Results 61 to 70 of about 116,162 (381)

MAGNETISM OF WHITE DWARFS (intermediate results of a survey for kilogauss magnetic fields in white dwarfs)

Odessa Astronomical Publications, 2017
We shortly present intermidiate results of a survey for weak magnetic fields among degenerate stars (white dwarfs and hot subdwarf stars). Kilogauss upper limits of longitudinal magnetic fields are presented for several brightest DA white dwarfs and new ...
G. Valyavin, S. Bagnulo, S. Fabrika, A. Reisenegger, G. A. Wade, Inwoo Han, D. Monin   +6 more
doaj   +1 more source

Rotation in sdB stars as revealed by stellar oscillations

Open Astronomy, 2018
An interesting opportunity offered by the detection of stellar oscillations is the possibility to infer the internal rotation rate of a star through the so-called rotational splittings. Such seismic measurements remained rather scarce for hot B subdwarf (
Charpinet Stephane, Giammichele Noemi, Zong Weikai, Van Grootel Valérie, Brassard Pierre, Fontaine Gilles   +5 more
doaj   +1 more source

An Out‐of‐Place Etiology: Recognizing FMR1 Premutation in the Memory Clinic

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT The FMR1 gene premutation (55–200 CGG repeats) is usually associated with a wide range of symptoms and phenotypes within the Fragile X‐tremor/ataxia syndrome (FXTAS), but may also manifest as predominant or isolated cognitive decline. We describe three male patients referred for progressive cognitive impairment and behavioral changes. Standard
Guido Greco, Caterina Motta, Enrica Marchionni, Maria Rosaria D'Apice, Carlangelo Carrese, Giuseppe Novelli, Alessandro Martorana, Chiara Giuseppina Bonomi   +7 more
wiley   +1 more source

White Dwarf Central Stars [PDF]

Symposium - International Astronomical Union, 1993
Planetary nebula nuclei on lower luminosity, diagonal tracks in the HR Diagrams are degenerate dwarf stars close to their final radii. For several reasons, these stars have until recently been difficult to identify and study. With the advent of new techniques and technologies, both hydrogen–rich and hydrogen–poor atmospheric sequences have been found.
openaire   +1 more source

White Dwarf/M Dwarf Binaries as Single Degenerate Progenitors of Type Ia Supernovae

, 2012
Limits on the companions of white dwarfs in the single degenerate scenario for the origin of Type Ia supernovae (SNIa) have gotten increasingly tight. The only type of non-degenerate stars that survive the limits on the companions of SNIa in SNR 0509-67 ...
Andronov, Badenes, Badenes, Birkby, Blondin, Bloom, Bochanski, Bochanski, Browning, Campbell, Chatzopoulos, Chomiuk, Dan, Delfosse, Di Stefano, Di Stefano, Falcon, Fryer, Gerardy, Gerardy, González Hernández, González Hernández, Hachisu, Hachisu, Hilton, Höflich, Höflich, Ivanova, J. Craig Wheeler, Kasen, Kerzendorf, Kerzendorf, King, King, Knigge, Law, Leonard, Li, Li, Liebert, Liebert, MacDonald, Maoz, Marietta, Mullan, Napiwotzki, Nielsen, Pan, Patat, Piro, Pritchet, Reiners, Rest, Romani, Schaefer, Schaefer, Schaefer, Schaefer, Shen, Simon, Starrfield, Stassun, Tutukov, van den Heuvel, van Teeseling, Verbunt, Wang, Wheeler, Wheeler, Wheeler, Willems, Wu, Zahn, Zahn   +73 more
core   +1 more source

Detection of Young Massive White Dwarfs in Core-collapsed Globular Cluster NGC 362

The Astrophysical Journal Letters
Core-collapsed globular clusters are ideal targets to explore the presence of stellar collision products. Here, we have studied 17 far-UV bright white dwarf (WD) members in the globular cluster NGC 362 using data obtained from the Ultra Violet Imaging ...
R. K. S. Yadav, Arvind K. Dattatrey, Annapurni Subramaniam, Geeta Rangwal, Ravi S. Singh   +4 more
doaj   +1 more source

White Dwarf Stars as Polytropic Gas Spheres [PDF]

, 2014
We expect that relativistic effects play an important role in compact stars because their electrons are highly degenerate. In this paper, we study the properties of condensed matter in white dwarfs using Newtonian and relativistic polytropic fluid ...
M. Nouh, A. S. Saad, W. H. Elsanhoury, A. Shaker, B. Korany, T. M. Kamel   +5 more
semanticscholar   +1 more source

Mesoporous Carbon Thin Films with Large Mesopores as Model Material for Electrochemical Applications

Advanced Functional Materials, EarlyView.
Mesoporous carbon thin films possessing 70 nm mesopores are prepared on titanium substrates by soft templating of resol resins with a self‐synthesized poly(ethylene oxide)‐block‐poly(hexyl acrylate) block copolymer. A strategy to avoid corrosion of the metal substrate is presented, and the films are extensively characterized in terms of morphology ...
Lysander Q. Wagner, Joshua Schober, Pascal Dippell, Chantal Glatthaar, Smail Mekhilef, David Schäfer, Hannes Hergert, Marcus Rohnke, Matthias T. Elm, Bernd M. Smarsly   +9 more
wiley   +1 more source

Current challenges in the physics of white dwarf stars [PDF]

Physics reports, 2022
D. Saumon, S. Blouin, P. Tremblay
semanticscholar   +1 more source

New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12 [PDF]

, 2015
White dwarfs carry information on the structure and evolution of the Galaxy, especially through their luminosity function and initial-to-final mass relation. Very cool white dwarfs provide insight into the early ages of each population.
S. O. Kepler, I. Pelisoli, D. Koester, G. Ourique, A. Romero, N. Reindl, S. Kleinman, D. Eisenstein, A. Valois, L. A. Amaral   +9 more
semanticscholar   +1 more source