ar X iv : a st ro - p h / 02 04 13 3 v 1 8 A pr 2 00 2 Towards the Secondary Bar : Gas Morphology and Dynamics in NGC 4303
نویسندگان
چکیده
We report on the molecular gas properties in the central kiloparsec of the almost face-on double barred galaxy NGC 4303 (M 61), using the CO 1−0 line emission observed with the Owens Valley Radio Observatory (OVRO) millimeter interferometer. The bulk of the molecular line emission comes from two straight gas lanes which run north-south along the leading sides of the large-scale primary bar. Velocity deviations of up to 90 km s from the mean rotational velocity are associated with these gas lanes. Inside a radius of ∼ 5 (∼ 400 pc) the molecular
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