378 citations · 5k across the 96 of their papers we have counts for
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Discovery of eleven new ZZ Ceti stars
B. G. Castanheira, S. O. Kepler, F. Mullally +8
We report the discovery of eleven new ZZ Cetis using telescopes at OPD (Observatório do Pico dos Dias/LNA) in Brazil, the 4.1 m SOAR (Southern Astrophysical Research) telescope at…
The Dust cloud around the White Dwarf G 29-38
William T. Reach, Marc J. Kuchner, Ted von Hippel +4
We present new observations of the white dwarf G 29-38 with the camera (4.5 and 8 microns), photometer (24 microns), and spectrograph (5.5-14 microns) of the Spitzer Space Telescop…
The White Dwarf Luminosity Function from SDSS Imaging Data
Hugh C. Harris, Jeffrey A. Munn, Mukremin Kilic +16
A sample of white dwarfs is selected from SDSS DR3 imaging data using their reduced proper motions, based on improved proper motions from SDSS plus USNO-B combined data. Numerous S…
Driving in ZZ Ceti stars - Problem solved?
A. Kim, D. E. Winget, M. H. Montgomery +1
There is a fairly tight correlation between the pulsation periods and effective temperatures of ZZ Ceti stars (cooler stars have longer periods). This seems to fit the theoretical…
Excess Infrared Radiation from a Massive DAZ White Dwarf: GD362 - a Debris Disk?
Mukremin Kilic, Ted von Hippel, S. K. Leggett +1
We report the discovery of excess K-band radiation from a massive DAZ white dwarf star, GD362. Combining infrared photometric and spectroscopic observations, we show that the exces…
Faint Blue Objects in the Hubble Deep Field South Revealed: White Dwarfs, Subdwarfs, and Quasars
Mukremin Kilic, R. A. Mendez, Ted von Hippel +1
We explore the nature of the faint blue objects in the Hubble Deep Field South. We have derived proper motions for the point sources in the Hubble Deep Field South using a 3 year b…
Measuring the evolution of the most stable optical clock G 117-B15A
S. O. Kepler, J. E. S. Costa, B. G. Castanheira +7
We report our measurement of the rate of change of period with time dP/dt for the 215 s periodicity in the pulsating white dwarf G 117-B15A, the most stable optical clock known. Af…
Ensemble Characteristics of the ZZ Ceti stars
Anjum S. Mukadam, M. H. Montgomery, D. E. Winget +2
We present the observed pulsation spectra of all known non-interacting ZZ Ceti stars (hydrogen atmosphere white dwarf variables; DAVs) and examine changes in their pulsation proper…
Cool White Dwarfs in the Sloan Digital Sky Survey
Mukremin Kilic, Jeffrey A. Munn, Hugh C. Harris +6
A reduced proper motion diagram utilizing Sloan Digital Sky Survey (SDSS) photometry and astrometry and USNO-B plate astrometry is used to separate cool white dwarf candidates from…
Eleven New DAVs from the Sloan Survey
F. Mullally, S. E. Thompson, B. G. Castanheira +5
We report the discovery of eleven new variable DA white dwarf (ZZ Ceti) stars. Candidates were selected by deriving temperatures from model fits to spectra obtained from the Sloan…