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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1885/40019
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| Title: | The 2dF Galaxy Redshift Survey: spectral types and luminosity functions |
| Authors: | Folkes, Simon
Ronen, Shai
Price, Ian
Lahav, Ofer
Colless, Matthew
Couch, Warrick
Deeley, Kathryn
Peterson, Bruce A. (et al) |
| Date Created: | 1999 |
| Abstract: | 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, H_0=100kms^-1Mpc^-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. |
| Type: | pjournal |
| Publication: | Royal Astronomical Society, Monthly Notices |
| URI: | http://hdl.handle.net/1885/40019 |
| Appears in Collections: | ePrints
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Files in This Item:
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Description |
Size | Format |
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| folkes_lf.pdf | | 1073Kb | Adobe PDF | View/Open |
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