Compression Disturbances in the Atomic Zone of Photodissociation Regions of Interstellar Gas

The parameters of autowave compression pulses formed in isentropically unstable atomic regions of the Orion Bar are estimated. The dependences of the density, pressure, and velocity amplitudes on the equilibrium temperature are determined. The obtained values are compared with observed nonthermal tu...

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Bibliographic Details
Published inBulletin of the Lebedev Physics Institute Vol. 49; no. 10; pp. 307 - 311
Main Authors Riashchikov, D. S., Pomelnikov, I. A., Molevich, N. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.10.2022
Springer Nature B.V
Subjects
Compression zone
Disturbances
Interstellar gas
Photodissociation
Physics
Physics and Astronomy
waves
photodissociation regions
isentropic instability
interstellar medium
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Summary:The parameters of autowave compression pulses formed in isentropically unstable atomic regions of the Orion Bar are estimated. The dependences of the density, pressure, and velocity amplitudes on the equilibrium temperature are determined. The obtained values are compared with observed nonthermal turbulent velocity pulsations and pressure disturbances.
ISSN:1068-3356
1934-838X
DOI:10.3103/S1068335622100098