The Frequency of Polarized Broad Emission Lines in Type 2 Seyfert Galaxies

Autor:	Alexei V. Filippenko, Aaron J. Barth, Edward C. Moran, Laura E. Kay
Jazyk:	angličtina
Rok vydání:	2000
Předmět:	Physics 010308 nuclear & particles physics Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Type (model theory) 01 natural sciences Galaxy Space and Planetary Science 0103 physical sciences Emission spectrum 010303 astronomy & astrophysics
Popis:	We have discovered polarized broad emission lines in five type 2 Seyfert galaxies (NGC 424, NGC 591, NGC 2273, NGC 3081, and NGC 4507), establishing that these objects are type 1 Seyferts obscured by dense circumnuclear material. The galaxies are part of a distance-limited sample of 31 Seyfert 2s, for which spectropolarimetric observations are now complete. Combined with published reports, our results indicate that at least 11 of the galaxies in this sample, or > 35%, possess hidden broad-line regions. This represents the first reliable estimate of the frequency of polarized broad emission lines in type 2 Seyferts, which has important implications for the general applicability of Seyfert unification models. 13 pages, including 5 figures. Accepted for publication in ApJ Letters
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79f4715a2df1484778b9a5fc305dec0a http://arxiv.org/abs/astro-ph/0007357 Zobrazit plný text záznamu