The Remarkable Central Structure of the Barred Galaxy NGC 1415
Abstract
A remarkable structure is observed in the innermost regions of the barred galaxy NGC 1415: a small stellar bar; bright circumnuclear ionized gas, seen in Hα two bright ionized gas sources, seen in Hα, just beyond the ends of the small bar; and a boxy distribution of optical continuum. We have developed a mass distribution model consisting of a disk, a bulge, and a bar to approximate the observed central morphology and its surface brightness. In order to reproduce the observed optical brightness distribution, a two-component bar was used, with one component to model the elongated isophotes of the bar and the second component to model the boxy-shaped isophotes. We interpret the circumnuclear ionized gas as forming a circumnuclear ring and the two bright sources as a nuclear and/or circumnuclear outflow slightly out of the plane of the disk.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2000
- DOI:
- 10.1086/308316
- arXiv:
- arXiv:astro-ph/9909406
- Bibcode:
- 2000ApJ...529..832G
- Keywords:
-
- GALAXIES: INDIVIDUAL: NGC NUMBER: NGC 1415;
- GALAXIES: ISM;
- GALAXIES: SPIRAL;
- Galaxies: Individual: NGC Number: NGC 1415;
- Galaxies: ISM;
- Galaxies: Spiral;
- Astrophysics
- E-Print:
- 19 pages, 29 figures. To be published in February 2000, ApJ, 529