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New way to weigh a white dwarf:Use the Hubble Space Telescope
white dwarf Hubble Space Telescope
2017/7/21
Astronomers have used, for the first time, a novel method to determine the mass of a nearby dead star. The star is a "white dwarf," the shrunken corpse of a star like our sun after it has burned up it...
U Sco 2010 outburst: observational evidence of an underlying ONeMg white dwarf
stars: individual: USco –novae, cataclysmic variables
2011/10/12
This paper presents U Sco nebular spectra collected in the period March-May 2010 after the binary outburst on Jan 28, 2010. The spectra display strong [Ne V] and [Ne III] lines that can be used to com...
Stark Broadening of Carbon and Oxygen Lines in Hot DQ White Dwarf Stars: Recent Results and Applications
stars: atmospheric parameters – broadening: Stark
2011/10/9
White dwarf stars are traditionally found to have surface compositions made primarily of hydrogen or helium. However, a new family has recently been uncovered, the so-called Hot DQ white dwarfs, which...
The white dwarf cooling sequence of NGC 6791: a unique tool for stellar evolution
stars: white dwarfs – stars: luminosity function, mass function – (Galaxy:) open clusters and associations: general –(Galaxy:) open clusters and associations: individual: NGC 6791
2011/10/9
NGC 6791 is a well-studied, metal-rich open cluster that is so close to us that can be imaged down to luminosities fainter than that of the termination of its white dwarf cooling sequence, thus allowi...
A 12 minute Orbital Period Detached White Dwarf Eclipsing Binary
Orbital Period Detached Dwarf Eclipsing Binary
2011/10/8
We have discovered a detached pair of white dwarfs (WDs) with a 12.75 min orbital period and a 1,315 km/s radial velocity amplitude. We measure the full orbital parameters of the system using its ligh...
An aluminum/calcium-rich, iron-poor, white dwarf star: evidence for an extrasolar planetary lithosphere?
calcium-rich iron-poor evidence extrasolar planetary lithosphere
2011/10/8
The presence of elements heavier than helium in white dwarf atmospheres is often a signpost for the existence of rocky objects that currently or previously orbited these stars. We have measured the ab...
A white dwarf companion to the relativistic pulsar PSR J1141-6545
methods photometry – binaries close – pulsars general – stars neutron white dwarfs – individual PSRJ1141− 6545
2010/11/10
Pulsars with compact companions in close eccentric orbits are unique laboratories for testing general relativity and alternative theories of gravity. Moreover, they are excellent targets for future gr...
Does an Average White Dwarf Have Enough Mass to Prevent an Accretion Disk Tilt?
astrophysics accretion white dwarfs cataclysmic variables
2010/11/16
In a recent publication, we introduce the lift force as a common source to accretion disk
tilt that is likely relevant to accretion disk systems. Lift is generated by slightly different supersonic ga...
Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations
magnetic white dwarf non-radial pulsations magneto-dipole emission
2010/11/11
We study radiative activity of magnetic white dwarf undergoing torsional vibrations about axis of its own dipole magnetic moment under the action of Lorentz restoring force. It is shown that pulsating...
Old White Dwarf Stars with Some Hydrogen -- Cooling Curves
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
We present theoretical analysis on old white dwarf stars with \emph{some} hydrogen, that possess a mass of surface hydrogen from $1\times10^{-11}M_{\sun}$ to $1\times10^{-7}M_{\sun}$. The evolution of...
Ab initio Stellar Astrophysics: Reliable Modeling of Cool White Dwarf Atmospheres
Solar and Stellar Astrophysics (astro-ph.SR) Materials Science (cond-mat.mtrl-sc)
2010/12/27
Over the last decade {\it ab initio} modeling of material properties has become widespread in diverse fields of research. It has proved to be a powerful tool for predicting various properties of matte...
Possibility of a white dwarf as the accreting compact Star in ci cam (xte j0421+560)
white dwarf compact Star ci cam
2009/6/17
Possibility of a white dwarf as the accreting compact Star in ci cam (xte j0421+560)。
Population synthesis studies of white dwarf binaries
white dwarf binaries Population synthesis
2009/6/17
Population synthesis studies of white dwarf binaries。
Testing common envelope theories with white dwarf Binaries
white dwarf Binaries common envelope
2009/6/17
Testing common envelope theories with white dwarf Binaries。
Convective overshooting in White Dwarf and ZZ Ceti stars
Convective overshooting White Dwarf ZZ Ceti stars
2009/6/10
Convective overshooting in White Dwarf and ZZ Ceti stars。