122 citations · 670 across the 14 of their papers we have counts for
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Whole Earth Telescope observations of the hot helium atmosphere pulsating white dwarf EC 20058-5234
WET Collaboration, D. J. Sullivan, T. S. Metcalfe +22
We present the analysis of a total of 177h of high-quality optical time-series photometry of the helium atmosphere pulsating white dwarf (DBV) EC 20058-5234. The bulk of the observ…
The pulsation modes of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler, D. E. Winget +74
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…
Whole Earth Telescope observations of the pulsating subdwarf B star PG 0014+067
M. Vuckovic, S. D. Kawaler
PG 0014+067 is one of the most promising pulsating subdwarf B stars for seismic analysis, as it has a rich pulsation spectrum. The richness of its pulsations, however, poses a fund…
Whole Earth Telescope observations of BPM 37093: a seismological test of crystallization theory in white dwarfs
A. Kanaan, A. Nitta, D. E. Winget +3
BPM 37093 is the only hydrogen-atmosphere white dwarf currently known which has sufficient mass (~ 1.1 M_sun) to theoretically crystallize while still inside the ZZ Ceti instabilit…
FIRST J102347.6+003841: The First Radio-Selected Cataclysmic Variable
Howard E. Bond, Richard L. White, Robert H. Becker +1
We have identified the 1.4 GHz radio source FIRST J102347.6+003841 (hereafter FIRST J1023+0038) with a previously unknown 17th-mag Galactic cataclysmic variable (CV). The optical s…
Hubble Space Telescope Spectroscopy of V471 Tauri: Oversized K Star, Paradoxical White Dwarf
M. Sean O'Brien, Howard E. Bond, Edward M. Sion
We have used the GHRS onboard the HST to obtain Lyman-alpha spectra of the hot white-dwarf (WD) component of the short-period eclipsing DA+dK2 pre-cataclysmic binary V471 Tauri, a…
Detection of Coronal Mass Ejections in V471 Tauri with the Hubble Space Telescope
Howard E. Bond, D. J. Mullan, M. Sean O'Brien +1
V471 Tauri, an eclipsing system consisting of a hot DA white dwarf (WD) and a dK2 companion in a 12.5-hour orbit, is the prototype of the pre-cataclysmic binaries. The late-type co…
PG 2131+066: A Test of Pre-White Dwarf Asteroseismology
M. Reed, Steven D. Kawaler, M. Sean O'Brien
PG 2131+066 is a composite-spectrum binary with a hot pulsating PG 1159-type pre-white dwarf and an early M-type main sequence star. Analysis of Whole Earth Telescope observations…
The Predicted Signature of Neutrino Emission in Observations of Pulsating Pre-White Dwarf Stars
M. Sean O'Brien, Steven D. Kawaler
Pre-white dwarf (PWD) star evolution can be driven by energy losses from neutrino interactions in the core. Unlike solar neutrinos, these are not the by-product of nuclear fusion,…
DQ Herculis in Profile: Whole Earth Telescope Observations and Smoothed Particle Hydrodynamics Simulations
M. A. Wood, the XCov 15 Team
DQ Herculis was the Summer 1997 WET northern-hemisphere primary target. The O-C phase diagram of the 71-s signal reveals out-of-eclipse phase variations resulting from the self ecl…
The Lower Main Sequence and the Orbital Period Distribution of Cataclysmic Variable Stars
J. Christopher Clemens, I. Neill Reid, John E. Gizis +1
The color-magnitude diagram of the lower main sequence, as measured from a volume-limited sample of nearby stars, shows an abrupt downward jump between Mv = 12 and 13. This jump in…
The Pulsating Pre-White Dwarf Star PG 0122+200
M. Sean O'Brien, J. Christopher Clemens, Steven D. Kawaler +1
We present an analysis of single-site time-series photometry of the pulsating pre-white dwarf PG 0122+200. We show the pulsations are consistent with a pattern of modes equally spa…