of Oe and Be stars***
    journal, November 2018