Query : 2001A&A...374..914K

2001A&A...374..914K - Astronomy and Astrophysics, volume 374, 914-918 (2001/8-2)

Research Note Supersolar metal abundances and the Broad Line Region of Narrow-line Seyfert1 galaxies.


Abstract (from CDS):

Narrow-line Seyfert1 galaxies (NLSy1) are intriguing due to their extreme continuum and emission line properties which are not yet well understood. This paper is motivated by the recent suggestion that NLSy1 galaxies might be young active galactic nuclei (AGNs) and that they may have supersolar metal abundances. We have examined the stability of broad emission line region (BLR) clouds under isobaric perturbation and its dependence on gas metal abundances. We show that supersolar metallicity increases the range where multiple phases in pressure balance may exist. This is particularly important for NLSy1s with steep X-ray spectra where it delays the trend of hindrance of a multi-phase equilibrium. Finally, the role of warm absorbers in the context of this scenario is assessed.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: abundances - galaxies: Seyfert

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2152 1
2 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3649 2
3 6C 170204+454510 Sy1 17 03 30.3824218008 +45 40 47.166180564   16.0       ~ 155 2

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