Bibcode
Munoz-Tunon, C.; Cepa, J.; Beckman, J. E.
Bibliographical reference
(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 157, no. 1-2, July 1989, p. 157-163.
Advertised on:
7
1989
Citations
1
Refereed citations
1
Description
A two-dimensional velocity map in H-alpha of the inner 4 arc min zone of
the Scd starburst galaxy NGC 6946 has been obtained using the TAURUS
interferometric spectrometer on the 2.5 m Isaac Newton Telescope. The
major axis rotation curve is a clean kinematic superposition of a
central 1 kpc sphere with solid body rotation and a disk with density
falling inversely with radius. Clear evidence is shown of symmetrical
radial motions in the plane of the galaxy with velocity up to 100 km/s
along axes offset from the major axis by up to + or - 30 deg. Along the
bar at position angle 160 deg, outflow out to -2 kpc and significant
inflow beyond this radius are seen. These velocity fields give clues to
the nature of the starburst process within the central 1 kpc zone of the
galaxy.