Is Messier 74 a barred spiral galaxy? Near-infrared imaging of M 74

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Abstract

We have obtained ground-based I, J and K band images of the spiral galaxy, Messier 74 (NGC 628). This galaxy has been shown to possess a circumnuclear ring of star formation from both near-infrared spectroscopy of CO absorption and sub-millimetre imaging of CO emission. Circumnuclear rings of star formation are believed to exist only as a result of a bar potential. In this paper we show evidence for a weak oval distortion in the centre of M 74. We use the results of Combes & Gerin (1985) to suggest that this weak oval potential is responsible for the circumnuclear ring of star formation observed in M 74.

Original languageEnglish (US)
Pages (from-to)499-502
Number of pages4
JournalAstronomy and Astrophysics
Volume393
Issue number2
DOIs
StatePublished - Oct 2002

Keywords

  • Galaxies: fundamental parameters
  • Galaxies: individual: M 74
  • Galaxies: spiral
  • Galaxies: structure

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