Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Filaments, Collapse and Outflows in Massive Star Formation   We present results from our numerical simulations of collapsing massive
molecular cloud cores. These numerical calculations show that massive stars
assemble quickly with mass accretion rates exceeding 10^-3 Msol/yr and confirm
that the mass accretion during the collapsing phase is much more efficient than
predicted by selfsimilar collapse solutions, dM/dt ~ c^3/G. We find that during
protostellar assembly out of a non-turbulent core, the mass accretion reaches
20 - 100 c^3/G. Furthermore, we explore the self-consistent structure of
bipolar outflows that are produced in our three dimensional magnetized collapse
simulations. These outflows produce cavities out of which radiation pressure
can be released, thereby reducing the limitations on the final mass of massive
stars formed by gravitational collapse.
  Additional enhancement of the mass accretion rate comes from accretion along
filaments that are built up by supersonic turbulent motions. Our numerical
calculations of collapsing turbulent cores result in mass accretion rates as
high as 10^-2 Msol/yr.

12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org