Is Messier 74 a barred spiral galaxy?

Details Is Messier 74 a barred spiral galaxy? Is Messier 74 a barred spiral galaxy?

2002-07-22

arxiv.org/abs/astro-ph/0207478v2

Astron.Astrophys. 393 (2002) 499-502

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20021060

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 M74. 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 M74.

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