Emission and absorption in Narrow-Line Seyfert 1 Galaxies
| dc.creator | Constantin, Anca | |
| dc.creator | Shields, Joseph C. | |
| dc.date | 2003-10-21 | |
| dc.date.accessioned | 2026-07-25T12:07:41Z | |
| dc.description | The emission and absorption attributes of the UV-blue nuclear spectra of the Narrow-Line Seyfert 1 (NLS1) galaxies are analyzed based on high quality archival HST observations. Measurements from composite spectra as well as from individual sources reveal differences from the more general AGN samples: NLS1s have steeper (redder) UV-blue continua. Objects with UV line absorption show redder spectra, suggesting that internal dust is important in modifying the continuum shapes. A strong relationship is found between the slopes of the power-laws that best fit the UV-blue continua and the luminosities: the more luminous sources have bluer SEDs. This trend is possibly attributed to a luminosity-dependent inner geometry of the obscuring (dusty) material. | |
| dc.description | 4 pages. To appear in "AGN Physics with the Sloan Digital Sky Survey", ed. G.T. Richards & P.B. Hall (ASP Conference Series) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310623 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310623 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/7694 | |
| dc.subject | Astrophysics | |
| dc.title | Emission and absorption in Narrow-Line Seyfert 1 Galaxies | |
| dc.type | text |