Molecular Clouds and Massive Star Formation in the Norma Spiral Arm

Details Molecular Clouds and Massive Star Formation in the Norma Spiral Arm Molecular Clouds and Massive Star Formation in the Norma Spiral Arm

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26q.180g&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

Scientific paper

The Norma spiral arm in the Southern Galaxy contains the most massive molecular clouds as well as the most FIR luminous regions of massive star formation in the Galactic disk. The tangent region of this arm, at a well defined distance of ≈ 4.5 kpc from the Sun, is ideal to study in detail the process of massive star formation in GMCs (Bronfman et al. 1988, ApJ, 324, 248). We present maps of the major GMCs in ^{12}CO and C^{18}O obtained with the Nanten 4-m telescope, at a resolution of 2.5 arcmin. We have obtained also CS (2-1) and CS(5-4) maps of several OB star formation regions embedded in these GMCs (Bronfman et al. 1996, A&AS, 115, 81). What is the contribution from embedded OB stars to the total FIR emission from these GMCs? What is the fraction of cloud molecular gas involved in massive star formation?

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