CO(4-3) and CO(3-2) studies of M 51 and NGC 6946

Details CO(4-3) and CO(3-2) studies of M 51 and NGC 6946 CO(4-3) and CO(3-2) studies of M 51 and NGC 6946

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...347l...5n&link_type=abstract

Astronomy and Astrophysics, v.347, p.L5-L8 (1999)

Astronomy and Astrophysics

Astrophysics

18

Galaxies: Individual: M 51, Galaxies: Individual: Ngc 6946, Galaxies: Ism, Galaxies: Spiral, Radio Lines: Galaxies

Scientific paper

We have mapped several nearby galaxies in the CO(4-3) line transition with the Heinrich-Hertz-Telescope on Mt. Graham, Arizona, during an excellent weather period in December 1998. Here we report on our observations of M 51 and NGC 6946. The results suggest a concentration of highly excited CO gas to the nuclei of these galaxies. Moreover, in both objects CO(4-3) line emission was also detected for the first time in the spiral arms, several kiloparsecs away from the centre.

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