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Hydrogen molecules and the radiative cooling of pregalactic shocks
Abstract
The nonequilibrium radiative cooling, recombination, and molecule formation behind steady state shock waves in a gas of primordial composition have been calculated in detail for a number of cases. The authors have solved the rate equations for these processes, together with the hydrodynamical conservation equations. Such shock waves are relevant to a wide range of theories of galaxy and pregalactic star formation. A purely atomic gas of H and He which is shock-heated to temperatures above 104K is assumed. The results indicate that formation of H2 molecules in the post-shock gas may be quite common for a significant range of shock velocities. The extra cooling resulting from H2 formation greatly reduces previous estimates of the characteristic gravitational scale length and the characteristic mass subject to gravitational instability in these postshock regions.
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Citations
Cited by
Bromm, V., & Larson, R. B. (2004) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.42.053102.134034 · Cited by 957
The fragmentation of pre-enriched primordial objects
Bromm, V., Ferrara, A., Coppi, P. S., & Larson, R. B. (2001) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2001.04915.x · Cited by 414
Protostellar Feedback Halts the Growth of the First Stars in the Universe
Hosokawa, T., Omukai, K., Yoshida, N., & Yorke, H. W. (2011) · Science · doi:10.1126/science.1207433 · Cited by 386
Atomic and molecular processes in the early Universe
Lepp, S., Stancil, P. C., & Dalgarno, A. (2002) · Journal of Physics B: Atomic, Molecular and Optical Physics · doi:10.1088/0953-4075/35/10/201 · Cited by 320
Shang, C., Bryan, G. L., & Haiman, Z. (2010) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2009.15960.x · Cited by 300
Metadata
- Authors
- Shapiro, P. R., & Kang, H.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1987-07
- Volume
- 318
- Pages
- 32
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2007687569
- Cited by
- 322
- References
- 0
- FWCI
- 2.66
- Type
- journal article
- Language
- en
- Open access
- closed
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