UBVR and hubble space telescope mid-ultraviolet and near-infrared surface photometry and radial color gradients of late-type, irregular, and peculiar galaxies

Violet A. Taylor, Rolf A. Jansen, Rogier Windhorst, Stephen C. Odewahn, John E. Hibbard

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

We introduce a data set of 142 mostly late-type spiral, irregular, and peculiar (interacting or merging) nearby galaxies observed in UBVR at the Vatican Advanced Technology Telescope (VATT), and we present an analysis of their radial color gradients. We confirm that nearby elliptical and early- to mid-type spiral galaxies show either no or only small color gradients, becoming slightly bluer with radius. In contrast, we find that late-type spiral, irregular, peculiar, and merging galaxies become on average redder with increasing distance from the center. The scatter in radial color gradient trends increases toward later Hubble type. As a preliminary analysis of a larger data set obtained with the Hubble Space Telescope (HST), we also analyze the color gradients of six nearby galaxies observed with NICMOS in the near-IR (H) and with WFPC2 in the mid-UV (F300W) and red (F814W). We discuss the possible implications of these results on galaxy formation and compare our nearby galaxy color gradients to those at high redshift. We present examples of images and UBVR radial surface brightness and color profiles, as well as of the tables of measurements; the full atlas and tables are published in the electronic edition only.

Original languageEnglish (US)
Pages (from-to)784-803
Number of pages20
JournalAstrophysical Journal
Volume630
Issue number2 I
DOIs
StatePublished - Sep 10 2005

Keywords

  • Galaxies: fundamental parameters
  • Galaxies: interactions
  • Galaxies: irregular
  • Galaxies: peculiar
  • Galaxies: photometry
  • Galaxies: spiral

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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