22 citations · 38 across the 7 of their papers we have counts for
10 papers · 1 filter
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…
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…
Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds
S. Donkov, I. Zh. Stefanov, T. V. Veltchev +1
We obtain an equation for the density profile in a self-gravitating polytropic spherically symmetric turbulent fluid with an equation of state . This is don…
Statistical mass function of prestellar cores from the density distribution of their natal clouds
S. Donkov, T. V. Veltchev, Ph. Girichidis +1
The mass function of clumps observed in molecular clouds raises interesting theoretical issues, especially in its relation to the stellar initial mass function. We propose a statis…
On the extraction of power-law parts of the probability density functions in star-forming clouds
Todor V. Veltchev, Philipp Girichidis, Sava Donkov +5
We present a new approach to extract the power-law part of a density/column-density probability density function (rho-pdf/N-pdf) in star-forming clouds. It is based on the mathemat…
Density distribution function of a self-gravitating isothermal compressible turbulent fluid in the context of Molecular Clouds ensembles II: the contribution of the turbulent term and the potential of the outer shells
Sava Donkov, Ivan Zh. Stefanov
In this paper we continue to investigate the energy conservation equation obtained in our previous work. We set ourselves three new goals. The first one is to rewrite the main equa…