Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..291k&link_type=abstract
Nature (ISSN 0028-0836), vol. 313, Jan. 24, 1985, p. 291, 292.
Astronomy and Astrophysics
Astrophysics
18
Dwarf Novae, Stellar Oscillations, X Ray Sources, Astrophysics, Energy Transfer, Magnetic Effects, Periodic Variations, Stellar Models, White Dwarf Stars
Scientific paper
A natural explanation for the quasi-periodic oscillations seen in soft X-ray observations of dwarf novae at outburst is presented in terms of a recent model which suggests that soft X-ray production is controlled largely by transport processes into the white-dwarf body. A weak magnetic field anchored in the degenerate core of a white dwarf will produce coherent pulsing in soft but not in hard X-rays; this may be occurring in the DQ Her systems. If the fields are transient and generated by dynamo action in the white dwarf envelope, quasi-periodic quasi-coherent soft X-ray pulsations will naturally result, again without any accompanying hard X-ray pulsation.
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