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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Microlensing-induced spectral variability in Q 2237 + 0305
TL;DR: In this article, the authors present the first direct spectroscopic evidence for this effect, providing a limit on the scale of the continuum and the broad line emission regions at the center of a source quasar (2237+0305).
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Blue straggler stars in dwarf spheroidal galaxies
Michela Mapelli,E. Ripamonti,Eline Tolstoy,Steinn Sigurdsson,Mike Irwin,Giuseppina Battaglia +5 more
TL;DR: In this article, the authors analyzed a sample of BSS candidates in two nearby Galactic dSphs, Draco and Ursa Minor, and determined their radial and luminosity distributions from wide field multicolour imaging data extending beyond the tidal radii of both galaxies.
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First observation of a quasar with a redshift of 4
S. J. Warren,Paul C. Hewett,Mike Irwin,Richard G. McMahon,M. T. Bridgeland,P. S. Bunclark,E. J. Kibblewhite,E. J. Kibblewhite +7 more
TL;DR: In this paper, the authors reported the discovery of a quasar (0046- 293) with a redshift z = 4.01 and another (0044-276) with redshift Z = 3.42.
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Manganese in dwarf spheroidal galaxies
Pierre North,G. Cescutti,G. Cescutti,Pascale Jablonka,Pascale Jablonka,Vanessa Hill,Matthew Shetrone,B. Letarte,B. Lemasle,Kim A. Venn,Giuseppina Battaglia,Eline Tolstoy,Mike Irwin,Francesca Primas,P. François +14 more
TL;DR: In this article, the authors provided manganese abundances for a large number of stars in the dwarf spheroidal galaxies Sculptor and Fornax, and for a smaller number in the Carina and Sextans dSph galaxies.
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Balancing mass and momentum in the Local Group
TL;DR: In the rest frame of the Local Group (LG), the total momentum of the Milky Way (MW) and Andromeda (M31) should balance to zero as discussed by the authors, which is consistent with other properties such as the maximum rotational velocities, total stellar content, and numbers of globular clusters and dwarf satellites.