Newly discovered globular clusters in NGC 147 and NGC 185 from PAndAS

Download
  1. Get@NRC: Newly discovered globular clusters in NGC 147 and NGC 185 from PAndAS (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1093/mnras/stt1557
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume435
Issue4
Pages36543666; # of pages: 13
Subjectgalaxies: globular clusters: general; galaxies: individual: NGC 147; galaxies: individual: NGC 185
AbstractUsing data from the Pan-Andromeda Archaeological Survey (PAndAS), we have discovered four new globular clusters (GCs) associated with the M31 dwarf elliptical (dE) satellites NGC 147 and NGC 185. Three of these are associated with NGC 147 and one with NGC 185. All lie beyond the main optical boundaries of the galaxies and are the most remote clusters yet known in these systems. Radial velocities derived from low-resolution spectra are used to argue that the GCs are bound to the dwarfs and are not part of the M31 halo population. Combining PAndAS with United Kingdom Infrared Telescope (UKIRT)/WFCAM (Wide- Field Camera) data, we present the first homogeneous optical and near-IR photometry for the entireGCsystems of these dEs. Colour-colour plots and published colour-metallicity relations are employed to constrain GC ages and metallicities. It is demonstrated that the clusters are in general metal poor ([Fe/H] < -1.25 dex), while the ages are more difficult to constrain. The mean (V - η0 colours of the two GC systems are very similar to those of the GC systems of dEs in the Virgo and Fornax clusters, as well as the extended halo GC population in M31. The new clusters bring the GC-specific frequency (SN) to ~9 in NGC 147 and ~5 in NGC 185, consistent with values found for dEs of similar luminosity residing in a range of environments.
Publication date
PublisherOxford University Press
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21271827
Export citationExport as RIS
Report a correctionReport a correction
Record identifierf130027b-445f-44ca-85e3-1bd5d13b34c5
Record created2014-04-23
Record modified2016-11-02
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)