1996A&A...305..296M -
Astronomy and Astrophysics, volume 305, 296-307 (1996/1-1)
Evidence for ongoing star formation in the Carina nebula.
MEGEATH S.T., COX P., BRONFMAN L. and ROELFSEMA P.R.
Abstract (from CDS):
We present the first evidence that star formation is continuing in the molecular complex associated with the Carina nebula. CO observations in several isotopomers and transitions reveal a clumpy and dynamically complex structure in the molecular gas south of the OB association Trumpler 16. Super-resolution IRAS images of the region show a 1.1x104L☉ point source (IRAS 10430-5931) in a molecular clump at the edge of the cloud complex. The IRAS colors are characteristic of deeply embedded young stellar objects. Through a comparison with a published [SII] photograph, we find that the clump is a bright-rimmed globule. The mass of the globule is 67M☉, yielding a luminosity-to-mass ratio of ∼160L☉/M☉. J, H and K'-Band imaging of the IRAS source shows a group of highly reddened stars and bright nebulosity. We argue on a statistical basis that some of the reddened stars must be embedded in the globule and are not background objects. Additionally, several of the reddened stars exhibit anomalous near-infrared colors which are typical of embedded pre-main sequence stars. The near-infrared images show that all apparent star formation is taking place near the rim, 0.5pc from the peak in 13CO(2-1) emission. This morphology is suggestive of star formation triggered by radiation driven shocks.
Abstract Copyright:
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Journal keyword(s):
ISM: Carina nebula - interstellar medium: molecules - radio lines: ISM - star formation
Nomenclature:
Fig.2: [MCB96] N (Nos 1-4).
Simbad objects:
7
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