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Title: A new population of extended, luminous star clusters in the halo of M31
Authors: Huxor, A. P.
Tanvir, Nial R.
Irwin, M. J.
Ibata, R.
Collett, J. L.
Ferguson, A. M. N.
Bridges, T.
Lewis, G. F.
First Published: 1-Jul-2005
Publisher: Oxford University Press (OUP), Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 2005, 360 (3), pp.1007-1012
Abstract: We present three new clusters discovered in the halo of M31 which, although having globular-like colours and luminosities, have unusually large half-light radii, ~30 pc. They lie at projected galactocentric distances of ≈15 to ≈35 kpc. These objects begin to fill the gap in parameter space between globular clusters and dwarf spheroidals, and are unlike any clusters found in the Milky Way, or elsewhere to date. Colour-magnitude diagrams, integrated photometric properties and derived King profile fit parameters are given, and we discuss possible origins of these clusters and their relationships to other populations.
DOI Link: 10.1111/j.1365-2966.2005.09086.x
ISSN: 0035-8711
Type: Article
Rights: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Copyright 2005 RAS Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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