Radially truncated galactic discs

Richard de Grijs*, Michiel Kregel, Karen H. Wesson

*Corresponding author for this work

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

We present the first results of a systematic analysis of radially truncated exponential discs for four galaxies of a complete sample of disc-dominated edge-on spiral galaxies. The discs of our sample galaxies are truncated at similar radii on either side of their centres. With the possible exception of the disc of ESO 416-G25, it appears that the truncations in our sample galaxies are closely symmetric, in terms of both their sharpness and the truncation length. However, the truncations occur over a larger region and not as abruptly as found in previous studies. We show that the truncated luminosity distributions of our sample galaxies, if also present in the mass distributions, comfortably meet the requirements for longevity. The formation and maintenance of disc truncations are probably closely related to stability requirements for galactic discs.

Original languageEnglish
Pages (from-to)1074-1086
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume324
Issue number4
DOIs
Publication statusPublished - 1 Jul 2001
Externally publishedYes

    Fingerprint

Keywords

  • galaxies: formation
  • galaxies: fundamental parameters
  • galaxies: photometry
  • galaxies: spiral
  • galaxies: structure

Cite this