colour changes

Forums Spectroscopy Request for monitoring of X Per colour changes

Robin Leadbeater

Hi Hugh,

Time to place our bets on which way it will go next season !

A comment from Paul Roche in January:- 

It’s not obvious what’s going on here, as the declining EWs for H alpha and HeI suggest a diminishing disc, but the AAVSO photometry seems to suggest the opposite. We’ll have to keep an eye on things for the rest of the “X Per season” and see if it makes sense when we have a bit more data. It will be interesting to see how the (B-V) and (V-R) colour of the system is behaving, that might reveal a little more about the state of the disc”

There is very little data in other bands in the AAVSO photometry data. Does your continuum data show any colour trends ?