Submitting Campus
Daytona Beach
Department
Physical Sciences
Document Type
Article
Publication/Presentation Date
6-2013
Abstract/Description
We present a spectroscopically identified catalog of 70 DA white dwarfs (WDs) from the LAMOST pilot survey. Thirty-five are found to be new identifications after cross-correlation with the Eisenstein et al. and Villanova catalogs. The effective temperature and gravity of these WDs are estimated by Balmer lines fitting. Most of them are hot WDs. The cooling times and masses of these WDs are estimated by interpolation in theoretical evolution tracks. The peak of the mass distribution is found to be ∼0.6M, which is consistent with prior work in the literature. The distances of these WDs are estimated using the method of synthetic spectral distances. All of these WDs are found to be in the Galactic disk from our analysis of space motions. Our sample supports the expectation that WDs with high mass are concentrated near the plane of the Galactic disk.
Publication Title
The Astronomical Journal
DOI
https://doi.org/10.1088/0004-6256/145/6/169
Publisher
IOP Publishing
Scholarly Commons Citation
Zhao, J., Luo, A., Oswalt, T. D., & Zhao, G. (2013). 70 DA White Dwarfs Identified in Lamost Pilot Survey. The Astronomical Journal, 145(6). https://doi.org/10.1088/0004-6256/145/6/169
Additional Information
Dr. Oswalt was not affiliated with Embry-Riddle Aeronautical University at the time this paper was published.