TY - JOUR
T1 - The 2dF galaxy redshift survey
T2 - Spectral types and luminosity functions
AU - Folkes, Simon
AU - Ronen, Shai
AU - Price, Ian
AU - Lahav, Ofer
AU - Colless, Matthew
AU - Maddox, Steve
AU - Deeley, Kathryn
AU - Glazebrook, Karl
AU - Bland-Hawthorn, Joss
AU - Cannon, Russell
AU - Cole, Shaun
AU - Collins, Chris
AU - Couch, Warrick
AU - Driver, Simon P.
AU - Dalton, Gavin
AU - Efstathiou, George
AU - Ellis, Richard S.
AU - Frenk, Carlos S.
AU - Kaiser, Nick
AU - Lewis, Ian
AU - Lumsden, Stuart
AU - Peacock, John
AU - Peterson, Bruce A.
AU - Sutherland, Will
AU - Taylor, Keith
PY - 1999/9/11
Y1 - 1999/9/11
N2 - We describe the 2dF Galaxy Redshift Survey (2dFGRS) and the current status of the observations. In this exploratory paper, we apply a principal component analysis to a preliminary sample of 5869 galaxy spectra and use the two most significant components to split the sample into five spectral classes. These classes are defined by considering visual classifications of a subset of the 2dF spectra, and also by comparison with high-quality spectra of local galaxies. We calculate a luminosity function for each of the different classes and find that later-type galaxies have a fainter characteristic magnitude, and a steeper faint-end slope. For the whole sample we find M* = -19.7 (for Ω = 1, H0 = 100 km s-1 Mpc-1), α = -1.3, φ* = 0.017. For class 1 ('early-type') we find M* = -19.6, α = -0.7, while for class 5 ('late-type') we find M* = -19.0, α = -1.7. The derived 2dF luminosity functions agree well with other recent luminosity function estimates.
AB - We describe the 2dF Galaxy Redshift Survey (2dFGRS) and the current status of the observations. In this exploratory paper, we apply a principal component analysis to a preliminary sample of 5869 galaxy spectra and use the two most significant components to split the sample into five spectral classes. These classes are defined by considering visual classifications of a subset of the 2dF spectra, and also by comparison with high-quality spectra of local galaxies. We calculate a luminosity function for each of the different classes and find that later-type galaxies have a fainter characteristic magnitude, and a steeper faint-end slope. For the whole sample we find M* = -19.7 (for Ω = 1, H0 = 100 km s-1 Mpc-1), α = -1.3, φ* = 0.017. For class 1 ('early-type') we find M* = -19.6, α = -0.7, while for class 5 ('late-type') we find M* = -19.0, α = -1.7. The derived 2dF luminosity functions agree well with other recent luminosity function estimates.
KW - Galaxies: distances and redshifts
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: stellar content
UR - https://www.scopus.com/pages/publications/0042122998
U2 - 10.1046/j.1365-8711.1999.02721.x
DO - 10.1046/j.1365-8711.1999.02721.x
M3 - Article
SN - 0035-8711
VL - 308
SP - 459
EP - 472
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -