Identification of White Dwarf from Gaia EDR3 via Spectra from LAMOST DR7

Xiao Kong; A-Li Luo

Identification of White Dwarf from Gaia EDR3 via Spectra from LAMOST DR7

Solar and Stellar Astrophysics 2021-10-04 v1

Authors: Xiao Kong , A-Li Luo

Abstract

We cross-matched 1.3 million white dwarf (WD) candidates from Gaia EDR3 with spectral data from LAMOST DR7 within 3 arcsec. Applying machine learning described in our previous work, we spectroscopically identified 6,190 WD objects after visual inspection, among which 1,496 targets were firstly confirmed. 32 detailed classes were adopted for them, including but not limited to DAB and DB+M. We estimated the atmospheric parameters for the DA and DB type WD using Levenberg-Marquardt least-squares algorithm (LM). Finally, a catalog of WD spectra from LAMOST was provided online.

Keywords

white dwarf gaia edr3 lamost dr7 machine learning spectral classification atmospheric parameters

Cite

@article{arxiv.2110.00002,
  title  = {Identification of White Dwarf from Gaia EDR3 via Spectra from LAMOST DR7},
  author = {Xiao Kong and A-Li Luo},
  journal= {arXiv preprint arXiv:2110.00002},
  year   = {2021}
}

Comments

3 pages, research note, submitted to RNAAS

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