The 2dF Galaxy Redshift Survey: spectral types and luminosity functions
The 2dF Galaxy Redshift Survey: spectral types and luminosity functions
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 …