Results 81 to 90 of about 154,154 (200)

Collisions in a gas-rich white dwarf planetary debris disc. [PDF]

Mon Not R Astron Soc, 2021
Swan A, Kenyon SJ, Farihi J, Dennihy E, Gänsicke BT, Hermes JJ, Melis C, von Hippel T.   +7 more
europepmc   +1 more source

Formation of undermassive single white dwarfs and the influence of planets on late stellar evolution [PDF]

, 1998
We propose a scenario to form low-mass, single, slow rotating white dwarfs from a solar-like star accompanied by a massive planet, or a brown dwarf, in a relatively close orbit (e.g. HD 89707).
Nelemans, G., Tauris, T. M.
core   +2 more sources

White dwarf variability

There are a few different mechanisms that can cause white dwarf stars to vary in brightness, providing opportunities to probe the physics, structures, and formation of these compact stellar remnants. The observational characteristics of the three most common types of white dwarf variability are summarized: stellar pulsations, rotation, and ellipsoidal ...
openaire   +2 more sources

Cool versus Ultracool White Dwarfs [PDF]

The Astronomical Journal, 2005
9 pages, 4 figures, 1 table, accepted to ...
openaire   +3 more sources

Photometric White Dwarf Rotation

The Astrophysical Journal
We present a census of photometrically detected rotation periods for white dwarf (WD) stars. We analyzed the light curves of 9285 WD stars observed by the Transiting Exoplanet Survey Satellite up to Sector 69.
Gabriela Oliveira da Rosa, S. O. Kepler, L. T. T. Soethe, Alejandra D. Romero, Keaton J. Bell   +4 more
doaj   +1 more source

How Sublimation Delays the Onset of Dusty Debris Disk Formation Around White Dwarf Stars. [PDF]

Astrophys J Lett, 2021
Steckloff JK, Debes J, Steele A, Johnson B, Adams ER, Jacobson SA, Springmann A.   +6 more
europepmc   +1 more source

Detection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr

The Astrophysical Journal
We report on the discovery of circular polarization modulated with a period of 1.943 ± 0.002 hr in the cataclysmic variable V1082 Sgr. These findings unambiguously reveal the rotation of a magnetic white dwarf and establish its intermediate polar nature.
I. J. Lima, G. Tovmassian, C. V. Rodrigues, A. S. Oliveira, G. J. M. Luna, D. A. H. Buckley, K. M. G. Silva, A. C. Mattiuci, D. C. Souza, W. Schlindwein, F. Falkenberg, M. S. Palhares   +11 more
doaj   +1 more source

Optical identification of the companion to PSR J1911-5958A, the pulsar binary in the outskirts of NGC 6752

, 2003
We report on the identification of the optical counterpart of the binary millisecond pulsar PSR J1911-5958A, located in the outskirts of the globular cluster NGC 6752. At the position of the pulsar we find an object with V=22.08, B-V=0.38, U-B=-0.49. The
Althaus, Anderson, Assafin, C. G. Bassa, Callanan, Colpi, D'Amico, Dolphin, Dolphin, Driebe, Edmonds, F. Verbunt, Gratton, Holtzman, Holtzman, L. Homer, Lugger, M. H. van Kerkwijk, Phinney, Schlegel, Serenelli, Thorsett, Van Kerkwijk, Zacharias   +23 more
core   +1 more source

White Dwarf Cooling Curves and Searches For White Dwarfs [PDF]

Highlights of Astronomy, 1998
White dwarf (WD) evolution is essentially a cooling problem in two parts. Degenerate electrons in the core provide the support while non-degenerate C and O ions provide the thermal reservoir (Koester & Chanmugam 1990, Kawaler 1996). The rate of energy loss through the non-degenerate envelope of H and He—segregated by gravitational settling—is ...
openaire   +1 more source

Forging Neon-distilling White Dwarfs in the Stellar Engulfments of Helium White Dwarfs

The Astrophysical Journal
Once carbon–oxygen white dwarfs cool sufficiently, they crystallize from the inside out. If the white dwarf is rich enough in ^22 Ne, these crystallized solids are buoyant and rapidly rise, efficiently liberating potential energy, which may halt the ...
Nicholas Z. Rui, Jim Fuller
doaj   +1 more source