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Thermal Balance in Dense Molecular Clouds: Radiative Cooling Rates and Emission-Line Luminosities
Abstract
We consider the radiative cooling of fully shielded molecular astrophysical gas over a wide range of temperatures (10K ≤ T ≤ 2500K) and H2 densities (l03 cm-3 ≤ n(H2) ≤ 1010 cm-3). Our model for the radiative cooling of molecular gas includes a detailed treatment of the interstellar chemistry that determines the abundances of important coolant molecules, and a detailed treatment of the excitation of the species H2, CO, H2O, HC1, O2, C, O, and their isotopic variants where important. We present results for the total radiative cooling rate and for the cooling rate due to individual coolant species, as a function of the gas temperature, density, and optical depth. We have also computed the individual millimeter, submillimeter, and far-infrared line strengths that contribute to the total radiative cooling rate, and we have obtained example spectra for the submillimeter emission expected from molecular cloud cores. Many of the important cooling lines will be detectable using the Infrared Space Observatory and the Submillimeter Wave Astronomy Satellite.
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Citations
Cited by
Cool Gas in High-Redshift Galaxies
Carilli, C. L., & Walter, F. (2013) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082812-140953 · Cited by 1,107
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
An Origin of Supersonic Motions in Interstellar Clouds
Koyama, H., & Inutsuka, S.-I. (2001) · The Astrophysical Journal · doi:10.1086/338978 · Cited by 368
Schinnerer, E., Meidt, S. E., Pety, J., Hughes, A., Colombo, D., García-Burillo, S., Schuster, K. F., Dumas, G., Dobbs, C. L., Leroy, A. K., et al. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/779/1/42 · Cited by 254
Evidence for a Geometrically Thick Self‐Gravitating Accretion Disk in NGC 3079
Kondratko, P. T., Greenhill, L. J., & Moran, J. M. (2005) · The Astrophysical Journal · doi:10.1086/426101 · Cited by 140
Metadata
- Authors
- Neufeld, D. A., Lepp, S., & Melnick, G. J.
- Venue
- The Astrophysical Journal Supplement Series
- Publisher
- American Astronomical Society
- Published
- 1995-09
- Volume
- 100
- Pages
- 132
- ISSN
- 0067-0049 (ISSN-L)
- 1538-4365
- OpenAlex
- W2063395797
- Cited by
- 272
- References
- 0
- Type
- conference abstract
- Language
- en
- Open access
- closed
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- Neufeld, D. A., Lepp, S., & Melnick, G. J. (1995). Thermal Balance in Dense Molecular Clouds: Radiative Cooling Rates and Emission-Line Luminosities. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/192211
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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