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Titolo:
IRON LINE-PROFILES INCLUDING EMISSION FROM WITHIN THE INNERMOST STABLE ORBIT OF A BLACK-HOLE ACCRETION DISC
Autore:
YOUNG AJ; ROSS RR; FABIAN AC;
Indirizzi:
UNIV CAMBRIDGE,INST ASTRON,MADINGLEY RD CAMBRIDGE CB3 0HA ENGLAND COLL HOLY CROSS,DEPT PHYS WORCESTER MA 01610
Titolo Testata:
Monthly Notices of the Royal Astronomical Society
fascicolo: 1, volume: 300, anno: 1998,
pagine: 11 - 15
SICI:
0035-8711(1998)300:1<11:ILIEFW>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
MCG-6-30-15;
Keywords:
ACCRETION, ACCRETION DISCS; BLACK HOLE PHYSICS; LINE, PROFILES; GALAXIES, INDIVIDUAL, MCG-6-30-15; X-RAYS, GENERAL;
Tipo documento:
Letter
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
A.J. Young et al., "IRON LINE-PROFILES INCLUDING EMISSION FROM WITHIN THE INNERMOST STABLE ORBIT OF A BLACK-HOLE ACCRETION DISC", Monthly Notices of the Royal Astronomical Society, 300(1), 1998, pp. 11-15

Abstract

Reynolds & Begelman have recently proposed a model in which the broadand extremely redshifted iron line seen during a deep minimum of the light curve of the Seyfert 1 galaxy MCG-6-30-15 originates from matterspiralling into a Schwarzschild black hole, contrary to previous claims that the black hole may be spinning rapidly. Here we calculate in detail the X-ray spectrum produced by their model using the full reflected continuum emission, including absorption features. This calculation takes into account the Doppler and relativistic effects. For the range of parameters that we consider, we find that the spectrum should show a large photoelectric absorption edge of iron, which is not seen inthe data. The absorption edge is a consequence of the line-emitting matter within the innermost stable orbit being highly ionized, and is largely independent of the parameters chosen for the model. If we restrict our attention to the 3-10 keV band we may effectively remove this absorption edge by fitting a steeper power law, but this results in a significant underprediction of the 0.4-0.5 keV flux. We conclude that the data on MCG-6-30-15 are more consistent with the Kerr than the Schwarzschild model.

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Documento generato il 07/07/20 alle ore 04:52:15