4 papers · 1 filter
Periodic Microvariation of B416, a New LBV in M33
Ohad Shemmer, Elia M. Leibowitz, Paula Szkody
We report optical photometric and spectroscopic observations of the M33 star B416, establishing it as the fifth identified LBV in that galaxy. The B magnitude of the star varies wi…
Spectral Energy Distributions and Light Curves of GRB 990123 and its Afterglow
T. J. Galama, M. S. Briggs, R. A. M. J. Wijers +38
Gamma-ray bursts (GRBs) are thought to result from the interaction of an extremely relativistic outflow interacting with a small amount of material surrounding the site of the expl…
Novae Crossing the Thermal Stability Line
A. Retter, T. Naylor, E. M. Leibowitz
A method, based on the disc instability model, for testing the thermal stability of Cataclysmic Variables (CVs), is presented. It is shown that the border line between thermal stab…
The Presence of Accretion Disks in Novae Shortly After their Outbursts
A. Retter, E. M. Leibowitz
It was believed, with little theoretical basis, that the accretion disk (AD) is destroyed in nova outbursts, and recovers only a few decades later. In my thesis I tried to find obs…