Submitting Campus
Daytona Beach
Department
Physical Sciences
Document Type
Article
Publication/Presentation Date
6-1-2006
Abstract/Description
We report the identification of LP 400-22 (WD 2234 + 222) as a very low mass and high-velocity white dwarf. The ultraviolet GALEX and optical photometric colors and a spectral line analysis of LP 400-22 show this star to have an effective temperature of 11,080 ± 140 K and a surface gravity of log g p 6.32 ± 0.08. Therefore, this is a helium-core white dwarf with a mass of 0.17 MꙨ. The tangential velocity of this white dwarf is 414 ± 43 km s-1, making it one of the fastest moving white dwarfs known. We discuss probable evolutionary scenarios for this remarkable object.
Publication Title
The Astrophysical Journal
DOI
https://doi.org/10.1086/505143
Publisher
IOP Publishing
Grant or Award Name
NSF AST 0206115, GSRP Training Grant NGT-51086
Scholarly Commons Citation
Kawka, A., Vennes, S., Oswalt, T. D., Smith, J., & Silvestri, N. M. (2006). LP 400-22, A Very Low Mass and High-Velocity White Dwarf. The Astrophysical Journal, 643(2). https://doi.org/10.1086/505143
Additional Information
Dr. Oswalt was not affiliated with Embry-Riddle Aeronautical University at the time this paper was published.