Imaging of the shell galaxies NGC 474 and 7600, and implications for their formation

We present photometric observations of two shell galaxies, NGC 474 and 7600. We examine the photometric colours and surface brightnesses of the shells and their host galaxies, and the isophotal parameters of each galaxy. In the case of NGC 474, we find that the shell formation is consistent with a m...

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Bibliographic Details
Published in:	Monthly notices of the Royal Astronomical Society Vol. 307; no. 4; pp. 967 - 976
Main Authors:	Turnbull, A. J., Bridges, T. J., Carter, D.
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Science Ltd 21-08-1999
Subjects:	galaxies: evolution galaxies: individual: NGC 474 galaxies: individual: NGC 7600 galaxies: interactions galaxies: photometry
Online Access:	Get full text
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Summary:	We present photometric observations of two shell galaxies, NGC 474 and 7600. We examine the photometric colours and surface brightnesses of the shells and their host galaxies, and the isophotal parameters of each galaxy. In the case of NGC 474, we find that the shell formation is consistent with a merger origin, although it is possible that the close companion NGC 470 is contributing to the shell system via mass transfer. NGC 7600 exhibits shell geometry and colours which also favour a merger origin.
Bibliography:	Present address: Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia. istex:881D760BCF88C15EA5636D0A6421DE68DC17D648 ark:/67375/HXZ-VJT1NC10-0 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0035-8711 1365-2966
DOI:	10.1046/j.1365-8711.1999.02724.x