white dwarf stars
White dwarf stars
... White dwarf stars were first discovered only fifty years ago, when the science of astrophysics was in its ...faint stars were of spectral type M and then learnt that 40 Eri B was both ...
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Hot DAVs: a probable new class of pulsating white dwarf stars
... DA stars at the cool edge of the DB gap, pulsating in higher degree ( ) modes, but with some < 3 modes excited, so possibly ...pulsating white dwarfs, which we name the hot DAV stars, are ...DA ...
8
Mode identification from combination frequency amplitudes in pulsating white dwarf stars
... these stars in the separate instability strips are ...these stars range from 100 to 1500 s, with different periods favored depend- ing on ...(PNNV) stars, the first instability region, have spectra ...
139
Hot DAVs : a probable new class of pulsating white dwarf stars
... DA stars at the cool edge of the DB gap, pulsating in higher degree ( ) modes, but with some < 3 modes excited, so possibly ...pulsating white dwarfs, which we name the hot DAV stars, are ...DA ...
9
An overview of white dwarf stars
... of stars in general. In addition, white dwarf stars represent ideal testbeds for our understanding of matter under extreme conditions, and work on their constitutive physics (neutrino ...
10
Deposition of steeply infalling debris around white dwarf stars
... The primary goals of this paper are to: (i) elucidate the physics of steep infall of mall bodies toward WDs; and (ii) develop a useful algorithm for determining the outcomes. In the following two sections we discuss the ...
23
Dennihy_unc_0153D_17676.pdf
... at white dwarf cooling ages greater than 200 Myr, there is a dearth of high fractional infrared luminosity systems at white dwarf cooling ages below 200 Myr, indicating that the debris disks ...
146
Laser-plasma and self-absorption measurements with applications to analysis of atomic and molecular stellar astrophysics spectra
... astrophysical white dwarf stars has been content of research and documented communications for several decades or about 50 ...the white dwarf ratio of mass over ...from white ...
16
The formation of electrostatic shocks in quantum plasmas with relativistically degenerate electrons
... where Z i is the charge state of the nondegenerate ions. In the interior of the white dwarf stars, the ions are fully ionized due to pressure ionization, and hence Z i equals the number of protons in ...
6
The Fractional Hydrogen Atom: A Paradigm for Astrophysical Phenomena
... the white dwarf ...and white dwarf star got the maximum possible conductivity in ...these stars are examples of giant perfect conduc- tors at a relatively high temperature and magnetic ...
7
WHITE DWARF PERIOD TABLES
... published white dwarf data ...‘White Dwarf Period Tables’ instead of the ‘White Dwarf Data Tables’ used ...pulsating white dwarf stars starting from ...
31
A double white dwarf with a paradoxical origin?
... ble white dwarf, contrary to our assumption throughout the analysis presented ...massive white dwarf are stationary (Kulka- rni & van Kerkwijk 2010; Marsh et ...massive white ...
9
Constraining the angular momentum evolution of V455 Andromedae
... containing white dwarfs with hydrogen dominated atmospheres evolve to an orbital period minimum near 70 minutes ( ...component stars make them a prime laboratory to study the effects of angular momentum ...
11
PHL 5038: a spatially resolved white dwarf + brown dwarf binary
... the white dwarf PHL 5038 in UKIDSS photometry, consistent with the presence of a cool, substellar ...DA white dwarf, and a likely L8 brown dwarf companion, separated by ...
5
The binarity of the local white dwarf population
... single stars and binaries. We use SeBa to evolve stars from the zero-age main sequence (ZAMS) until and including the remnant ...of stars and ...
24
Status of the Calan-Hertfordshire Extrasolar Planet Search
... brown dwarf companions from the sample, and then complete a Bayesian study of the sample signal fractions, to further constrain the frequency of planet formation around metal-rich ...
8
The mass of the white dwarf in GW Libra
... The population of cataclysmic variables (CVs) provides an important sample of binary systems possessing homogeneous configurations of white dwarfs (WDs) accreting from near main-sequence donor stars. A CV ...
17
The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1
... For single white dwarfs, it is possible to use an initial- final mass relation for the white-dwarf to estimate the age of the system. However, this should be considered an up- per limit on the system ...
12
404056e0782355f3f01a65a76dd32a97a2f53fb4.pdf
... White dwarf rotation rates are important constraints for some models of SNe Ia ( ...accreting white dwarfs through the ignition of hydrogen shell fl ashes shows material mixing, and indicates the ...
10
White dwarf cooling sequences and cosmochronology
... faint white dwarfs, and may introduce systematic errors ...culls white dwarfs using their proper ...bright white dwarfs this luminosity function suffers from the same drawbacks as the HA-LF and the ...
11