Results 131 to 140 of about 1,877,533 (362)
Measurements of Physical Parameters of White Dwarfs: A Test of the Mass–Radius Relation [PDF]
, 2017 We present a detailed spectroscopic and photometric analysis of 219 DA and DB white dwarfs for which trigonometric parallax measurements are available.
Antoine B'edard +2 more
semanticscholar +1 more source
Magnetars and white dwarf pulsars [PDF]
International Journal of Modern Physics D, 2016 The anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) are a class of pulsars understood as neutron stars (NSs) with super strong surface magnetic fields, namely [Formula: see text][Formula: see text]G, and for that reason are known as magnetars.
Manuel Malheiro +2 more
openaire +3 more sources
Comparison of White Dwarf Mass Determinations [PDF]
arXiv, 2005 White dwarf masses can be determined in several ways. Here we compare masses obtained from Balmer line spectroscopy with those derived from trigonometric parallax measurements for an ensemble of cool hydrogen-atmosphere white dwarfs.
arxiv
A Common Origin of Magnetism from Planets to White Dwarfs [PDF]
, 2017 Isolated magnetic white dwarfs have field strengths ranging from kilogauss to gigagauss. However, the origin of the magnetic field has not been hitherto elucidated.
J. Isern +3 more
semanticscholar +1 more source
Battery Energy, EarlyView.We present an economically viable approach for synthesizing carbon nanomaterials derived from discarded cigarette filters, an abundant environmental pollutant. The resulting material exhibits desirable characteristics, including a well‐defined stacking structure, high porosity, and a substantial specific surface area, making it suitable as an active ...
Akash Sivanandan +5 more
wiley +1 more source
Massive White Dwarfs in the 100 pc Sample: Magnetism, Rotation, Pulsations, and the Merger Fraction
The Astrophysical JournalWe present a detailed model atmosphere analysis of massive white dwarfs with M > 0.9 M _⊙ and T _eff ≥ 11,000 K in the Montreal White Dwarf Database 100 pc sample and the Pan-STARRS footprint.
Gracyn Jewett +8 more
doaj +1 more source
Throwing Icebergs at White Dwarfs [PDF]
, 2017 White dwarfs (WDs) have atmospheres that are expected to consist nearly entirely of hydrogen and helium, since heavier elements will sink out of sight on short timescales.
A. Stephan, S. Naoz, B. Zuckerman
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
SPIN AND MAGNETISM OF WHITE DWARFS [PDF]
The Astrophysical Journal, 2015 The magnetism and rotation of white dwarf (WD) stars are investigated in relation to a hydromagnetic dynamo operating in the progenitor during shell burning phases. The downward pumping of angular momentum in the convective envelope, in combination with the absorption of a planet or tidal spin-up from a binary companion, can trigger strong dynamo ...
Yevgeni Kissin, Christopher Thompson
openaire +3 more sources
Copper in cancer: friend or foe? Metabolism, dysregulation, and therapeutic opportunities
Cancer Communications, EarlyView.Abstract Copper, one of the essential nutrients for the human body, acts as an electron relay in multiple pathways due to its redox properties. Both deficiencies and excesses of copper lead to cellular fragility. Therefore, it can manifest pro‐ and anti‐cancer properties in tumors. Therefore, it is crucial to clarify the copper activity within the cell.
Dan Shan +13 more
wiley +1 more source