31 citations · 176 across the 12 of their papers we have counts for
12 papers
Bonnor-Ebert sphere collapse in filamentary structures
Stefan Heigl, Andreas Burkert
Star formation within filaments may arise due to the growth of cores according to linear perturbation theory. This implies a minimum core separation, as shorter modes would not be…
Protostellar disk accretion in turbulent filaments
Stefan Heigl, Elena Hoemann, Andreas Burkert
Recent observations of protostellar cores suggest that most of the material in the protostellar phase is accreted along streamers. Streamers in this context are defined as velocity…
Filament fragmentation: Density gradients suppress end dominated collapse
Elena Hoemann, Stefan Heigl, Andreas Burkert
The onset of star formation is set by the collapse of filaments in the interstellar medium. From a theoretical point of view, an isolated cylindrical filament forms cores via the e…
Filament collapse: a two phase process
Elena Hoemann, Stefan Heigl, Andreas Burkert
Using numerical simulations, we investigate the gravitational evolution of filamentary molecular cloud structures and their condensation into dense protostellar cores. One possible…
Taking off the edge -- simultaneous filament and end core formation
Stefan Heigl, Elena Hoemann, Andreas Burkert
Simulations of idealised star-forming filaments of finite length typically show core growth which is dominated by two cores forming at its respective end. The end cores form due to…
Merging Filaments I: A race against collapse
Elena Hoemann, Stefan Heigl, Andreas Burkert
The interstellar medium is characterised by an intricate filamentary network which exhibits complex structures. These show a variety of different shapes (e.g. junctions, rings, etc…
Accretion driven turbulence in filaments II: Effects of self-gravity
Stefan Heigl, Matthias Gritschneder, Andreas Burkert
We extend our previous work on simulations with the code RAMSES on accretion driven turbulence by including self-gravity and study the effects of core formation and collapse. We sh…
Morphology of prestellar cores in pressure confined filaments
Stefan Heigl, Matthias Gritschneder, Andreas Burkert
Observations of prestellar cores in star-forming filaments show two distinct morphologies. While molecular line measurements often show broad cores, submillimeter continuum observa…
Accretion driven turbulence in filaments I: Non-gravitational accretion
Stefan Heigl, Andreas Burkert, Matthias Gritschneder
We study accretion driven turbulence for different inflow velocities in star forming filaments using the code ramses. Filaments are rarely isolated objects and their gravitational…
Prestellar core modeling in the presence of a filament - The dense heart of L1689B
Juergen Steinacker, Aurore Bacmann, Thomas Henning +1
Short version: We apply a new synergetic radiative transfer method: the derived 1D density profiles are both consistent with a cut through the Herschel PACS/SPIRE and JCMT SCUBA-2…
Oscillating Filaments: I - Oscillation and Geometrical Fragmentation
Matthias Gritschneder, Stefan Heigl, Andreas Burkert
We study the stability of filaments in equilibrium between gravity and internal as well as external pressure using the grid based AMR-code RAMSES. A homogeneous, straight cylinder…
Non-linear dense core formation in the dark cloud L1517
Stefan Heigl, Andreas Burkert, Alvaro Hacar
We present a solution for the observed core fragmentation of filaments in the Taurus L1517 dark cloud which previously could not be explained (Hacar et. al 2011). Core fragmentatio…