Blueshifted [O III] Emission: Indications of a Dynamic NLR
| dc.creator | Boroson, Todd | |
| dc.date | 2005-05-06 | |
| dc.date.accessioned | 2026-07-07T11:24:22Z | |
| dc.date.available | 2026-07-07T11:24:22Z | |
| dc.description | The [O III] 5007 line is commonly used as an indicator of the systemic redshift of AGNs. Also, recent studies have used the width of this emission line as a proxy for the stellar velocity dispersion in the host galaxy. This paper calls both of these assumptions into question by analyzing a sample of approximately 400 AGN spectra from the first data release of the Sloan Digital Sky Survey. These spectra show that the low-ionization forbidden lines ([O II], [N II], [S II]) define a consistent redshift, but that the peak of the [O III] line is blueshifted in approximately half of the AGNs with respect to that redshift. For the sample studied here, the average shift is 40 km/s, with the largest shift being over 400 km/s. The magnitude of this shift is found to be correlated with a number of properties, including the width of the [O III] line and the Eddington ratio (L/L$_{Edd}$), derived from the luminosity and width of H-beta. | |
| dc.description | 17 pages, 4 figures, accepted for publication in the Astronomical Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0505127 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0505127 | |
| dc.identifier | Astron.J.130:381-386,2005 | |
| dc.identifier | doi:10.1086/431722 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195168 | |
| dc.subject | Astrophysics | |
| dc.title | Blueshifted [O III] Emission: Indications of a Dynamic NLR | |
| dc.type | text |