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Modeling CO Emission: I. CO as a Column Density Tracer and the X-Factor in Molecular Clouds
Rahul Shetty, Simon C. Glover, Cornelis P. Dullemond +1
Theoretical and observational investigations have indicated that the abundance of carbon monoxide (CO) is very sensitive to intrinsic properties of the gaseous medium, such as dens…
Effects of Varying the Three-Body Molecular Hydrogen Formation Rate in Primordial Star Formation
Matthew J. Turk, Paul Clark, S. C. O. Glover +4
The transformation of atomic hydrogen to molecular hydrogen through three-body reactions is a crucial stage in the collapse of primordial, metal-free halos, where the first generat…
Hierarchical Stellar Structures in the Local Group Dwarf Galaxy NGC 6822
Dimitrios A. Gouliermis, Stefan Schmeja, Ralf S. Klessen +2
We present a comprehensive study of the star cluster population and the hierarchical structure in the clustering of blue stars with ages <~ 500 Myr in the Local Group dwarf irregul…
Stellar and substellar initial mass function: a model that implements gravoturbulent fragmentation and accretion
Todor Veltchev, Ralf S. Klessen, Paul C. Clark
In this work, we derive the stellar initial mass function (IMF) from the superposition of mass distributions of dense cores, generated through gravoturbulent fragmentation of unsta…
The Interplay of Magnetic Fields, Fragmentation and Ionization Feedback in High-Mass Star Formation
Thomas Peters, Robi Banerjee, Ralf S. Klessen +1
Massive stars disproportionately influence their surroundings. How they form has only started to become clear recently through radiation gas dynamical simulations. However, until n…
Mass-density relationship in molecular cloud clumps
Sava Donkov, Todor Veltchev, Ralf S. Klessen
We study the mass-density relationship n ~ m^x in molecular cloud condensations (clumps), considering various equipartition relations between their gravitational, kinetic, internal…