New Oe Stars in LAMOST DR5

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

doi:10.3847/1538-4357/aad04f

Title: New Oe Stars in LAMOST DR5

Journal Article · 10 August 2018 · The Astrophysical Journal (Online)

DOI: https://doi.org/10.3847/1538-4357/aad04f · OSTI ID:1468404

^[1];

^[2]; Bai, Zhong -Rui ^[1]; Yu, Si -Cheng ^[1]; Dong, Yi-qiao ^[1]; Lei, Ya -Juan ^[1]; Yuan, Hai -Long ^[1]; Zhang, Wei ^[1]; Zhao, Yong -Heng ^[1]

Chinese Academy of Sciences (CAS), Beijing (China)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

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.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1468404

Report Number(s):: arXiv:1807.00574; FERMILAB-PUB--18-434-CD; 1691862

Journal Information:: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 1 Vol. 863; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Hot stars observed by XMM-Newton : II. A survey of Oe and Be stars*** Nazé, Yaël; Motch, Christian Astronomy & Astrophysics, Vol. 619 https://doi.org/10.1051/0004-6361/201833842	journal	November 2018
The single star path to Be stars Hastings, Ben; Wang, Chen; Langer, Norbert Astronomy & Astrophysics, Vol. 633 https://doi.org/10.1051/0004-6361/201937018	journal	January 2020
Classification for Unrecognized Spectra in LAMOST DR6 Using Generalization of Convolutional Neural Networks Zheng, Zi-Peng; Qiu, Bo; Luo, A-Li Publications of the Astronomical Society of the Pacific, Vol. 132, Issue 1008 https://doi.org/10.1088/1538-3873/ab5ed7	journal	January 2020

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stars: early-type
stars: emission-line
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Title: New Oe Stars in LAMOST DR5

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