3 citations · 3 across the 3 of their papers we have counts for
5 papers
First law of thermodynamics for interacting charged black holes and applications
Qing Han, Marcus Khuri, Gilbert Weinstein +1
We derive a mass variation identity expressing the first law of black hole thermodynamics for asymptotically flat, stationary, axisymmetric Einstein-Maxwell solutions with multiple…
Differential and integral scaling laws of the mass density of molecular clouds
Sava Donkov, Valentin Kopchev, Ivan Z. Stefanov +1
In this work we investigate the mass density - size scaling law in molecular clouds (MCs). This relation reflects the fractal nature of MCs and plays a key role for understanding t…
Density profile of a self-gravitating polytropic turbulent fluid in a rotating disk near to the cloud core
S. Donkov, I. Zh. Stefanov, T. V. Veltchev +1
We obtain two equations (following from two different approaches) for the density profile in a self-gravitating polytropic cylindrically symmetric and rotating turbulent gas disk.…
Thermodynamics of fluid elements in the context of saturated isothermal turbulence in molecular clouds
Sava Donkov, Ivan Zh. Stefanov, Todor V. Veltchev
The presented paper is an attempt to investigate the dynamical states of an hydrodynamical isothermal turbulent self-gravitating system using some powerful tools of the classical t…
Isochoric cooling of air in the University Physics laboratory
Ivan Z. Stefanov, Sava Donkov, Nikolay Denev
In this paper an alternative way of conducting the physics laboratory exercise for determining the adiabatic index of air using the Clement -- Desormes method is proposed. The proc…