High Angular Resolution Observations of the (J, K) = (1, 1), (2, 2), and (3, 3) Transitions of Ammonia in NGC 253

Details High Angular Resolution Observations of the (J, K) = (1, 1), (2, 2), and (3, 3) Transitions of Ammonia in NGC 253 High Angular Resolution Observations of the (J, K) = (1, 1), (2, 2), and (3, 3) Transitions of Ammonia in NGC 253

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasj...57..549t&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.57, No.4, pp. 549-561

Astronomy and Astrophysics

Astronomy

5

Galaxies: Individual (Ngc 253), Galaxies: Starburst, Ism: Molecules, Molecular Processes, Radio Lines: Galaxies

Scientific paper

The nearby starburst galaxy NGC 253 was mapped in the ammonia (J, K) = (1, 1), (2, 2), and (3, 3) lines in the 23GHz region with the Very Large Array. The angular resolutions were about 4'' × 3''. The distributions of the three lines were different from one another. The (1, 1) and (3, 3) lines were distributed along the bar mainly at the northeastern and southwestern regions from the center, but the (2, 2) line is distributed mainly at two clumps in the southwestern region from the center. In addition, the (1, 1) line showed absorption at the central region. The obtained rotational temperatures were < 15--28 K (lower limit), depending on the clumps. The ammonia distributions are generally consistent with estimates from our single-dish results already published. The distributions of ammonia were compared with those of continuum and several other molecular lines.

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