Results 41 to 50 of about 154,154 (200)
The Mass of the White Dwarf Companion in the Self-Lensing Binary KOI-3278: Einstein vs. Newton [PDF]
, 2019 KOI-3278 is a self-lensing stellar binary consisting of a white-dwarf secondary orbiting a Sun-like primary star. Kruse and Agol (2014) noticed small periodic brightenings every 88.18 days in the Kepler photometry and interpreted these as the result of ...
Agol, Eric +12 more
core +2 more sources
Cubic crystal elastic constants of a white dwarf stellar core determined via modal analysis
AIP Advances, 2021 In this work, we present the cubic crystal elastic constants of a fully crystallized white dwarf stellar core. Elastic constants were calculated utilizing modal analysis of three-dimensional single-layer and stratified multi-layer crystalline core models.
K. A. Pestka II +3 more
doaj +1 more source
A consistency test of white dwarf and main sequence ages: NGC 6791
EPJ Web of Conferences, 2013 NGC 6791 is an open cluster that it is so close to us that can be imaged down to very faint luminosities. The main sequence turn-off age (∼8 Gyr) and the age derived from the cut-off of the white dwarf luminosity function (∼6 Gyr) were found to be ...
Córsico A.H. +5 more
doaj +1 more source
Electromagnetic Characterization of the LISA Verification Binary ZTF J0526+5934
The Astrophysical Journal, 2023 We present an analysis of new and archival data to the 20.506 minute LISA verification binary J052610.42+593445.32 (J0526+5934). Our joint spectroscopic and photometric analysis finds that the binary contains an unseen M _1 = 0.89 ± 0.11 M _⊙ CO-core ...
Alekzander Kosakowski +3 more
doaj +1 more source
, 2012 There is a striking and unexplained dearth of brown dwarf companions in close orbits (< 3AU) around stars more massive than the Sun, in stark contrast to the frequency of stellar and planetary companions.
Alexander, R. D. +8 more
core +1 more source
Full evolution of low-mass white dwarfs with helium and oxygen cores [PDF]
, 2007 We study the full evolution of low-mass white dwarfs with helium and oxygen cores. We revisit the age dichotomy observed in many white dwarf companions to millisecond pulsar on the basis of white dwarf configurations derived from binary evolution ...
Althaus, Leandro Gabriel +3 more
core +3 more sources
Magnetism in white Dwarfs [PDF]
Symposium - International Astronomical Union, 1971 Searches have been made for the normal and quadratic Zeeman effect and broad-band circular polarization in white dwarf stars. A positive effect has been found in Grw + 70°8247 whose continuum shows both linear and circular polarization.
J. D. Landstreet, J. R. P. Angel
openaire +1 more source
Studying the Radiation of a White Dwarf Star Falling onto a Black Hole
The Astrophysical JournalWe investigate electromagnetic and gravitational radiation generated during the process of the tidal stripping of a white dwarf star circulating a black hole.
Marek Nikołajuk +3 more
doaj +1 more source
Astronomy & AstrophysicsMany white dwarfs are observed in compact double white dwarf binaries, and through the emission of gravitational waves, a large fraction are destined to merge.
Cristea Andrei A. +33 more
doaj +1 more source
Explosion of White Dwarfs [PDF]
International Astronomical Union Colloquium, 1987 AbstractWe present models for Type I supernova light curves based on the explosion of partially solid white dwarfs in close binary systems. Studies of such explosions show that they leave bound remnants of different size. Our results reproduce quite well the maximun luminosities, the expansion velocities and the shape of the light curve.
R. Lopez, J. Isern, J. Labay, R. Canal
openaire +1 more source