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Photoelectric heating of interstellar gas
Abstract
Photoelectric emission from interstellar grains and its consequences for the heating and cooling of interstellar gas are reexamined. The physics of photoemission is briefly reviewed, the photoemissive properties of interstellar grains are examined, and the absorption efficiency and total geometric cross section of the grains are estimated. Some aspects of gas-grain interactions are considered, the interstellar UV energy density is discussed, and the grain potential and heating rate are evaluated for the interstellar UV background as well as for a wide range of electron densities and temperatures. Steady-state solutions for the gas are obtained, and their relevance to the interstellar medium is briefly assessed. The time-dependent cooling of a fossil H II region is analyzed, and it is suggested that fossil H II in the wakes of runaway O stars can produce significant amounts of intermediate-temperature (about 500 to 3000 K) H I. It is concluded that: (1) interstellar grains are likely to have effective photoelectric thresholds of approximately 8 eV and (2) photoemission from grains is a major contributor to the heating of the cool phase of the interstellar medium.
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Citations
Cited by
Photochemistry and Astrochemistry: Photochemical Pathways to Interstellar Complex Organic Molecules
Öberg, K. I. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00694 · Cited by 474
Woitke, P., Kamp, I., & Thi, W.-F. (2009) · Astronomy & Astrophysics · doi:10.1051/0004-6361/200911821 · Cited by 399
Walch, S., Girichidis, P., Naab, T., Gatto, A., Glover, S. C. O., Wünsch, R., Klessen, R. S., Clark, P. C., Peters, T., Derigs, D., et al. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv1975 · Cited by 366
“In the runs that we perform with our standard SN rate of 15 Myr−1, we use the estimate of Draine (1978) for the strength of the UV radiation field, and set G0 = 1.7.”
MethodInfluentialVisser, R., van Dishoeck, E. F., & Black, J. H. (2009) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/200912129/pdf · Cited by 281
Lunar dust charging by photoelectric emissions
Abbas, M. M., Tankosic, D., Craven, P. D., Spann, J. F., LeClair, A., & West, E. A. (2007) · Planetary and Space Science · doi:10.1016/j.pss.2006.12.007 · Cited by 105
Metadata
- Authors
- Draine, B. T.
- Venue
- The Astrophysical Journal Supplement Series
- Publisher
- American Astronomical Society
- Published
- 1978-04
- Volume
- 36
- Pages
- 595
- ISSN
- 0067-0049 (ISSN-L)
- 1538-4365
- OpenAlex
- W2037131602
- Cited by
- 1,342
- References
- 0
- Type
- conference abstract
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Photoelectric heating of interstellar gas. https://app.cochat.ai/papers/10.1086/190513
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- Draine, B. T. (1978). Photoelectric heating of interstellar gas. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/190513
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