Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
IRON K-ALPHA LINES FROM X-RAY PHOTOIONIZED ACCRETION DISKS
Autore:
MATT G; FABIAN AC; ROSS RR;
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: 262, anno: 1993,
pagine: 179 - 186
SICI:
0035-8711(1993)262:1<179:IKLFXP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVE GALACTIC NUCLEI; COLD MATTER; SEYFERT-1 GALAXIES; CROSS-SECTIONS; FLUORESCENCE; REFLECTION; SPECTRA; VARIABILITY; ABSORPTION; SIGNATURES;
Keywords:
ACCRETION, ACCRETION DISKS; LINE-PROFILES; GALAXIES-ACTIVE; X-RAYS-GALAXIES; X-RAYS-STARS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
G. Matt et al., "IRON K-ALPHA LINES FROM X-RAY PHOTOIONIZED ACCRETION DISKS", Monthly Notices of the Royal Astronomical Society, 262(1), 1993, pp. 179-186

Abstract

The properties of the iron Kalpha line emitted by an accretion disc illuminated by an external X-ray source are calculated for different values of the disc accretion rate m, and for two different source geometries: a point source located on the disc axis and an extended source above the innermost part of the disc. We find that for large values of rh the matter can be significantly ionized, and the iron line equivalent width can reach values as high as 250 eV for the point source, and up to about 400 eV for the extended source; the line centroid energy, in the emitting rest frame, is significantly higher than 6.4 keV, the value for neutral iron. A further increase of m leads to a strong decrease of the line intensity, because the iron becomes fully stripped inthe inner region of the disc. The line profiles in the Schwarzschild metric are also calculated, and for the point source they appear much more complex than those obtained assuming neutral matter.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/08/20 alle ore 00:44:12