Abstract
The brightness temperature fluctuations which can be observed between the 21 cm intercloud gas emission from adjacent positions are interpreted to come from a random variation of the number of turbulence cells in the antenna beam. We find about 200 cells in our 36′ × 36′ beam. The velocity dispersion σ within one cell can be separated from the velocity dispersion τ of the centre velocities of the cells. We find τ/σ ≃ l.l. From τ/σ and from the observed velocity dispersion of the emission lines we find σ = 6.5 km · s−1. This corresponds to a kinetic temperature T k ≃ 5 000 K for the intercloud HI-gas.
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© 1974 Springer-Verlag, Berlin, Heidelberg
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Hachenberg, O., Mebold, U. (1974). On the Homogeneity and the Kinetic Temperature of the Intercloud HI-Gas. In: Mavridis, L.N. (eds) Proceedings of the First European Astronomical Meeting Athens, September 4–9, 1972. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-65666-8_14
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DOI: https://doi.org/10.1007/978-3-642-65666-8_14
Publisher Name: Springer, Berlin, Heidelberg
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