LTD064402+245919: A Subgiant with a 1–3 M ⊙ Undetected Companion Identified from LAMOST-TD Data

@article{Yang2021LTD064402245919AS,
  title={LTD064402+245919: A Subgiant with a 1–3 M ⊙ Undetected Companion Identified from LAMOST-TD Data},
  author={Fan Yang and Bo Zhang and Richard J. Long and Youjun Lu and Su-su Shan and Xing Wei and Jian-Ning Fu and Xian-Fei Zhang and Zhi-Chao Zhao and Yu Bai and Tuan Yi and Ling-Lin Zheng and Ze-Ming Zhou and Jifeng Liu},
  journal={The Astrophysical Journal},
  year={2021},
  volume={923}
}
  • Fan Yang, Bo Zhang, +11 authors Jifeng Liu
  • Published 15 October 2021
  • Physics
  • The Astrophysical Journal
Single-line spectroscopic binaries have recently contributed to stellar-mass black hole discovery, independently of the X-ray transient method. We report the identification of a single-line binary system, LTD064402+245919, with an orbital period of 14.50 days. The observed component is a subgiant with a mass of 2.77 ± 0.68 M ⊙, radius 15.5 ± 2.5 R ⊙, effective temperature T eff 4500 ± 200 K, and surface gravity log g 2.5 ± 0.25 dex. The discovery makes use of the Large Sky Area Multi-Object… 
The Spectroscopic Binaries from the LAMOST Medium-resolution Survey. I. Searching for Double-lined Spectroscopic Binaries with a Convolutional Neural Network
We developed a convolutional neural network model to distinguish the double-lined spectroscopic binaries (SB2s) from others based on single-exposure medium-resolution spectra (R ∼ 7500). The training

References

SHOWING 1-10 OF 59 REFERENCES
Mining for Candidates of Galactic Stellar-mass Black Hole Binaries with LAMOST
We study the prospects of searching for black hole (BH) binary systems with a stellar-mass BH and a non-compact visible companion, by utilizing the spectroscopic data of Large Sky Area Multi-Object
Eclipsing binaries in the All Sky Automated Survey catalogue
The All Sky Automated Survey (ASAS) is a long-term project to monitor bright variable stars over the whole sky. It has discovered 50 099 variables brighter than V < 14 mag south of declination +28 ◦
Discovery and characterization of 3000+ main-sequence binaries from APOGEE spectra
We develop a data-driven spectral model for identifying and characterizing spatially unresolved multiple-star systems and apply it to APOGEE DR13 spectra of main-sequence stars. Binaries and triples
A collection of model stellar spectra for spectral types B to early-M
Context. Models of stellar spectra are necessary for interpreting light from individual stars, planets, integrated stellar populations, nebulae, and the interstellar medium. Aims. We provide a
Searching for Black Hole Candidates by LAMOST and ASAS-SN
Most dynamically confirmed stellar-mass black holes and the candidates were originally selected from X-ray outbursts. In the present work, we search for black hole candidates in the LAMOST survey by
A Method to Search for Black Hole Candidates with Giant Companions by LAMOST
We propose a method to search for stellar-mass black hole (BH) candidates with giant companions from spectroscopic observations. Based on the stellar spectra of LAMOST Data Release 6, we obtain a
Zwicky Transient Facility and Globular Clusters: the Period–Luminosity and Period–Luminosity–Color Relations for Late-type Contact Binaries
In this work, we aimed to derive the gri-band period–luminosity (PL) and period–luminosity–color (PLC) relations for late-type contact binaries, for the first time, located in globular clusters,
Self-consistent Stellar Radial Velocities from LAMOST Medium-resolution Survey DR7
  • Bo Zhang, Jiao Li, +12 authors Yong-Hui Hou
  • Physics
    The Astrophysical Journal Supplement Series
  • 2021
Radial velocity (RV) is among the most fundamental physical quantities obtainable from stellar spectra and is rather important in the analysis of time-domain phenomena. LAMOST Medium-resolution
The ASAS-SN catalogue of variable stars I: The Serendipitous Survey
The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of $\sim2-3$ days down to V$\lesssim17$ mag. ASAS-SN has monitored
A package for the automated classification of periodic variable stars
We present a machine learning package for the classification of periodic variable stars. Our package is intended to be general: it can classify any single band optical light curve comprising at least
...
1
2
3
4
5
...