New deep minimum of Romano's Star in M33
Scritto il 11 Feb 2014 alle 01:40 in Pubblicazioni
After the luminosity minimum of 2007-2008 (V=18.6, Polcaro et al. 2011,
AJ, 141, 18) and a moderate luminosity maximum at beginning 2011
(V=17.8), the Luminous Blue Variable GR290/Romano’s Star in M33 has
reached a new deep minimum with V=18.7 and R=18.4 in December 2013 which
appears to be the deepest so far recorded in its known light history.
Significant luminosity oscillations have been observed during the
2011-2013 declining phase.