BLR velocities in optically and X-ray selected AGN samples
| dc.creator | Engels, Dieter | |
| dc.creator | Keil, Ralf | |
| dc.date | 2000-05-08 | |
| dc.date.accessioned | 2026-07-07T01:53:25Z | |
| dc.date.available | 2026-07-07T01:53:25Z | |
| dc.description | We have analyzed optical spectra of 473 X-ray and 235 optically selected AGNs, to study their emission line properties. We present results of an analysis of the H-beta linewidths. We find that the linewidth distribution of quasars is shifted towards higher velocities (<v>=4300 km s-1) compared to the distribution of Sy 1s (<v>=3000 km s-1). There are no Narrow Line Quasars, i.e. there are no AGNs with quasar luminosities and FWHM(H-beta) < 2000 km s-1. NLSy1s comprise 20-30 per cent of the AGN population at faint absolute magnitudes (MB>-22), irrespective of the selection method. In the RASS sample we find Gamma [0.1-2.4 keV] < 3.3. The Gamma vs. FWHM(H-beta) distribution for Sy 1 galaxies is consistent with previous work. For QSOs the spectral index also flattens with increasing FWHM(H-beta), but they have larger linewidths than Seyfert 1s. | |
| dc.description | Poster contribution presented at the Joint MPE,AIP,ESO workshop on NLS1s, Bad Honnef, Dec. 1999, to appear in New Astronomy Reviews; also available at http://wave.xray.mpe.mpg.de/conferences/nls1-workshop | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0005157 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0005157 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/960 | |
| dc.subject | Astrophysics | |
| dc.title | BLR velocities in optically and X-ray selected AGN samples | |
| dc.type | text |