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arXiv:astro-ph/0402524 (astro-ph)
[Submitted on 23 Feb 2004 (v1), last revised 27 Feb 2004 (this version, v2)]

Title:The origin and structure of clumps along molecular outflows: the test case of CB3

Authors:Serena Viti, Claudio Codella, Milena Benedettini, Rafael Bachiller
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Abstract: We investigate the origin of the small, chemically rich molecular clumps observed along the main axis of chemically rich outflows such as CB3 and L1157. We develop a chemical model where we explore the chemical evolution of these clumps, assuming they are partially pre-existing to the outflow, or alternatively newly formed by the impact of the outflow on the surrounding medium. The effects of the impact of the outflow are reproduced by density and temperature changes in the clump. We find that the observed abundances of CH3OH, SO and SO2 are best reproduced by assuming a scenario where the dense molecular gas observed is probably pre-existing in the interstellar medium before the formation of their exciting (proto)stars and that the clumpiness and the rich chemistry of the clumps are a consequence of a pre-existing density enhancement and of its interaction with the outflow.
Comments: 11 pages, 5 figures, accepted by MNRAS; corrected label in figure 5
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0402524
  (or arXiv:astro-ph/0402524v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0402524
Journal reference: Mon.Not.Roy.Astron.Soc. 350 (2004) 1029
Related DOI: https://doi.org/10.1111/j.1365-2966.2004.07722.x

Submission history

From: Serena Viti [view email]
[v1] Mon, 23 Feb 2004 09:45:26 UTC (133 KB)
[v2] Fri, 27 Feb 2004 12:35:41 UTC (133 KB)
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