ar X iv : a st ro - p h / 98 05 35 8 v 1 2 8 M ay 1 99 8 Photon Damping of Waves in Accretion Disks

ar X iv : a st ro - p h / 99 05 37 6 v 1 2 8 M ay 1 99 9 A 6 . 4 - hr positive superhump period in TV

ar X iv : a st ro - p h / 98 05 29 9 v 1 2 2 M ay 1 99 8 A Supermassive Black Hole or a Compact Object Without Events Horizon ?

Previously it was shown that gravitation theory allows the ex-istance of supermassive stable compact configurations of the degenerated electronic gas (L.V.Verozub, Astr. Nacr. 317 (1996) 107) without events horizon. In the present paper the simplest model of such kind of objects in gas environment has been considered. It is shown that at the spherically symmetric accretion onto the object the l...

ar X iv : a st ro - p h / 98 05 05 8 v 1 6 M ay 1 99 8 The effects of convection on the colours of A and F stars

We present a discussion on the effects of convection on the uvby colours of A and F stars. The mixing-length theory used in ATLAS9 is compared to the turbulent convection theory of Canuto & Mazzitelli (1991, 1992). Comparison with fundamental stars reveals that colours calculated using the Canuto & Mazzitelli convection theory are generally in better agreement than those obtained using mixing-l...

ar X iv : a st ro - p h / 98 05 03 2 v 1 5 M ay 1 99 8 Why are magnetic Ap stars slowly rotating ?

Observational data on rotation of Ap stars suggest that the bulk of their rotation rates form a separate Maxwellian distribution with an average value 3-4 times lower than the normal star distribution. No evidences for a significant angular momentum (AM) loss on the main sequence (MS) have been found. It is thus concluded that Ap stars must lose a large fraction of their initial angular momentu...

ar X iv : a st ro - p h / 98 05 10 6 v 1 8 M ay 1 99 8 Probing Black - Hole Physics in the Laboratory Using High Intensity Femtosecond Lasers

It is shown how laboratory experiments performed with high intensity femtosecond lasers can probe the physics of black holes in the near-horizon regime. The acceleration generated by the high intensity laser ranging from 10g to more than 10g is identified with the gravitational acceleration at stretched horizons. In the black-hole’s asymptotic region, the stretchedhorizon-reflected light shows ...