Thirty-Five New Pulsating Da White Dwarf Stars
Anjum S. Mukadam,Fergal Mullally,R. E. Nather,Don Winget,Ted von Hippel,S. J. Kleinman,Atsuko Nitta,Jurek Krzesinski,Jurek Krzesinski,Souza Oliveira Kepler,Antonio Kanaan,Detlev Koester,Denis J. Sullivan,D. Homeier,Susan E. Thompson,D. Reaves,C. Cotter,D. Slaughter,J. Brinkmann +18 more
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In this article, the authors presented 35 new pulsating DA (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS).Abstract:
We present 35 new pulsating DA (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS). We have acquired high-speed time series photometry of preselected DA white dwarfs with a prime focus CCD photometer on the 2.1 m telescope at McDonald Observatory over 15 months. We selected these stars on the basis of prior photometric and spectroscopic observations by the SDSS and HQS. For the homogeneous SDSS sample, we achieve a success rate of 80% for finding new variables at a detection threshold of 0.1%-0.3%. With 35 newly discovered DA variable white dwarfs, we almost double the current sample of 39.read more
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Journal ArticleDOI
A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
Daniel J. Eisenstein,Daniel J. Eisenstein,James Liebert,Hugh C. Harris,S. J. Kleinman,S. J. Kleinman,Atsuko Nitta,Atsuko Nitta,Nicole M. Silvestri,Scott A. Anderson,J. C. Barentine,Howard Brewington,J. Brinkmann,Michael Harvanek,Jurek Krzesinski,Eric H. Neilsen,Dan Long,Donald P. Schneider,Stephanie A. Snedden +18 more
TL;DR: A catalog of 9316 spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey Data Release 4 is presented in this paper, with a set of visual inspections and photometric cuts.
Journal ArticleDOI
Pulsating White Dwarf Stars and Precision Asteroseismology
TL;DR: In the 40 years since their discovery, pulsating white dwarf stars have moved from side-show curiosities to center stage as important tools for unraveling the deep mysteries of the Universe as discussed by the authors.
Journal ArticleDOI
Evolutionary and pulsational properties of white dwarf stars
Leandro Gabriel Althaus,Leandro Gabriel Althaus,Alejandro H. Córsico,Alejandro H. Córsico,Jordi Isern,Enrique García-Berro +5 more
TL;DR: A detailed review of the physics of white dwarfs can be found in this paper, with a focus on the physical processes that lead to the formation of the stars and the different energy sources responsible for chemical abundance changes that occur along their evolution.
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The Pulsating White Dwarf Stars
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TL;DR: In this paper, the authors present a summary of what is currently known about the three distinct families of isolated pulsating white dwarfs, including the GW Vir stars, V777 Her stars, and ZZ Ceti stars.
Journal ArticleDOI
A Catalog of Spectroscopically Identified White Dwarf Stars in the First Data Release of the Sloan Digital Sky Survey
Scot Kleinman,Hugh C. Harris,Daniel J. Eisenstein,James Liebert,Atsuko Nitta,Jurek Krzesinski,Jeffrey A. Munn,Conard C. Dahn,Suzanne L. Hawley,Jeffrey R. Pier,Gary D. Schmidt,Nicole M. Silvestri,J. Allyn Smith,J. Allyn Smith,Paula Szkody,Michael A. Strauss,Gillian R. Knapp,Matthew J. Collinge,Anjum S. Mukadam,Detlev Koester,Alan Uomoto,Alan Uomoto,David J. Schlegel,Scott F. Anderson,J. Brinkmann,Donald Q. Lamb,Donald P. Schneider,Donald G. York +27 more
TL;DR: In this article, the authors presented the full spectroscopic white dwarf and hot subdwarf sample from the Sloan Digital Sky Survey (SDSS) first data release, DR1.
References
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TL;DR: The Sloan Digital Sky Survey (SDSS) as mentioned in this paper provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of pi steradians above about Galactic latitude 30 degrees in five broad optical bands.
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TL;DR: The Sloan Digital Sky Survey (SDSS) as discussed by the authors provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the universe: a photometrically and astrometrically calibrated digital imaging survey of π sr above about Galactic latitude 30° in five broad optical bands to a depth of g' ~ 23 mag.
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Studies in astronomical time series analysis. II - Statistical aspects of spectral analysis of unevenly spaced data
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Masataka Fukugita,Takashi Ichikawa,James E. Gunn,Mamoru Doi,Kazuhiro Shimasaku,Donald P. Schneider +5 more
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TL;DR: The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈106 galaxies, 100,000 quasars, 30,000 stars, and 30, 000 serendipity targets as discussed by the authors.
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