Nature of Field Galaxies in the (z<0.3) Universe from the CFRS Survey
| dc.creator | Tresse, L. | |
| dc.creator | Rola, C. | |
| dc.creator | Hammer, F. | |
| dc.creator | Stasinska, G. | |
| dc.date | 1994-10-21 | |
| dc.date.accessioned | 2026-07-25T19:55:20Z | |
| dc.description | We present the first detailed spectroscopic study of field galaxies up to z=0.3 from the I-magnitude limited CFRS sample. In this complete sample, we find that about half of the objects are blue emission-line galaxies. Using line ratio diagram and photoionization models, we show that in roughly half of these emission-line galaxies, ionization by hot stars cannot account for the observed line ratios. Their spectra have properties intermediate between Seyfert 2 galaxies and low-ionization nuclear emission-line regions (LINERs). Their number density (about 20%) relative to the total number of galaxies up to z=0.3, is much larger than the number density (2%) of active galactic nuclei (AGN) in the local Universe. Thus, the observed excess of blue galaxies in counts down to B=24 cannot be mainly due to starburst galaxies, as was previously thought. This result can shed a new light on the nature of the overabundant population of blue galaxies at low redshifts. | |
| dc.description | 35th Herstmonceux Conference, "Wide Field Spectroscopy and the Distant Universe", Cambridge 4-8 July 1994, 8 pages, postscript version (including figures) available here, or through anonymous ftp from gin.obspm.fr, dir: /doc/tresse/ or on request at tresse@gin.obspm.fr | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9410072 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9410072 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/68065 | |
| dc.subject | Astrophysics | |
| dc.title | Nature of Field Galaxies in the (z<0.3) Universe from the CFRS Survey | |
| dc.type | text |