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Malin 1: A Deeper Look

Published online by Cambridge University Press:  05 March 2013

Lesa Moore  and
Quentin A. Parker
Lesa Moore*
Affiliation:
Department of Physics, Macquarie University, Sydney NSW 2109, Australia
Quentin A. Parker
Affiliation:
Department of Physics, Macquarie University, Sydney NSW 2109, Australia Anglo-Australian Observatory, PO Box 296, Epping NSW 2121, Australia
*
CCorresponding author. E-mail: [email protected]
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Abstract

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Our R-band data show that the optical light from Malin 1 corresponds well with the >2-arcmin extent of the galaxy's Hı content and continues well beyond previously published V-band optical light radial profiles. Analysis of our image yields improved understanding of the galaxy's properties. We measure ellipticity of 0.20 ± 0.03, implying inclination of 38 ± 3°, and we trace the radial profile to 77arcsec. A single dusty spiral arm is also weakly discernable, and is consistent with the rotation direction of the Hı and spiral structure of the inner disk. Possible scenarios for the origin of the spiral structure are discussed.

Keywords

galaxies: evolutiongalaxies: fundamental parametersgalaxies: individual (Malin 1)techniques: image processing
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 23 , Issue 4 , 2006 , pp. 165 - 169
Copyright
Copyright © Astronomical Society of Australia 2006

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