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The Outer Disks of Early-type Galaxies. II. Surface-brightness Profiles of Unbarred Galaxies and Trends with Hubble Type

  • Authors: Leonel Gutiérrez, Peter Erwin, Rebeca Aladro, and John E. Beckman

Gutiérrez et al. 2011 The Astronomical Journal 142 145.

  • Provider: AAS Journals

Caption: Figure 1.

Evidence for a bar in the Sa galaxy IC 499. Upper left panel: R-band isophotes, logarithmically spaced. Upper right panel: ellipse fits to the same image (position angle of outer disk is indicated by the horizontal dashed line); the bar shows up primarily as a sharp twist in the position angles. Lower left panel: unsharp mask of the R-band isophotes (same scale as upper left panel).

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