Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-04-19
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
20 pages, includes 10 figures, submitted to ApJ
Scientific paper
We present results from monitoring observations of the gravitationally lensed quasar RX J1131-1231 performed with the Chandra X-ray Observatory. The X-ray observations were planned with relatively long exposures that allowed a search for energy-dependent microlensing in the soft (0.2-2 keV) and hard (2-10 keV) light curves of the images of RX J1131-1231. We detect significant microlensing in the X-ray light-curves of images A and D, and energy-dependent microlensing of image D. The magnification of the soft band appears to be larger than that in the hard band by a factor of ~ 1.3 when image D becomes more magnified. This can be explained by the difference between a compact, softer-spectrum corona that is producing a more extended, harder spectrum reflection component off the disk. This is supported by the evolution of the fluorescent iron line in image D over three consecutive time-averaged phases of the light curve. In the first period, a Fe line at E = 6.36(-0.16,+0.13) keV is detected (at > 99% confidence). In the second period, two Fe lines are detected, one at E = 5.47(-0.08,+0.06) keV (detected at > 99% confidence) and another at E = 6.02(-0.07,+0.09) keV (marginally detected at > 90% confidence), and in the third period, a broadened Fe line at 6.42(-0.15,+0.19) keV is detected (at > 99% confidence). This evolution of the Fe line profile during the microlensing event is consistent with the line distortion expected when a caustic passes over the inner disk where the shape of the fluorescent Fe line is distorted by General Relativistic and Doppler effects.
Blackburne Jeffery A.
Chartas George
Dai Xian-Xin
Kochanek Chris S.
Moore Daniel
No associations
LandOfFree
Revealing the Structure of an Accretion Disk Through Energy Dependent X-ray 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 Revealing the Structure of an Accretion Disk Through Energy Dependent X-ray Microlensing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revealing the Structure of an Accretion Disk Through Energy Dependent X-ray Microlensing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4898