I
Ian Lewis
Researcher at University of Oxford
Publications - 39
Citations - 4692
Ian Lewis is an academic researcher from University of Oxford. The author has contributed to research in topics: Galaxy & 2dF Galaxy Redshift Survey. The author has an hindex of 23, co-authored 39 publications receiving 4578 citations. Previous affiliations of Ian Lewis include ETH Zurich.
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Journal ArticleDOI
The 2dF Galaxy Redshift Survey: The environmental dependence of galaxy star formation rates near clusters
Ian Lewis,Michael L. Balogh,Roberto De Propris,Warrick J. Couch,Richard G. Bower,Alison R. Offer,Joss Bland-Hawthorn,Ivan K. Baldry,Carlton M. Baugh,Terry J. Bridges,Russell D. Cannon,Shaun Cole,Matthew Colless,Chris A. Collins,Nicholas Cross,Nicholas Cross,Gavin Dalton,Simon P. Driver,Simon P. Driver,George Efstathiou,Richard S. Ellis,Carlos S. Frenk,Karl Glazebrook,Ed Hawkins,Carole Jackson,Ofer Lahav,Stuart Lumsden,Stephen J. Maddox,Darren Madgwick,Peder Norberg,John A. Peacock,Will J. Percival,Bruce A. Peterson,William J. Sutherland,Keith Taylor +34 more
TL;DR: In this paper, the authors measured the equivalent width of the Hα emission line for 11 0006 galaxies brighter than M −−19 (Ω_Λ = 0.7, Ω_m = 0.3, H_0 = 70 km s−1) Mpc^(−1)) at 0.05 < z < 0.1 in the 2dF Galaxy Redshift Survey.
Journal ArticleDOI
Galaxy ecology: groups and low-density environments in the SDSS and 2dFGRS
Michael L. Balogh,Vince Eke,Christopher J. Miller,Ian Lewis,Richard G. Bower,Warrick J. Couch,Robert C. Nichol,Joss Bland-Hawthorn,Ivan K. Baldry,Carlton M. Baugh,Terry J. Bridges,Russell D. Cannon,Shaun Cole,Matthew Colless,Chris A. Collins,Nicholas Cross,Nicholas Cross,Gavin Dalton,Roberto De Propris,Simon P. Driver,George Efstathiou,Richard S. Ellis,Carlos S. Frenk,Karl Glazebrook,Percy Gomez,Alex Gray,Ed Hawkins,Carole Jackson,Ofer Lahav,Stuart Lumsden,Stephen J. Maddox,Darren Madgwick,Peder Norberg,John A. Peacock,Will J. Percival,Bruce A. Peterson,William J. Sutherland,Keith Taylor +37 more
TL;DR: In this article, the authors analyzed the observed correlation between galaxy environment and Halpha emission-line strength, using volume-limited samples and group catalogues of 24 968 galaxies at 0.05 < z < 0.095, drawn from the 2dF Galaxy Redshift Survey (M-bJ < -19.5) and the Sloan Digital Sky Survey(M-r < -20.6).
Journal ArticleDOI
Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue
Vince Eke,Carlton M. Baugh,Shaun Cole,Carlos S. Frenk,Peder Norberg,John A. Peacock,Ivan K. Baldry,Joss Bland-Hawthorn,Terry J. Bridges,Russell D. Cannon,Matthew Colless,Chris A. Collins,Warrick J. Couch,Gavin Dalton,Gavin Dalton,Roberto De Propris,Simon P. Driver,George Efstathiou,Richard S. Ellis,Karl Glazebrook,Carole Jackson,Ofer Lahav,Ian Lewis,Stuart Lumsden,Stephen J. Maddox,Darren Madgwick,Bruce A. Peterson,William J. Sutherland,Keith Taylor +28 more
TL;DR: The 2DFGRS percolation-inferred galaxy group (2PIGG) catalogue as discussed by the authors is a catalogue of galaxy groups from the 2-degree Field Galaxy Redshift Survey (2dFGRS).
Journal ArticleDOI
Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue
Vincent R. Eke,Carlton M. Baugh,Shaun Cole,Carlos S. Frenk,Peder Norberg,John A. Peacock,Ivan K. Baldry,Joss Bland-Hawthorn,T. Bridges,R. D. Cannon,Matthew Colless,Chris A. Collins,W. J. Couch,Gavin Dalton,R. De Propris,Simon P. Driver,George Efstathiou,Richard S. Ellis,Karl Glazebrook,Carole Jackson,O. Lahav,Ian Lewis,Stuart Lumsden,Steve Maddox,Darren Madgwick,Bruce A. Peterson,William J. Sutherland,Keith Taylor +27 more
TL;DR: The 2DFGRS percolation-inferred galaxy group (2PIGG) catalogue as mentioned in this paper is a catalogue of galaxy groups from the 2-degree Field Galaxy Redshift Survey (2dFGRS).
Journal ArticleDOI
The 2dF Galaxy Redshift Survey: spectral types and luminosity functions
S. R. Folkes,Shai Ronen,Ian Price,Ofer Lahav,Ofer Lahav,Matthew Colless,Stephen J. Maddox,Kathryn Deeley,Karl Glazebrook,Joss Bland-Hawthorn,Russell D. Cannon,Shaun Cole,Chris A. Collins,Warrick J. Couch,Simon P. Driver,Gavin Dalton,George Efstathiou,Richard S. Ellis,Carlos S. Frenk,Nick Kaiser,Ian Lewis,Stuart Lumsden,John A. Peacock,Bruce A. Peterson,William J. Sutherland,Keith Taylor +25 more
TL;DR: In this article, a Principal Component Analysis (PCA) was applied to a preliminary sample of 5869 galaxy spectra and two most significant components were used to split the sample into five spectral classes.