%0 Journal Article %1 citeulike:12298122 %A Moraghan, A. %A Kim, J. %A Yoon, S. J. %D 2013 %J Mon. Not. Roy. Astron. Soc. %K imported %R 10.1093/mnrasl/slt044 %T Density distributions of outflow-driven turbulence %U http://dx.doi.org/10.1093/mnrasl/slt044 %X Protostellar jets and outflows are signatures of star formation and promising mechanisms for driving supersonic turbulence in molecular clouds. We quantify outflow-driven turbulence through three-dimensional numerical simulations using an isothermal version of the robust total variation diminishing code. We drive turbulence in real space using a simplified spherical outflow model, analyse the data through density probability distribution functions (PDFs), and investigate the core formation rate per free-fall time (CFR<SUB>ff</SUB>). The real-space turbulence-driving method produces a negatively skewed density PDF possessing an enhanced tail on the low-density side. It deviates from the log-normal distributions typically obtained from Fourier-space turbulence driving at low densities, but can provide a good fit at high densities, particularly in terms of mass-weighted rather than volume-weighted density PDF. Due to this fact, we suggest that the CFR<SUB>ff</SUB> determined from a Fourier-driven turbulence model could be comparable to that of our particular real-space-driving model, which has a ratio of solenoidal to compressional components from the resulting turbulence velocity fields of &tilde;0.6.

@article{citeulike:12298122, abstract = {{Protostellar jets and outflows are signatures of star formation and promising mechanisms for driving supersonic turbulence in molecular clouds. We quantify outflow-driven turbulence through three-dimensional numerical simulations using an isothermal version of the robust total variation diminishing code. We drive turbulence in real space using a simplified spherical outflow model, analyse the data through density probability distribution functions (PDFs), and investigate the core formation rate per free-fall time (CFR<SUB>ff</SUB>). The real-space turbulence-driving method produces a negatively skewed density PDF possessing an enhanced tail on the low-density side. It deviates from the log-normal distributions typically obtained from Fourier-space turbulence driving at low densities, but can provide a good fit at high densities, particularly in terms of mass-weighted rather than volume-weighted density PDF. Due to this fact, we suggest that the CFR<SUB>ff</SUB> determined from a Fourier-driven turbulence model could be comparable to that of our particular real-space-driving model, which has a ratio of solenoidal to compressional components from the resulting turbulence velocity fields of \&tilde;0.6.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {{Moraghan}, A. and {Kim}, J. and {Yoon}, S. J.}, biburl = {https://www.bibsonomy.org/bibtex/2c2b669f8ca95c2b209e4924654585fe8/ericblackman}, citeulike-article-id = {12298122}, citeulike-linkout-0 = {http://arxiv.org/abs/1304.6490}, citeulike-linkout-1 = {http://arxiv.org/pdf/1304.6490}, citeulike-linkout-2 = {http://dx.doi.org/10.1093/mnrasl/slt044}, citeulike-linkout-3 = {http://adsabs.harvard.edu/cgi-bin/nph-bib\_query?bibcode=2013MNRAS.tmpL..92M}, day = 24, doi = {10.1093/mnrasl/slt044}, eprint = {1304.6490}, interhash = {2c417a4ad78618c62c73821ddddd068c}, intrahash = {c2b669f8ca95c2b209e4924654585fe8}, issn = {1745-3925}, journal = {Mon. Not. Roy. Astron. Soc.}, keywords = {imported}, month = apr, posted-at = {2013-04-25 04:32:05}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{Density distributions of outflow-driven turbulence}}, url = {http://dx.doi.org/10.1093/mnrasl/slt044}, year = 2013 }