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Triggered massive star formation in the open cluster NGC 1893

  • Amparo Marco (a1) and Ignacio Negueruela (a1)

Abstract

We have carried out a search for emission line pre-main sequence (PMS) stars in the area of the star-forming young open cluster NGC 1893 by means of slitless spectroscopy. We find 19 emission line stars with spectral types spanning the range from early B-type to G-type. All the PMS stars are confined to two small regions: the outer rim of the molecular cloud associated with the H ii region IC 410 and the vicinity of the bright emission cometary nebulae Sim 129 and Sim 130. The overall spatial distribution of PMS stars strongly suggests, that present day star formation in NGC 1893 is triggered by the O-type stars in the cluster.

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References

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Marco, A., Bernabeu, G., Negueruela, I. 2001, AJ 121, 2075.
Marco, A., Negueruela, I. 2002, A&A 393, 195.

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