The 2dF Galaxy Redshift Survey: Spectral Types and Luminosity Functions

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dc.creatorFolkes, S. R.
dc.creatorRonen, S.
dc.creatorPrice, I.
dc.creatorLahav, O.
dc.creatorColless, M.
dc.creatorMaddox, S. J.
dc.creatorDeeley, K. E.
dc.creatorGlazebrook, K.
dc.creatorBland-Hawthorn, J.
dc.creatorCannon, R. D.
dc.creatorCole, S.
dc.creatorCollins, C. A.
dc.creatorCouch, W. J.
dc.creatorDriver, S. P.
dc.creatorDalton, G.
dc.creatorEfstathiou, G.
dc.creatorEllis, R. S.
dc.creatorFrenk, C. S.
dc.creatorKaiser, N.
dc.creatorLewis, I. J.
dc.creatorLumsden, S. L.
dc.creatorPeacock, J. A.
dc.creatorPeterson, B. A.
dc.creatorSutherland, W.
dc.creatorTaylor, K.
dc.date1999-03-30
dc.date.accessioned2026-07-07T11:08:27Z
dc.date.available2026-07-07T11:08:27Z
dc.descriptionWe 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 comparing to 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 Omega=1, H_0=100 km/sec/Mpc), alpha=-1.3, phi*=0.017. For class 1 (`early-type') we find M*=-19.6, alpha=-0.7, while for class 5 (`late-type') we find M*=-19.0, alpha=-1.7. The derived 2dF luminosity functions agree well with other recent luminosity function estimates.
dc.description15 pages, 14 ps and eps figures, Latex, MNRAS, accepted
dc.identifierhttps://arxiv.org/abs/astro-ph/9903456
dc.identifierhttp://arxiv.org/abs/astro-ph/9903456
dc.identifierMon.Not.Roy.Astron.Soc.308:459-472,1999
dc.identifierdoi:10.1046/j.1365-8711.1999.02721.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190141
dc.subjectAstrophysics
dc.titleThe 2dF Galaxy Redshift Survey: Spectral Types and Luminosity Functions
dc.typetext

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