In:
The Astrophysical Journal Letters, American Astronomical Society, Vol. 906, No. 1 ( 2021-01-01), p. L4-
Abstract:
From a new perspective, we reexamine self-gravity and turbulence jointly, in hopes of understanding the physical basis for one of the most important empirical relations governing clouds in the interstellar medium (ISM), the Larson’s relation relating velocity dispersion ( σ R ) to cloud size ( R ). We report on two key new findings. First, the correct form of the Larson’s relation is , where α v is the virial parameter of clouds and σ pc is the strength of the turbulence, if the turbulence has the Kolmogorov spectrum. Second, the amplitude of Larson’s relation, σ pc , is not universal, differing by a factor of about 2 between clouds on the Galactic disk and those at the Galactic center, as evidenced by observational data.
Type of Medium:
Online Resource
ISSN:
2041-8205
,
2041-8213
DOI:
10.3847/2041-8213/abcecb
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2021
detail.hit.zdb_id:
2207648-7
detail.hit.zdb_id:
2006858-X
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