Journal Club


"On the Periods and Nature of Superhumps"

Jean-Pierre Lasota-Hirszowicz (CAMK, Warsaw)

It is commonly accepted that the periods of superhumps can be satisfactorily explained within a model involving apsidal motion of the accretion disk provided the frequency of the apsidal motion in addition to the dynamical term includes also the pressure effects. Using a larger sample of systems with reliable mass ratios it is shown, however, that this view is not true and the model requires further modifications. The talk will be based on the work of J. Smak,


"The Mass-loss History of the Red Hypergiant VY CMa"

Miljenko Cemeljic (NCAC, Warsaw)

The talk is based on: