Results 201 to 210 of about 693 (229)

The accretion geometry of intermediate polars (DQ her stars)

Advances in Space Research, 1988
The Cataclysmic Variables (CV) are interacting binary systems in which a white dwarfstar accretes matter from a red dwarf companion that is filling its Roche limiting surface (for reviews see /1/ /2/ /3/). It has become apparent in recent years that the white dwarfstar in some CV has a magnetic field which is strong enough to influence the flow of ...
K.O. Mason, S.R. Rosen, C. Hellier
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The DQ Herculis stars

Publications of the Astronomical Society of the Pacific, 1994
We review the properties of the DQ Herculis stars: cataclysmic variables containing an accreting, magnetic, rapidly rotating white dwarf. These stars are characterized by strong X-ray emission, high-excitation spectra, and very stable optical and X-ray pulsations in their light curves. There is considerable resemblance to their more famous cousins, the
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Research on the dq coordinate transform in the six-phase double star windings shifted by 30° synchronous generators with axial magnetic field

SPIE Proceedings, 2006
As an intermediate frequency power source, the double star windings shifted by 30° synchronous generator with axial magnetic field (DSWAMF) is widely used in the different areas. Using the generalized inverse, the transformation matrix of double windings synchronous generators with two Y-connected 3-phase symmetrical windings displaced in turn by 30 ...
Xiangnan Bian, Qishuang Ma
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A high frequency of the A30, B18, DR3, DRw52, DQw2 extended haplotype in Sardinian celiac disease patients: Further evidence that disease susceptibility is conferred by DQ A1*0501, B1*0201

Tissue Antigens, 1992
Abstract: This study characterizes by serological and molecular methods the HLA class I and class II alleles in a group of celiac disease children, their parents and a control group of Sardinian descent. We found the DR3‐DQw2 haplotype in all patients which was, in almost all cases (84%), associated with the HLA‐A30, B18, DR3, DRw52, DQw2 extended ...
CONGIA M, FRAU F, LAMPIS R, FRAU R, MELE R, CUCCO F, MUNTONI F, PORCU S, BOI F, CONTU L, LA NASA, GIORGIO, MULARGIA M, PIRASTU M, CAO A, DE VIRGILIS S.   +14 more
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Photometry of the New DQ HER Star, RX J0558.0+5353

Publications of the Astronomical Society of the Pacific, 1996
Times series CCD photometry of RX J0558.0+5353 reveals optical variations similar to the X-ray variations seen by ROSAT. These variations are about 0.04 magnitudes (semiamplitude) in unfiltered light. Fourier analysis of these time series indicates that the rotation period of the white dwarf is twice the reported X-ray period.
openaire   +1 more source

Discovery of Oxygen in the DQ White Dwarf Star G 227-5 (PG 1727+560): A Progress Report

2003
For many years it has been common knowledge that white dwarf stars have “carbon-oxygen” cores. But for equally many years, the ratio of carbon to oxygen in these cores has been essentially unknown. In recent years, the question of the interior chemical composition of white dwarf stars has become of interest for a variety of reasons that extend beyond ...
Harry L. Shipman, J. L. Provencal, James MacDonald   +2 more
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Recent Developments in the Theory of AM Her And DQ Her Stars

1985
We describe a number of advances in the theory of accreting magnetic white dwarfs, and discuss several unresolved issues concerning these stars.
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General Discussion on DQ Her Stars

1985
Donald Q. Lamb, Joseph Patterson
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Probing the interior physics of stars through asteroseismology

Reviews of Modern Physics, 2021
Conny Aerts
exaly  

Superflares on solar-type stars

Nature, 2012
Yuta Notsu, Takashi Nagao, Hiroyuki Maehara   +2 more
exaly