Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...462l..87k&link_type=abstract
Astrophysical Journal Letters v.462, p.L87
Astronomy and Astrophysics
Astronomy
43
Accretion, Accretion Disks, Stars: Binaries: Close, Stars: Individual Alphanumeric: Gro J0422+32, Stars: Individual Constellation Name: Al Comae, Stars: Individual Constellation Name: Uz Bootis, Stars: Novae, Cataclysmic Variables, X-Rays: Stars
Scientific paper
We show that, apart from having in common long intervals between large-amplitude outbursts (without intervening normal outbursts), soft X-ray transients (SXTs) and "tremendous outburst amplitude dwarf novae" (TOADs) have very similar optical light curves, showing glitches and superhumps during the main part of the outbursts, and considerable postoutburst activity in the form of one or more minioutbursts. We propose that these similarities reflect that both SXTs and TOADs have very small mass ratios and very low mass transfer rates. The outbursts of SXTs and TOADs are triggered by a viscous instability and are almost always followed by a tidal instability during which superhumps develop. We suggest that the increased mass accretion during the glitches is caused by enhanced tidal dissipation.
Howell Steve B.
Kuulkers Erik
Paradijs Jan van
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