Long Term Profile Variability of Double-Peaked Emission Lines in AGNs
| dc.creator | Lewis, Karen T. | |
| dc.creator | Eracleous, Michael | |
| dc.creator | Halpern, Jules P. | |
| dc.creator | Storchi-Bergmann, Thaisa | |
| dc.date | 2003-09-23 | |
| dc.date.accessioned | 2026-07-07T02:09:43Z | |
| dc.date.available | 2026-07-07T02:09:43Z | |
| dc.description | An increasing number of AGNs exhibit broad, double-peaked Balmer emission lines, which are thought to arise from the outer regions of the accretion disk which fuels the AGN. The line profiles are observed to vary on a characteristic timescales of 5-10 years. The variability is not a reverberation effect; it is a manifestation of physical changes in the disk. Our group has monitored a set of 20 double-peaked emitters for the past 8 years (longer for some objects). Here, we characterize the variability of the double-peaked H alpha line profiles in five objects from our sample. By experimenting with simple models, we find that disks with a single precessing spiral arm are able to reproduce many of the variability trends that are seen in the data. | |
| dc.description | 4 pages, 1 figure, uses newpasp.sty To appear in "AGN Physics with the Sload Digital Sky Survey" Princeton, July 27-30, 2003 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0309624 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0309624 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6540 | |
| dc.subject | Astrophysics | |
| dc.title | Long Term Profile Variability of Double-Peaked Emission Lines in AGNs | |
| dc.type | text |