Searching for Black Hole Candidates by LAMOST and ASAS-SN
Creators
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1.
Xiamen University
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2.
National Astronomical Observatories
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3.
Infrared Processing and Analysis Center
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4.
University of California, Davis
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5.
University of Chinese Academy of Sciences
Abstract
Most dynamically confirmed stellar-mass black holes (BHs) and their candidates were originally selected from X-ray outbursts. In the present work, we search for BH candidates in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey using the spectra along with photometry from the All Sky Automated Survey for SuperNovae (ASAS-SN), where the orbital period of the binary may be revealed by the periodic light curve, such as the ellipsoidal modulation type. Our sample consists of nine binaries, where each source contains a giant star with large radial velocity variation (ΔV_R ≳ 70 km s^(-1)) and periods known from light curves. We focus on the nine sources with long periods (T_(ph) > 5 days) and evaluate the mass M_2 of the optically invisible companion. Since the observed ΔV_R from only a few repeating spectroscopic observations is a lower limit of the real amplitude, the real mass M_2 can be significantly higher than the current evaluation. It is likely an efficient method to place constraints on M 2 by combining ΔV_R from LAMOST and T_(ph) from ASAS-SN, particularly by the ongoing LAMOST Medium Resolution Survey.
Additional Information
© 2019 The American Astronomical Society. Received 2019 June 27; revised 2019 August 27; accepted 2019 September 12; published 2019 October 10. We thank Mou-Yuan Sun, Wei-Kai Zong, Xuefei Chen, Zhaoxiang Qi, and Kento Masuda for helpful discussions, and the referee for constructive suggestions that improved the paper. This work was supported by the National Natural Science Foundation of China (NSFC) under grants 11573023, 11603035, 11603038, U1831205, and 11425313, as well as was developed in part at the 2018 Gaia-LAMOST Sprint workshop, supported by the National Natural Science Foundation of China (NSFC) under grants 11333003 and 11390372, and the Fundamental Research Funds for the Central Universities under grants 20720190122, 20720190115, and 20720190051. This work has made use of data products from the Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) and the All-Sky Automated Survey for Supernovae (ASAS-SN). LAMOST is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences. ASAS-SN is hosted by Las Cumbres Observatory; we thank the Las Cumbres Observatory and its staff for its continuing support of the ASAS-SN project.Attached Files
Published - Zheng_2019_AJ_158_179.pdf
Accepted Version - 1909.06392.pdf
Files
1909.06392.pdf
Additional details
Identifiers
- Eprint ID
- 99241
- Resolver ID
- CaltechAUTHORS:20191011-115115754
Related works
- Describes
- https://arxiv.org/abs/1909.06392 (URL)
Funding
- National Natural Science Foundation of China
- 11573023
- National Natural Science Foundation of China
- 11603035
- National Natural Science Foundation of China
- 11603038
- National Natural Science Foundation of China
- U1831205
- National Natural Science Foundation of China
- 11425313
- National Natural Science Foundation of China
- 11333003
- National Natural Science Foundation of China
- 11390372
- Fundamental Research Funds for the Central Universities
- 20720190122
- Fundamental Research Funds for the Central Universities
- 20720190115
- Fundamental Research Funds for the Central Universities
- 20720190051
- National Development and Reform Commission
Dates
- Created
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2019-10-11Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)