Evidence for Magnetic Accretion during the 2002 Optical Outburst of the Old Nova GK Persei (1901)

Details Evidence for Magnetic Accretion during the 2002 Optical Outburst of the Old Nova GK Persei (1901) Evidence for Magnetic Accretion during the 2002 Optical Outburst of the Old Nova GK Persei (1901)

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasp..115..474b&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 115, Issue 806, pp. 474-478.

Astronomy and Astrophysics

Astronomy

3

Stars: Novae, Cataclysmic Variables, Stars: White Dwarfs

Scientific paper

Spectra of the old nova GK Per taken at the beginning and during the rise of the 2002 dwarf nova-like outburst reveal that halfway to light maximum, most of the accretion disk had already changed from the ``low'' to the ``high state.'' The evolution of emission-line fluxes, equivalent widths, and FWHMs confirms the dwarf nova nature of the outburst. The emission-line profiles at midrise show the presence of an asymmetric broad component that we interpret as the signature of increased mass accretion onto the magnetic white dwarf.

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