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Antitruncations

Published online by Cambridge University Press:  21 March 2017

John Beckman ,
Alejandro Borlaff ,
M. Carmen Eliche-Moral ,
Joan Font  and
Peter Erwin
John Beckman
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, email: asborlaff@iac.es Facultad de Física, Universidad de La Laguna, Spain Consejo Superior de Investigaciones Científicas, Spain
Alejandro Borlaff
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, email: asborlaff@iac.es Facultad de Física, Universidad de La Laguna, Spain
M. Carmen Eliche-Moral
Affiliation:
Departamento de Astrofísica y CC. de la Atmósfera, Univ. Complutense de Madrid, Spain
Joan Font
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain, email: asborlaff@iac.es Facultad de Física, Universidad de La Laguna, Spain
Peter Erwin
Affiliation:
Max Planck Institut für Extraterrestrische Physik, Garching-bei-München, Germany
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Abstract

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Since 1970 surface brightness profiles of disc galaxies were classified as Type-I, single falling exponentials, or Type-II, broken exponentials with steeper decline in the outskirts. For the past decade Type-III profiles, (antitruncations), with a shallower fall-off in the outskirts, have been shown to occur in a significant fraction of galaxy discs. Here we give a brief overview, characterizing these profiles and their distribution with galaxy type, with a look at recent explanations of their causes, and how they fit into the picture of galaxy evolution.

Keywords

Galaxies: evolutiongalaxies: fundamental parametersgalaxies: structure

References

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