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.
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Hot Degenerates in the MCT Survey. III. A Sample of White Dwarf Stars in the Southern Hemisphere
Pierre Bergeron,F. Wesemael,G. Fontaine,Robert Lamontagne,Serge Demers,A. Bédard,M.-J. Gingras,Simon Blouin,Mike Irwin,Souza Oliveira Kepler +9 more
TL;DR: In this article, the optical spectra of 144 white dwarfs detected in the Montreal-Cambridge-Tololo (MCT) colorimetric survey were presented, including 120 DA, 12 DB, 4 DO, 1 DQ, and 7 DC stars.
Journal ArticleDOI
Virtual Observatory Access to the The IPHAS Data Releases
TL;DR: The IPHAS Early Data Release (EDR) as discussed by the authors is a photometric catalogue of more than 200 million unique objects, coupled with associated image data covering more than 1000 square degrees in three colours.
Peer Review
The Hubble Space Telescope Survey of M31 Satellite Galaxies II. The Star Formation Histories of Ultra-Faint Dwarf Galaxies
A. Savino,Daniel R. Weisz,Evan D. Skillman,Andrew E. Dolphin,Andrew A. Cole,Nitya Kallivayalil,Andrew Wetzel,Jay Anderson,Gurtina Besla,Michael Boylan-Kolchin,Thomas M. Brown,James S. Bullock,Michelle L. M. Collins,Michael C. Cooper,Alis J. Deason,Aaron Dotter,Mark A. Fardal,Annette M. N. Ferguson,Tobias K. Fritz,Marla Geha,Karoline M. Gilbert,Puragra Guhathakurta,Rodrigo A. Ibata,Mike Irwin,Myoungwon Jeon,Evan N. Kirby,Geraint F. Lewis,Dougal Mackey,Steven R. Majewski,Nicolas F. Martin,Alan W. McConnachie,Ekta Patel,R. Michael Rich,Joshua D. Simon,Sangmo Tony Sohn,Erik Tollerud,Roeland P. van der Marel +36 more
TL;DR: In this paper , the lifetime star formation histories (SFHs) for six ultra-faint dwarf (UFD) satellite galaxies of M31 were obtained from the oldest main sequence turn-off of UFDs outside the halo of the Milky Way (MW).
Posted Content
Metal Abundances in the Lyman Alpha Forest
Sara L. Ellison,Geraint F. Lewis,Max Pettini,Wallace L. W. Sargent,Frederic H. Chaffe,Mike Irwin +5 more
TL;DR: In this paper, the abundance of Carbon in Ly alpha forest clouds was investigated using high S/N echelle spectra of the recently discovered ultraluminous QSO APM 08279+5255 and the results showed that approximately half of the Ly alpha clouds whose hydrogen column densities log N(HI) > 14.5 have associated weak CIV absorption with log N (CIV) > 12, and a median N(CIV)/N(H I) = 1.4 x 10^-3.
Metal abundances in the Lyman-alpha forest
Sara L. Ellison,Geraint F. Lewis,Max Pettini,Wallace L. W. Sargent,Frederic H. Chaffe,Mike Irwin +5 more
TL;DR: In this article, the abundance of Carbon in Ly alpha forest clouds was investigated using high S/N echelle spectra of the recently discovered ultraluminous QSO APM 08279+5255 and the results showed that approximately half of the Ly alpha clouds whose hydrogen column densities log N(HI) > 14.5 have associated weak CIV absorption with log N (CIV) > 12, and a median N(CIV)/N(H I) = 1.4 x 10^-3.