Results 131 to 140 of about 1,989,293 (378)
A Dark Spot on a Massive White Dwarf [PDF]
, 2015 We present the serendipitous discovery of eclipse-like events around the massive white dwarf SDSS J152934.98+292801.9 (hereafter J1529+2928). We selected J1529+2928 for time-series photometry based on its spectroscopic temperature and surface gravity ...
Bell, Keaton J. +9 more
core +2 more sources
Characterizing Accreting Double White Dwarf Binaries with the Laser Interferometer Space Antenna and Gaia [PDF]
, 2017 We demonstrate a method to fully characterize mass-transferring double white dwarf (DWD) systems with a helium-rich (He) white dwarf (WD) donor based on the mass–radius (M–R) relationship for He WDs. Using a simulated Galactic population of DWDs, we show
K. Breivik +5 more
semanticscholar +1 more source
Highlights of Astronomy, 1980 It has been known for a long time that white dwarfs are pulsationally unstable if nuclear burning takes place in their envelopes. Perturbation of energy generation rate promotes pulsational instability and this effect is frequently referred to as ε-mechanism.
openaire +2 more sources
The Physics of Crystallizing White Dwarfs [PDF]
The Astrophysical Journal, 1997 Accepted for publication in ApJ (16 pages, 1 figure, aasms4)
Enrique García-Berro +3 more
openaire +3 more sources
Annals of Neurology, EarlyView.Objective In men and women, sex steroid hormones have been associated with increased risk of Alzheimer's disease (AD) dementia. We aimed to investigate the influence of midlife testosterone and sex hormone binding globulin (SHBG) levels on later‐life in vivo markers of β‐amyloid (Aβ) and tau deposition in clinically healthy older men. Methods This time‐
Rachel F. Buckley +16 more
wiley +1 more source
Ages of White Dwarf-Red Subdwarf Systems
, 2005 We provide the first age estimates for two recently discovered white dwarf-red subdwarf systems, LHS 193AB and LHS 300AB. These unusual systems provide a new opportunity for linking the reliable age estimates for the white dwarfs to the (measurable ...
Bessel M. S. +9 more
core +2 more sources
Eclipsing binary and white dwarf features associated with K2 target EPIC251248385 [PDF]
, 2019 White dwarfs, remnants of Sun-like stars which have completed their evolution, are one of the most common types of stars in space. Despite this, very few white dwarfs have been observed in transiting or eclipsing systems, and only two planetary systems ...
Armstrong, James D. +5 more
core +1 more source
PLANETARY ENGULFMENT AS A TRIGGER FOR WHITE DWARF POLLUTION [PDF]
, 2016 The presence of a planetary system can shield a planetesimal disk from the secular gravitational perturbations due to distant outer massive objects (planets or stellar companions).
C. Petrovich, D. Muñoz
semanticscholar +1 more source
Le Journal de Physique Colloques, 1980 The thermal properties and neutrino emissivity of matter in the dense, degenerate cores of white dwarfs, together with efficient heat transport through the high-density envelopes of these stars, affect the theoretical white dwarf luminosity function.
openaire +1 more source
The Anatomical Record, EarlyView.Abstract The pygmy sperm whale (Kogia breviceps) possesses an exocrine gland associated with its false gill slit pigmentation pattern. The cervical gill slit gland is a compound tubuloalveolar gland that produces a holocrine secretion and displays maturational changes in size and secretory histology. While the morphology of the cervical gill slit gland
Tiffany F. Keenan +13 more
wiley +1 more source