Asteroseismology and the Solar-Stellar Connection (2008)
In March 2009, NASA will launch the Kepler satellite -- a mission designed to discover habitable Earth-like planets around distant Sun-like stars. The method that Kepler will use to detect distant...
Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R., Bazot, Michael, Christensen-Dalsgaard, Joergen, Dall, Thomas H., ...
We have carried out a multi-site campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than three weeks with eleven telescopes, with...
The Production Rate and Employment of Ph.D. Astronomers (2007)
In an effort to encourage self-regulation of the astronomy job market, I examine the supply of, and demand for, astronomers over time. On the supply side, I document the production rate of Ph.D....
The Future of Computational Asteroseismology (2006)
The history of stellar seismology suggests that observation and theory often take turns advancing our understanding. The recent tripling of the sample of pulsating white dwarfs generated by the Sloan...
The Citation Impact of Digital Preprint Archives for Solar Physics Papers (2006)
Papers that are posted to a digital preprint archive are typically cited twice as often as papers that are not posted. This has been demonstrated for papers published in a wide variety of journals,...
THE CITATION IMPACT OF DIGITAL PREPRINT ARCHIVES FOR SOLAR PHYSICS PAPERS ∗ (2006)
Abstract. Papers that are posted to a digital preprint archive are typically cited twice as often as papers that are not posted. This has been demonstrated for papers published in a wide variety of...
An Asteroseismic Test of Diffusion Theory (2005)
The helium-atmosphere (DB) white dwarfs are commonly thought to be the descendants of the hotter PG 1159 stars, which initially have uniform He/C/O atmospheres. In this evolutionary scenario,...
A deeper understanding of white dwarf interiors (2005)
A detailed record of the physical processes that operate during post-main-sequence evolution is contained in the internal chemical structure of white dwarfs. Global pulsations allow us to probe the...
Cool White Dwarfs in the Sloan Digital Sky Survey (2005)
Kilic, Mukremin, Munn, Jeffrey A., Harris, Hugh C., Liebert, James, Von Hippel, Ted, Williams, Kurtis A., ...
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 metal-weak,...
The Rise and Citation Impact of astro-ph in Major Journals (2005)
The rise in the use of the arXiv preprint server (astro-ph) over the past decade has led to a major shift in the way astronomical research is disseminated. Schwarz & Kennicutt (2004) recently found...
Lessons for Asteroseismology from White Dwarf Stars (2005)
The interpretation of pulsation data for Sun-like stars is currently facing challenges quite similar to those faced by white dwarf modelers ten years ago. The observational requirements for...
White Dwarf Asteroseismology and the ^12C(alpha,gamma)^16O Rate (2003)
Due to a new global analysis method, it is now possible to measure the internal composition of pulsating white dwarf stars, even with relatively simple theoretical models. The precise internal...
Seismic Inference using Genetic Algorithms (2002)
A flood of reliable seismic data will soon arrive. The migration to larger telescopes on the ground may free up 4-m class instruments for multi-site campaigns, and several forthcoming satellite...
WhiteDwarf.org - Establishing a permanent endowment for the Whole Earth Telescope (2002)
White Dwarf Research Corporation is a 501(c)(3) non-profit organization dedicated to scientific research and public education on topics relevant to white dwarf stars. It was founded in 1999 in...
The Consequences of assuming m=0 for Global Model-fitting (2002)
A recent re-analysis of Whole Earth Telescope observations of GD 358 obtained in 1990 suggests that asteroseismology of additional DBV white dwarfs can lead to independent constraints on the...
White Dwarf Seismology and the ^{12}C(alpha,gamma)^{16}O Rate (2002)
Recent determinations of the internal composition and structure of two helium-atmosphere variable white dwarf stars, GD 358 and CBS 114, have led to conflicting implied rates for the...
Computational Asteroseismology (2001)
White dwarf asteroseismology offers the opportunity to probe the structure and composition of stellar objects governed by relatively simple physical principles. The observational requirements of...
Asteroseismology for the Masses (2000)
For many years, astronomers interested in white dwarf stars have promised that the study of these relatively simple compact objects would ultimately lead to useful information about the physics under...
I have developed a procedure utilizing a Genetic-Algorithm-based optimization scheme to fit the observed light curves of an eclipsing binary star with a model produced by the Wilson-Devinney code....