The spectral characteristics of the 2dFGRS-NVSS galaxies

Details The spectral characteristics of the 2dFGRS-NVSS galaxies The spectral characteristics of the 2dFGRS-NVSS galaxies

2001-01-23

arxiv.org/abs/astro-ph/0101399v1

Astronomy and Astrophysics

Astrophysics

11 pages, 5 figures, accepted for publication in PASA

Scientific paper

We have analysed the 2dF spectra of a sample of galaxies common to the 2dF galaxy redshift survey (2dFGRS, Colless 1999) and the NRAO VLA sky survey (NVSS, Condon et al. 1998). Our sample comprises 88 galaxies selected by Sadler et al. (1999) from 30 2dFGRS fields observed in 1998. In this paper we discuss how this and future, much larger, samples of 2dFGRS-NVSS galaxies can be interpreted via analysis of those galaxies with strong narrow emission lines. Using diagnostic line ratio measurements we confirm the majority of the eyeball classifications of Sadler et al. (1999), although many galaxies show evidence of being `composite' galaxies - a mixture of AGN plus starburst components.

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