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Titolo:
Supersolar metal abundances and the broad line region of narrow-line seyfert 1 galaxies
Autore:
Komossa, S; Mathur, S;
Indirizzi:
Max Planck Inst Extraterr Phys, D-85740 Garching, Germany Max Planck Inst Extraterr Phys Garching Germany D-85740 arching, Germany Ohio State Univ, Columbus, OH 43210 USA Ohio State Univ Columbus OH USA 43210 State Univ, Columbus, OH 43210 USA
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 3, volume: 374, anno: 2001,
pagine: 914 - 918
SICI:
1432-0746(200108)374:3<914:SMAATB>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-SPECTRA; ACTIVE GALACTIC NUCLEI; WARM ABSORBERS; EMISSION; NGC-4051; QUASARS; AGN; EVOLUTION; MODELS; ROSAT;
Keywords:
galaxies : active; galaxies : nuclei; galaxies : abundances; galaxies : Seyfert;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Komossa, S Max Planck Inst Extraterr Phys, Postfach 1603, D-85740 Garching, Germany Max Planck Inst Extraterr Phys Postfach 1603 Garching Germany D-85740
Citazione:
S. Komossa e S. Mathur, "Supersolar metal abundances and the broad line region of narrow-line seyfert 1 galaxies", ASTRON ASTR, 374(3), 2001, pp. 914-918

Abstract

Narrow-line Seyfert 1 galaxies (NLSy1) are intriguing due to their extremecontinuum 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.

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Documento generato il 11/07/20 alle ore 17:37:59