Results 11 to 20 of about 112,298 (365)
White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 16 [PDF]
Monthly notices of the Royal Astronomical Society, 2019 White dwarfs are the end state of the evolution of more than 97 per cent of all stars, and therefore carry information on the structure and evolution of the Galaxy through their luminosity function and initial-to-final mass relation.
S. O. Kepler +8 more
semanticscholar +5 more sources
Stark Broadening and White Dwarfs [PDF]
Open Astronomy, 2011 White dwarf and pre-white dwarfs are the best types of stars for the application of Stark broadening research results in astrophysics, since in the atmospheres of these stars physical conditions are very favorable for this line broadening mechanism - in ...
Dimitrijević Milan S. +3 more
doaj +4 more sources
Detached white-dwarf close-binary stars – CV's extended family [PDF]
, 2000 I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems.
T. R. Marsh
openalex +5 more sources
Hot DAVs: a probable new class of pulsating white dwarf stars [PDF]
, 2013 We have discovered a pulsating DA white dwarf at the lower end of the temperature range 45 000–30 000 K where a few helium atmosphere white dwarfs are known. There are now three such pulsators known, suggesting that a new class of theoretically predicted
D. Kurtz +7 more
semanticscholar +4 more sources
On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model Atmosphere Analysis of Hot White Dwarfs from SDSS DR12 [PDF]
Astrophysical Journal, 2020 As they evolve, white dwarfs undergo major changes in surface composition, a phenomenon known as spectral evolution. In particular, some stars enter the cooling sequence with helium atmospheres (type DO) but eventually develop hydrogen atmospheres (type ...
A. Bédard +3 more
semanticscholar +1 more source
Constraints on light dark matter particles using white dwarf stars [PDF]
International Journal of Modern Physics D, 2020 We report constraints on the nucleon-dark matter particle cross-section using the internal luminosity of observed white dwarf stars in the globular cluster Messier 4.
G. Panotopoulos, I. Lopes
semanticscholar +1 more source
A Chondritic Solar Neighborhood
The Planetary Science Journal, 2023 A persistent question in exoplanet demographics is whether exoplanetary systems form from similar compositional building blocks to our own. Polluted white dwarf stars offer a unique way to address this question, as they provide measurements of the bulk ...
Isabella L. Trierweiler +2 more
doaj +1 more source
Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release [PDF]
, 2007 We present the culmination of our near-infrared survey of the optically spectroscopically identified white dwarf stars from the McCook and Sion catalog, conducted using photometric data from the Two Micron All Sky Survey final All Sky Data Release.
D. W. Hoard +7 more
openalex +5 more sources
White-Dwarf Asteroseismology With the Kepler Space Telescope
Frontiers in Astronomy and Space Sciences, 2020 In the course of their evolution, white-dwarf stars go through at least one phase of variability in which the global pulsations they undergo allow astronomers to peer into their interiors, making it possible to shed light on their deep inner structure ...
Alejandro H. Córsico +1 more
doaj +1 more source
X-Ray Signatures of Axion Conversion in Magnetic White Dwarf Stars. [PDF]
Physical Review Letters, 2019 White dwarf (WD) stars may radiate keV-energy axions produced in their stellar cores. This has been extensively studied as an extra channel by which WDs may cool, with some analyses even suggesting that axions can help explain the observed WD luminosity ...
Christopher Dessert +2 more
semanticscholar +1 more source