24 citations · 148 across the 24 of their papers we have counts for
24 papers
On the evolution of the mass density profile of dense molecular clouds
S. Donkov, I. Zh. Stefanov, T. V. Veltchev +1
We aim to obtain the equations which govern the evolution of the mass density profile of a dense irrotational molecular cloud (MC). Our study is based on the notion of "ensemble of…
Multiple power-law tails in the density and column-density distribution in contracting star-forming clumps
Todor V. Veltchev, Philipp Girichidis, Lyubov Marinkova +3
We present a numerical study of the evolution of power-law tails (PLTs) in the (column-)density distributions (-PDF, -PDF) in contracting star-forming clumps in primordial ga…
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…
Density distribution function of a self-gravitating isothermal turbulent fluid in the context of molecular clouds ensembles -- III. Virial analysis
S. Donkov, I. Zh. Stefanov, T. V. Veltchev +1
In the present work we apply virial analysis to the model of self-gravitating turbulent cloud ensembles introduced by Donkov \& Stefanov in two previous papers, clarifying some asp…
Extraction of a second power-law tail of the density distribution in simulated clouds
L. Marinkova, T. Veltchev, Ph. Girichidis +1
The emergence and development of a power-law tail (PLT) at the high-density end of the observed column-density distribution is thought to be indicative for advanced evolution of st…