SIMBAD references

1999ApJS..120....1T - Astrophys. J., Suppl. Ser., 120, 1-39 (1999/January-0)

Dense molecular clouds in the Galactic Center region. I. Observations and data.


Abstract (from CDS):

We have observed a 160'x40' (lxb) region around the Galactic center in the CS J=1-0 line with a high spatial resolution and high sensitivity using the 45 m telescope at Nobeyama Radio Observatory. The observed area includes the Sgr A radio arc complex, Sgr B, Sgr C, and Sgr D. About 24,000 spectra of CS J=1-0 emission, which is a good tracer of high-density (n≅104 cm–3) molecular clouds, were obtained. The observed data are presented in l-b, l-v, and b-v maps. The total CS line flux in this area is{integral} S dv=1.1x106–1. Typical optical thickness of C32S J=1-0 emission is equal to or lower than τ=2-3. The total molecular mass in the Galactic center region is estimated to be M(H2)=(3-8)x107 M from the assumption of LTE. One-third of the molecular clouds in the Galactic center region are involved in several continuous curved ridges extended along the Galactic longitude. The most prominent ridge has a ``bow''-like structure with a length of 300 pc.

Abstract Copyright:

Journal keyword(s): Atlases - Galaxy: Center - ISM: Clouds - ISM: Structure

Simbad objects: 10

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