338 citations · 895 across the 15 of their papers we have counts for
3 papers · 1 filter
Towards a pure ZZ Ceti instability strip
B. G. Castanheira, S. O. Kepler, A. F. M. Costa +8
We have observed again two stars inside the ZZ Ceti instability strip that were previously classified as not-observed-to-vary (NOV) by Mukadam et al. (2004) and found them to be lo…
Gemini spectra of 12000K white dwarf stars
S. O. Kepler, B. G. Castanheira, A. F. M. Costa +1
We report signal-to-noise ratio SNR ~ 100 optical spectra for four DA white dwarf stars acquired with the GMOS spectrograph of the 8m Gemini north telescope. These stars have 18<g<…
Hot DB White Dwarfs from the Sloan Digital Sky Survey
Daniel J. Eisenstein, James Liebert, Detlev Koester +12
We present ugriz photometry and optical spectroscopy for 28 DB and DO white dwarfs with temperatures between 28,000K and 45,000K. About 10 of these are particularly well-observed;…