A Hyperenergetic CO Shell in the Galactic Center Molecular Cloud Complex

Details A Hyperenergetic CO Shell in the Galactic Center Molecular Cloud Complex A Hyperenergetic CO Shell in the Galactic Center Molecular Cloud Complex

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53..787o&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.53, No. 5, pp.787-791

Astronomy and Astrophysics

Astronomy

8

Galaxies: Nuclei, Galaxy: Center, Ism: Clouds, Ism: Molecules

Scientific paper

We report on the detection of a high-velocity feature, CO 1.27+0.01, in the Galactic-center molecular-cloud complex. In our 12 images taken with the NRO 45m telescope, CO 1.270.01 appears as the second prominent high-velocity feature, next to CO 0.02-0.02, having a velocity width of ΔV ~= 100km s-1 and a size of 9pc × 12pc. It seems to consist of two expanding shells with sizes of ~10pc. The major shell has a kinetic energy of about an order of magnitude larger than the gravitational energy, indicating that the shell is apparently gravitationally unbound. We propose that CO 1.27+0.01 may have been accelerated by a series of supernova explosions which occurred within the last ~6×104yr. No association of a nonthermal radio continuum source suggests a strong magnetic field (B >~ 0.4mG) in the vicinity of CO 1.27+0.01.

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