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The outer halo globular cluster system of M31 - I. the final PAndAS catalogue

Huxor, A; Mackey, Alasdair; Ferguson, A. M. N.; Irwin, Mike; Martin, Nicolas F; Tanvir, Nial R; Veljanoski, J.; McConnachie, Alan W; Fishlock, Cherie; Ibata, Rodrigo A; Lewis, G F

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We report the discovery of 59 globular clusters (GCs) and two candidate GCs in a search of the halo of M31, primarily via visual inspection of Canada-France-Hawaii Telescope/MegaCam imagery from the Pan-Andromeda Archaeological Survey (PAndAS). The superior quality of these data also allows us to check the classification of remote objects in the Revised Bologna Catalogue (RBC), plus a subset of GC candidates drawn from Sloan Digital Sky Survey (SDSS) imaging. We identify three additional new...[Show more]

dc.contributor.authorHuxor, A
dc.contributor.authorMackey, Alasdair
dc.contributor.authorFerguson, A. M. N.
dc.contributor.authorIrwin, Mike
dc.contributor.authorMartin, Nicolas F
dc.contributor.authorTanvir, Nial R
dc.contributor.authorVeljanoski, J.
dc.contributor.authorMcConnachie, Alan W
dc.contributor.authorFishlock, Cherie
dc.contributor.authorIbata, Rodrigo A
dc.contributor.authorLewis, G F
dc.date.accessioned2015-12-13T22:27:53Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/74150
dc.description.abstractWe report the discovery of 59 globular clusters (GCs) and two candidate GCs in a search of the halo of M31, primarily via visual inspection of Canada-France-Hawaii Telescope/MegaCam imagery from the Pan-Andromeda Archaeological Survey (PAndAS). The superior quality of these data also allows us to check the classification of remote objects in the Revised Bologna Catalogue (RBC), plus a subset of GC candidates drawn from Sloan Digital Sky Survey (SDSS) imaging. We identify three additional new GCs from the RBC, and confirm the GC nature of 11 SDSS objects (8 of which appear independently in our remote halo catalogue); the remaining 188 candidates across both lists are either foreground stars or background galaxies. Our new catalogue represents the first uniform census of GCs across the M31 halo - we find clusters to the limit of the PAndAS survey area at projected radii of up to Rproj ~ 150 kpc. Tests using artificial clusters reveal that detection incompleteness cuts in at luminosities below MV = -6.0; our 50 per cent completeness limit is MV ≈ -4.1. We construct a uniform set of PAndAS photometric measurements for all known GCs outside Rproj = 25 kpc, and any new GCs within this radius. With these data, we update results from Huxor et al., investigating the luminosity function (LF), colours and effective radii of M31 GCs with a particular focus on the remote halo.We find that the GCLF is clearly bimodal in the outer halo (Rproj > 30 kpc), with the secondary peak at MV ~ -5.5. We argue that the GCs in this peak have most likely been accreted along with their host dwarf galaxies. Notwithstanding, we also find, as in previous surveys, a substantial number of GCs with above-average luminosity in the outer M31 halo - a population with no clear counterpart in the Milky Way.
dc.publisherBlackwell Publishing Ltd
dc.rightsAuthor/s retain copyright
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.titleThe outer halo globular cluster system of M31 - I. the final PAndAS catalogue
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume442
dc.date.issued2014
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationU3488905xPUB3988
local.type.statusPublished Version
local.contributor.affiliationHuxor, A, Universität Heidelberg
local.contributor.affiliationMackey, Alasdair, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFerguson, A. M. N., University of Edinburgh
local.contributor.affiliationIrwin, Mike, Cambridge University
local.contributor.affiliationMartin, Nicolas F, University of Strasbourg
local.contributor.affiliationTanvir, Nial R, University of Leicester
local.contributor.affiliationVeljanoski, J., University of Edinburgh
local.contributor.affiliationMcConnachie, Alan W, NRC Herzberg Institute of Astrophysics
local.contributor.affiliationFishlock, Cherie, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationIbata, Rodrigo A, Universite de Strasbourg
local.contributor.affiliationLewis, G F, School of Physics
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage2165
local.bibliographicCitation.lastpage2187
local.identifier.doi10.1093/mnras/stu771
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2015-12-11T08:35:35Z
local.identifier.scopusID2-s2.0-84904552949
local.identifier.thomsonID000339924300019
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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