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 Halpha, two bright ionized gas sources, seen in Halpha, just beyond the ends of the small bar and a boxy distribution of optical continuum. We have developed a mass distribution model consisting in disk, a bulge, and a bar to approximate t he 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.

19 pages, 29 figures. To be published in February 2000, ApJ, 529

References in corpus (2)

• Strict Limits on the Ionizing Luminosity in NGC 1068 from Jet-axis Molecular Clouds
• Central Activity in the Barred Galaxy NGC 3367

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• Double-Barred Galaxies: I. A Catalog of Barred Galaxies with Stellar Secondary Bars and Inner Disks
• Peanuts at an Angle: Detecting and Measuring the Three-Dimensional Structure of Bars in Moderately Inclined Galaxies
• Orbital dynamics of three-dimensional bars: IV. Boxy isophotes in face-on views
• Halpha Nuclear Geyser (Bipolar Outflow) from the Barred Galaxy NGC 1415 (ESO 482-G033)
• HI 21 cm Extended Structures to the North-East, and South-West of NGC 5595: VLA Observations of the Disk Galaxy Pair NGC 5595 and NGC 5597