M
Mike Irwin
Researcher at University of Cambridge
Publications - 768
Citations - 89530
Mike Irwin is an academic researcher from University of Cambridge. The author has contributed to research in topics: Galaxy & Milky Way. The author has an hindex of 136, co-authored 755 publications receiving 83262 citations. Previous affiliations of Mike Irwin include University of New South Wales & Lawrence Berkeley National Laboratory.
Papers
More filters
Journal ArticleDOI
The outer halo globular cluster system of M31 – II. Kinematics
J. Veljanoski,Alasdair Mackey,Annette M. N. Ferguson,Avon Huxor,P. Cote,Mike Irwin,Nial R. Tanvir,Jorge Peñarrubia,Edouard J. Bernard,Mark A. Fardal,Nicolas F. Martin,Alan W. McConnachie,Geraint F. Lewis,Scott Chapman,Rodrigo A. Ibata,Arif Babul +15 more
TL;DR: In this paper, a detailed kinematic analysis of the outer halo globular cluster system of the Andromeda galaxy (M31) is presented, based on a set of new spectroscopic observations for 78 clusters lying at projected distances between Rproj � 20-140 kpc from the M31 center.
Journal ArticleDOI
The outer halo globular cluster system of M31 - I. The final PAndAS catalogue
Avon Huxor,Alasdair Mackey,Annette M. N. Ferguson,Mike Irwin,Nicolas F. Martin,Nial R. Tanvir,J. Veljanoski,Alan W. McConnachie,Cherie K Fishlock,Rodrigo A. Ibata,Geraint F. Lewis +10 more
TL;DR: In this paper, the authors 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 CHFT/MegaCam imagery from the Pan-Andromeda Archaeological Survey (PAndAS).
Journal ArticleDOI
ACS Photometry of Extended, Luminous Globular Clusters in the Outskirts of M31*
Alasdair Mackey,Avon Huxor,Annette M. N. Ferguson,Nial R. Tanvir,Mike Irwin,Rodrigo A. Ibata,Terry J. Bridges,R. A. Johnson,Geraint F. Lewis +8 more
TL;DR: The results confirm that these four objects are bona fide old, metal-poor globular clusters, albeit with combined structures and luminosities unlike those observed for any other globular cluster in the Local Group or beyond.
Journal ArticleDOI
The distant type Ia supernova rate
Reynald Pain,Sebastien Fabbro,Mark Sullivan,Richard S. Ellis,Richard S. Ellis,Greg Aldering,Pierre Astier,Susana E. Deustua,A. S. Fruchter,Gerson Goldhaber,Gerson Goldhaber,Ariel Goobar,Donald E. Groom,D. Hardin,I. M. Hook,Dale Andrew Howell,Mike Irwin,A. G. Kim,M. Y. Kim,R. A. Knop,Julia C. Lee,Julia C. Lee,Christopher Lidman,Richard G. McMahon,Peter Nugent,Nino Panagia,C. R. Pennypacker,C. R. Pennypacker,Saul Perlmutter,Saul Perlmutter,Pilar Ruiz-Lapuente,K. Schahmaneche,Bradley E. Schaefer,Bradley E. Schaefer,Nicholas A. Walton +34 more
TL;DR: In this article, a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project is presented. But the authors do not consider the impact of the assumed cosmological parameters on the observed supernova rate.
Journal ArticleDOI
The Stellar Populations of the M31 Halo Substructure
Annette M. N. Ferguson,R. A. Johnson,R. A. Johnson,D. C. Faria,D. C. Faria,Mike Irwin,Rodrigo A. Ibata,Kathryn V. Johnston,Geraint F. Lewis,Nial R. Tanvir +9 more
TL;DR: In this paper, the authors presented the first results from a survey of stellar substructure in the outskirts of M31 using the Advanced Camera for Surveys on board the Hubble Space Telescope, revealing clear variations in morphology between most fields, indicating that the age and/or metallicity mix of stars is not constant at large radius.