@misc{10481/28414,
year = {2006},
url = {http://hdl.handle.net/10481/28414},
abstract = {We present high angular resolution ~1" and 0.6" mm-interferometric observations of the 12CO(1-0) and 12CO(2-1) line emission in the central 300pc of the late-type spiral galaxy NGC6946. The data, obtained with the IRAM Plateau de Bure Interferometer (PdBI), allow the first detection of a molecular gas spiral in the inner ~10" (270pc) with a large concentration of molecular gas (M(H_2) ~1.6x10^7M_sun) within the inner 60pc. This nuclear clump shows evidence for a ring-like geometry with a radius of ~10pc as inferred from the p-v diagrams. Both the distribution of the molecular gas as well as its kinematics can be well explained by the influence of an inner stellar bar of about 400pc length. A qualitative model of the expected gas flow shows that streaming motions along the leading sides of this bar are a plausible explanation for the high nuclear gas density. Thus, NGC6946 is a prime example of molecular gas kinematics being driven by a small-scale, secondary stellar bar.},
organization = {U. L. acknowledges support by the Spanish Ministry of Education, via the research projects AYA 2005-07516-C02-01, ESP 2004-06870-C02-02, and the Junta de Andalucía.},
publisher = {American Astronomical Society; Institute of Physics (IOP)},
keywords = {Galaxies},
keywords = {NGC 6946},
keywords = {ISM},
keywords = {Kinematics and dynamics},
keywords = {Nuclei},
title = {Molecular Gas Dynamics in NGC 6946: a Bar-driven Nuclear Starburst "Caught in the Act"},
doi = {10.1086/506265},
author = {Shinnerer, E. and Böker, Torsten and Emsellem, E. and Lisenfeld , Ute},
}