The Dynamics of Molecular Material Within 15 pcs of the Galactic Center

Details The Dynamics of Molecular Material Within 15 pcs of the Galactic Center The Dynamics of Molecular Material Within 15 pcs of the Galactic Center

1999-10-04

arxiv.org/abs/astro-ph/9910043v1

Astrophys.J. 533 (2000) 245

Astronomy and Astrophysics

Astrophysics

11 pages, 13 figures, to appear in The Astrophysical Journal

Scientific paper

10.1086/308650

We report the results of a 5-field mosaic of the central 15pc of the Galaxy in the (1,1) and (2,2) lines of NH3. Two narrow filaments or streamers are seen running parallel to the Galactic plane. The southern streamer appears to carry gas directly toward the nuclear region from the 20 km/s cloud. The eastern streamer, which we will denote the molecular ridge, appears to be the denser part of the 50 km/s cloud which lies immediately east of the Sgr A East complex and extends in the south towards the 20 km/s cloud. This ridge of gas carries the kinematical signatures of interactions with Sgr A East as well as a SNR which lies south of the Galactic center. The bulk motion of the gas, the enhanced line widths, and the heating of the molecular material all suggest an active evolutionary phase for the gas immediately adjacent to the nucleus.

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