We report the discovery of cool DZ white dwarfs, which lie in the SDSS (u-g) vs. (g-r) two-color diagram across and below the main sequence. These stars represent the extension of the well-known DZ sequence towards cooler temperatures.
@article{arxiv.1010.4698,
title = {The cool end of the DZ sequence in the SDSS},
author = {Detlev Koester and Jonathan Girven and Boris Gaensicke and Patrick Dufour},
journal= {arXiv preprint arXiv:1010.4698},
year = {2015}
}
Comments
To appear in the proceedings of the "17th European Workshop on White Dwarfs", Tuebingen, Germany, August 16-20, 2010