Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Interstellar Filaments

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_5223-2

Definition

An interstellar filament may be defined as any elongated structure in the cold interstellar medium which has an aspect ratio larger than ∼5–10 and is significantly overdense with respect to its surroundings.

History

The presence of parsec-scale filamentary structures in nearby interstellar clouds and their potential importance for star formation have been pointed out by many authors for more than three decades. For example, Schneider and Elmegreen (1979) discussed the properties of 23 elongated dark nebulae, visible on optical plates and showing evidence of marked condensations or internal globules along their lengths, which they named “globular filaments.”

Overview

Recent studies of the nearest star-forming clouds of the galaxy at submillimeter wavelengths with the Herschel Space Observatory have provided us with unprecedented images of the initial conditions and early phases of the star formation process. The Herschelimages reveal an intricate network of filamentary...

Keywords

Star Formation Molecular Cloud Column Density Star Formation Rate Filamentary Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References and Further Reading

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Laboratoire AIM, IRFU/Service d’AstrophysiqueCEA SaclayGif-sur-YvetteFrance