Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...637..620p&link_type=abstract
The Astrophysical Journal, Volume 637, Issue 2, pp. 620-630.
Astronomy and Astrophysics
Astronomy
25
Cosmology: Gravitational Lensing, Galaxies: Quasars: Individual: Alphanumeric: H1413+117, Quasars: Individual (Mg J0414+0534), Quasars: Individual (Qso 2237+0305), X-Rays: Galaxies
Scientific paper
The observed enhancement of the Fe Kα line in three gravitationally lensed QSOs (MG J0414+0534, QSO 2237+0305, and H1413+117) is interpreted in terms of microlensing, even when equivalent X-ray continuum amplification is not observed. In order to interpret these observations, first we studied the effects of microlensing on quasar spectra produced by a straight fold caustic crossing over a standard relativistic accretion disk. The disk emission was analyzed using the ray-tracing method, considering Schwarzschild and Kerr metrics. When the emission is separated into two regions (an inner disk corresponding to the Fe Kα line and an outer annulus corresponding to the continuum, or vice versa), we find microlensing events that enhance the Fe Kα line without noticeable amplification of the X-ray continuum, but only during a limited time interval. Continuum amplification is expected if a complete microlensing event is monitored. Second, we studied a more realistic case of amplification by a caustic magnification pattern. In this case we could satisfactorily explain the observations if the Fe Kα line is emitted from the innermost part of the accretion disk while the continuum is emitted from a larger region. We also studied the chromatic effects of microlensing, finding that the radial distribution of temperature in the accretion disk, combined with microlensing itself, can induce wavelength-dependent variability of ~30% for microlenses with very small masses. All these results show that X-ray monitoring of gravitational lenses is a method well suited for studying the innermost structure of active galactic nucleus accretion disks.
Abajas Cristina
Chartas George
Jovanovic Pedja
Mediavilla Evencio
Muñoz Joseph A.
No associations
LandOfFree
A Study of the Correlation between the Amplification of the Fe Kα Line and the X-Ray Continuum of Quasars due to Microlensing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Study of the Correlation between the Amplification of the Fe Kα Line and the X-Ray Continuum of Quasars due to Microlensing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Study of the Correlation between the Amplification of the Fe Kα Line and the X-Ray Continuum of Quasars due to Microlensing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1766598