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The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing
Open accessAbstract
The probability density function (PDF) of the gas density in turbulent supersonic flows is investigated with high-resolution numerical simulations. In a systematic study, we compare the density statistics of compressible turbulence driven by the usually adopted solenoidal forcing (divergence-free) and by compressive forcing (curl-free). Our results are in agreement with studies using solenoidal forcing. However, compressive forcing yields a significantly broader density distribution with standard deviation ~3 times larger at the same rms Mach number. The standard deviation-Mach number relation used in analytical models of star formation is reviewed and a modification of the existing expression is proposed, which takes into account the ratio of solenoidal and compressive modes of the turbulence forcing.
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Cited by
Federrath, C., Roman-Duval, J., Klessen, R. S., Schmidt, W., & Mac Low, M.-M. (2010) · Astronomy and Astrophysics · doi:10.1051/0004-6361/200912437 · Cited by 846
Self-citationProbing the evolution of molecular cloud structure: From quiescence to birth
Kainulainen, J., Beuther, H., Henning, T., & Plume, R. (2009) · Astronomy & Astrophysics · doi:10.1051/0004-6361/200913605 · Cited by 440
Phantom: A Smoothed Particle Hydrodynamics and Magnetohydrodynamics Code for Astrophysics
Price, D. J., Wurster, J., Tricco, T. S., Nixon, C., Toupin, S., Pettitt, A., Chan, C., Mentiplay, D., Laibe, G., Glover, S., et al. (2018) · Publications of the Astronomical Society of Australia · doi:10.1017/pasa.2018.25 · Cited by 429
Self-citationKruijssen, J. M. D. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.21923.x · Cited by 424
ON THE STAR FORMATION EFFICIENCY OF TURBULENT MAGNETIZED CLOUDS
Federrath, C., & Klessen, R. S. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/763/1/51 · Cited by 403
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Metadata
- Authors
- Federrath, C., Klessen, R. S., & Schmidt, W.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2008-10-21
- Volume
- 688
- Issue
- 2
- Pages
- L79-L82
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1977046610
- Cited by
- 524
- References
- 0
- FWCI
- 12.97
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Federrath, C., Klessen, R. S., & Schmidt, W. (2008). The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing. The Astrophysical Journal. https://doi.org/10.1086/595280
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