Massive star formation triggered by collision between Galactic and accreted intergalactic clouds

Jun Jie Wang, Wen Ping Chen, Martin Miller, Sheng L.I. Qin, Yue Fang Wu

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11 Scopus citations

Abstract

We present mapping observations of molecular lines 12CO (2-1), 12CO (3-2), 13CO (2-1), and 13CO (3-2) toward the massive star-forming region IRAS 04000+5052 that suggest kinematics consistent with cloud-cloud collision and a possible unusual abundance ratio of carbon isotopes. Together with the previous spectroscopic study that shows an extreme deficiency in heavy elements in the surrounding nebulosity - suggestive of primordial nature - we propose that the cloud material is of intergalactic origin and that the young star cluster in IRAS 04000+5052 is the consequence of triggered star formation due to the collision of a Galactic cloud with accreted intergalactic material.

Original languageEnglish
Pages (from-to)L105-L108
JournalAstrophysical Journal
Volume614
Issue number2 II
DOIs
StatePublished - 20 Oct 2004

Keywords

  • Intergalactic medium
  • ISM: abundances
  • ISM: clouds
  • Online material: color figures
  • Stars: formation

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