Periodic Outbursts in the Old Nova V446 Herculis

Details Periodic Outbursts in the Old Nova V446 Herculis Periodic Outbursts in the Old Nova V446 Herculis

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...446..838h&link_type=abstract

Astrophysical Journal v.446, p.838

Astronomy and Astrophysics

Astronomy

13

Stars: Novae, Cataclysmic Variables, Stars: Individual Constellation Name: V446 Herculis

Scientific paper

We present data showing that over the last 4 yr V446 Her (= Nova Her 1960) has had outbursts or flares at a mean interval of 23 days with an amplitude of ˜1.5 mag. These events vary in width from 5 to 11 days. During at least some periods of time, the recurrence interval is stable to within the observational error (typically ±3 days). The spectrum of V446 Her in quiescence is shown to have an excitation level intermediate to that of dwarf novae- and nova-like cataclysmic variables. This fact, along with other evidence, leads us to suggest that these outbursts may be due to mass transfer events rather than dwarf nova-like accretion disk instabilities.

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