2002/12/04 by Peter Erwin, Linda S. Sparke · 3 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Bar (unit) #Barred spiral galaxy #Computer science #Ellipse #Elliptical galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hubble space telescope #Lenticular galaxy #Measure (data warehouse) #Physics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/367885
published as Astrophys.J.Suppl.146:299,2003 · LaTeX, 66 pages (including 42 figures, 36 in color). To appear in The Astrophysical Journal Supplement. Full-resolution and text-only versions available at http://www.iac.es/galeria/erwin/research/
arxiv created 2002/12/04 · openalex publication_date 2003/06/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
This paper presents the results of a high-resolution imaging survey, using both ground-based and Hubble Space Telescope images, of a complete sample of nearby barred S0-Sa galaxies in the field, with a particular emphasis on identifying and measuring central structures within the bars: secondary bars, inner disks, nuclear rings and spirals, and off-plane dust. A discussion of the frequency and statistical properties of the various types of inner structures has already been published. Here we present the data for the individual galaxies and measurements of their bars and inner structures. We set out the methods we use to find and measure these structures, and how we discriminate between them. In particular, we discuss some of the deficiencies of ellipse fitting of the isophotes, which by itself cannot always distinguish between bars, rings, spirals, and dust, and which can produce erroneous measurements of bar sizes and orientations.