Properties of interstellar filaments as derived from Herschel observations

Arzoumanian, Doris, Andre, Philippe, Peretto, Nicolas ORCID: https://orcid.org/0000-0002-6893-602X and Koenyves, Vera 2014. Properties of interstellar filaments as derived from Herschel observations. Stamatellos, D, Goodwin, S and Ward-Thompson, D, eds. The Labyrinth of Star Formation, Vol. 36. Astrophysics and Space Science Proceedings, Springer, pp. 259-263. (10.1007/978-3-319-03041-8_49)

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Abstract

We present a scenario for filament formation and evolution motivated by recent observational results of nearby molecular clouds. The analysis of more than 250 filaments observed in 7 regions by the Herschel Gould Belt Survey show that the filaments are characterized by a narrow distribution of central width sharply peaked at ∼ 0.1 pc. This typical filament width corresponds, within a factor of ∼ 2 to the sonic scale below which interstellar turbulence becomes subsonic in diffuse gas, which may suggest that the filaments form as a result of the dissipation of large-scale turbulence. The analysis of IRAM 30 m molecular line observations of a sample of these filaments show evidence of an increase in non-thermal velocity dispersion with column density which suggest an evolution of the supercritical filaments in mass per unit length while accreting surrounding material.

Item Type:	Book Section
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Publisher:	Springer
ISBN:	978-3-319-03040-1
Last Modified:	27 Oct 2022 08:24
URI:	https://orca.cardiff.ac.uk/id/eprint/62210

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