A remarkable recurrent nova in M 31: The 2010 eruption recovered and evidence of a six-month period

M. Henze, M. J. Darnley, F. Kabashima +3

The Andromeda Galaxy recurrent nova M31N 2008-12a has been caught in eruption nine times. Six observed eruptions in the seven years from 2008 to 2014 suggested a duty cycle of ~1 y…