Results 151 to 160 of about 1,877,533 (362)
THE EFFECT OF 22Ne DIFFUSION IN THE EVOLUTION AND PULSATIONAL PROPERTIES OF WHITE DWARFS WITH SOLAR METALLICITY PROGENITORS [PDF]
, 2016 Because of the large neutron excess of 22Ne, sedimentation of this isotope occurs rapidly in the interior of white dwarfs. This process releases an additional amount of energy, thus delaying the cooling times of the white dwarf.
M. Camisassa +7 more
semanticscholar +1 more source
White-dwarf asteroseismology: An update [PDF]
Proceedings of the International Astronomical Union, 2019 AbstractThe vast majority of stars that populate the Universe will end their evolution as white-dwarf stars. Applications of white dwarfs include cosmochronology, evolution of planetary systems, and also as laboratories to study non-standard physics and crystallization. In addition to the knowledge of their surface properties from spectroscopy combined
openaire +4 more sources
The Solar Neighborhood. XXI. Parallax Results from the CTIOPI 0.9m Program: 20 New Members of the 25 Parsec White Dwarf Sample [PDF]
, 2009 We present accurate trigonometric parallaxes for 20 new members of the 25 pc white dwarf sample as part of the DENSE project (Discovery and Evalution of Nearby Stellar Embers, http://www.DenseProject.com). Previously, there were a total of 112 white dwarf systems with trigonometric parallaxes placing them within 25 pc and of these, 99 have ...
arxiv +1 more source
White dwarf dynamical interactions
, 2023 Merging white dwarfs is a promising channel to trigger Type Ia supernovae, known as the double degenerate scenario. Supernovae are stellar explosions that radiate as much energy as any ordinary star is expected to emit over its entire life span, outshining briefly the whole hosting galaxy.
openaire +4 more sources
Branes constrictions with White Dwarfs [PDF]
The European Physical Journal C, 2015 7 pages, 3 figures.
openaire +3 more sources
Understanding white dwarf binary evolution with white dwarf/main sequence binaries: first results from SEGUE [PDF]
arXiv, 2006 Close white dwarf binaries make up a wide variety of objects such as double white dwarf binaries, which are possible SN Ia progenitors, cataclysmic variables, super soft sources, or AM CVn stars. The evolution and formation of close white dwarf binaries crucially depends on the rate at which angular momentum is extracted from the binary orbit.
arxiv
A wide binary trigger for white dwarf pollution [PDF]
, 2015 Metal pollution in white dwarf atmospheres is likely to be a signature of remnant planetary systems. Most explanations for this pollution predict a sharp decrease in the number of polluted systems with white dwarf cooling age. Observations do not confirm this trend, and metal pollution in old (1-5 Gyr) white dwarfs is difficult to explain.
arxiv +1 more source
International Journal of Eating Disorders, EarlyView.ABSTRACT Objective Having both an eating disorder (ED) and borderline personality disorder (BPD) is associated with heightened clinical complexity, high levels of distress, and challenges in treatment. This study sought to qualitatively investigate the experiences of women with an ED and comorbid BPD as they undergo ED treatment, aiming to better ...
Alexia E. Miller +5 more
wiley +1 more source
Feminist Anthropology, EarlyView.Abstract Pre‐exposure prophylaxis (PrEP) is an antiretroviral drug that effectively prevents an HIV infection, which German statutory health insurance has covered since 2019. The drug's use in Germany has (re)surfaced ambivalent emotions: hopes for an HIV/AIDS‐free future and sexual liberation rub against enduring worries and moralizations of ...
Max Schnepf
wiley +1 more source
Searching for strange quark matter objects among white dwarfs
Physics Letters B, 2022 The ground state of matter may be strange quark matter (SQM), not hadronic matter. A whole sequence of SQM objects, ranging from strange quark stars and strange quark dwarfs to strange quark planets, can stably exist according to this SQM hypothesis.
Abdusattar Kurban +3 more
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