Massive Star Formation Triggered by Collision between Galactic and Accreted Intergalactic Clouds

Details Massive Star Formation Triggered by Collision between Galactic and Accreted Intergalactic Clouds Massive Star Formation Triggered by Collision between Galactic and Accreted Intergalactic Clouds

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...614l.105w&link_type=abstract

The Astrophysical Journal, Volume 614, Issue 2, pp. L105-L108.

Astronomy and Astrophysics

Astronomy

4

Galaxies: Intergalactic Medium, Ism: Abundances, Ism: Clouds, Stars: Formation

Scientific paper

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.

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