17 citations · 17 across the 2 of their papers we have counts for
6 papers
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…
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…
Video analysis of the damped oscillations of Pohl's pendulum
Ivan Z. Stefanov, Nikolay Denev, Sava Donkov
In this paper problems that arose with the introduction of distance learning in physics at the Technical University of Sofia due to the COVID-19 pandemic and the imposition of vide…
Statistical link between the structure of molecular clouds and their density distribution
Sava Donkov, Todor V. Veltchev, Ralf S. Klessen
We introduce the concept of a class of equivalence of molecular clouds represented by an abstract spherically symmetric, isotropic object. This object is described by use of abstra…
Modeling of molecular clouds with formation of prestellar cores
Sava Donkov, Orlin Stanchev, Todor V. Veltchev
We develop a statistical approach for description of dense structures (cores) in molecular clouds that might be progenitors of stars. Our basic assumptions are a core mass-density…