Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-01-08
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
10pages, 8 figures, 1 table; A&A accepted Typographical errors have been attempted to and the original manuscript has been tri
Scientific paper
In this second paper of the sequel of two papers, we further investigate the problem of molecular cloud (MC) collision. Anathpindika (2009) (hereafter paper I) considered highly supersonic cloud collisions and examined the effect of bending and shearing instabilities on the shocked gas slab. We now consider moderately supersonic cloud collisions (precollision cloud velocities of order 1.2 km s$^{-1}$ to 2.4 km s$^{-1}$). In the current paper, we present five SPH simulations of fast head-on and/or off-centre cloud collisions to study the evolution of ram pressure confined gas slabs. The relevant thermodynamics in the problem is simplified by adopting a simple barytropic equation of state. We explore the parameter space by varying the pre-collision velocity and the temperature of the post collision gas slab. The temperature in a pressure compressed gas slab is crucial to its dynamical evolution. The pressure confined gas slabs become Jeans unstable if the average sound crossing time, $t_{cr}$, of putative clumps condensing out of them, is much larger than their free fall time, $t_{ff}$. Self gravitating clumps may spawn multiple/larger $N$-body star clusters. Warmer gas slabs are unlikely to fragment and may end up as diffuse gas clouds.
No associations
LandOfFree
Supersonic Cloud Collision-II does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Supersonic Cloud Collision-II, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supersonic Cloud Collision-II will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-62224