Results 31 to 40 of about 69,486 (315)
ON THE EVOLUTION OF MAGNETIC WHITE DWARFS [PDF]
The Astrophysical Journal, 2015 We present the first radiation magnetohydrodynamics simulations of the atmosphere of white dwarf stars. We demonstrate that convective energy transfer is seriously impeded by magnetic fields when the plasma-beta parameter, the thermal to magnetic pressure ratio, becomes smaller than unity.
P.-E. Tremblay +7 more
openaire +4 more sources
Food Science &Nutrition, Volume 11, Issue 1, Page 470-480, January 2023., 2023 The obtained results are useful for designing conservation strategies for the germplasm as well as implementing breeding programs such as introducing cultivars with different goals such as early or late ripening and seedless, non‐astringent, large, and deeper color‐fruits.
Ali Khadivi +3 more
wiley +1 more source
Open Astronomy, 2012 We have analyzed the optical light curve of the symbiotic star V407 Cyg that underwent a classical nova outburst in 2010 March. Being guided by a supersoft X-ray phase observed during days 20-40 after the nova outburst, we are able to reproduce the light
Hachisu I., Kato M.
doaj +1 more source
The WFCAM transit survey and cool white dwarfs
EPJ Web of Conferences, 2013 We present results from our search for cool white dwarfs in the WTS (WFCAM Transit Survey). Repeat observations starting in 2007 allowed to produce deep stacked images in J and measure proper motions.
Pinfield D. +4 more
doaj +1 more source
The White Dwarf Companions of 56 Per and HR 3643 [PDF]
To be published in PASP (March 1996), 1995 We have obtained low-dispersion IUE spectra of the stars 56 Persei (F4 V) and HR 3643 (F7 II), as part of a survey of late-type stars with a 1565 A flux excess in the TD-1 ultraviolet sky survey. The IUE spectrum of each star reveals the presence of a hot white dwarf companion.
arxiv +1 more source
The Temperatures of White Dwarfs in Dwarf Novae [PDF]
International Astronomical Union Colloquium, 1996 AbstractWe attempt to measure the temperature of all the quiescent dwarf novae that have been observed with IUE, by fitting the observed flux distribution of white dwarfs (WDs) with known temperatures. This approach gives results similar to those using much more sophisticated modelling, but allows us to investigate the relationship with system ...
C. La Dous, B. J. M. Hassall
openaire +2 more sources
Cooling Process of White Dwarf Stars in Palatini f(R) Gravity
Universe, 2022 A simple cooling model of white dwarf stars is re-analyzed in Palatini f(R) gravity. Modified gravity affects the white dwarf structures and consequently their ages.
Surajit Kalita +2 more
doaj +1 more source
, 2022 48 pages, 6 figures, Invited (and accepted) chapter for the Handbook of X-ray and Gamma-ray Astrophysics, Editors: Cosimo Bambi, Andrea ...
openaire +2 more sources
Hot white dwarfs and pre-white dwarfs discovered with SALT
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT The Southern African Large Telescope survey of helium-rich hot subdwarfs aims to explore evolutionary pathways among groups of highly evolved stars. The selection criteria mean that several hot white dwarfs and related objects have also been included.
C S Jeffery +5 more
openaire +4 more sources
White dwarfs in the WTS: Eclipsing binaries
EPJ Web of Conferences, 2013 We have identified photometric white dwarf candidates in the WFCAM transit survey through a reduced proper motion versus colour approach. Box-fitting with parameters adjusted to detect the unique signature of a white dwarf + planet/brown dwarf transit ...
Burleigh M.R. +4 more
doaj +1 more source