Journal Article

Neutral hydrogen gas distribution and kinematics in NGC 7479

S. Laine and S. T. Gottesman

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 297, issue 4, pages 1041-1051
Published in print July 1998 | ISSN: 0035-8711
Published online July 1998 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1046/j.1365-8711.1998.01513.x
Neutral hydrogen gas distribution and kinematics in NGC 7479

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We have investigated the effects of a bar and an asymmetric spiral structure on the neutral hydrogen distribution and kinematics in the strongly barred spiral galaxy NGC 7479. The strongest 21-cm line emission at 1-kpc resolution comes from the western spiral arm which appears to be slightly inclined to the plane of the main disc. In contrast, the area within the radius of the bar is devoid of 21-cm line emission. The radio continuum emission at 21 cm follows the bar dust lanes, but beyond 3 kpc from the nucleus the radio continuum emission has a peculiar morphology, unlike that of optical and near-infrared images. We did not detect any low surface brightness gas-rich companions in the near neighbourhood of NGC 7479. This leads us to propose that the strong western spiral arm was created in a recent minor merger.

Keywords: galaxies: individual: NGC 7479; galaxies: interactions; galaxies: ISM; galaxies: kinematics and dynamics; galaxies: structure; radio continuum: galaxies

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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