Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...623l..93r&link_type=abstract
The Astrophysical Journal, Volume 623, Issue 2, pp. L93-L96.
Astronomy and Astrophysics
Astronomy
96
Galaxies: Active, Galaxies: Individual: Ngc Number: Ngc 1365, X-Rays: Galaxies
Scientific paper
We present multiple Chandra and XMM-Newton observations of the type 1.8 Seyfert galaxy NGC 1365, which shows the most dramatic X-ray spectral changes observed so far in an active galactic nucleus: the source switched from reflection-dominated to transmission-dominated and back in just 6 weeks. During this time the soft thermal component, arising from an ~1 kpc region around the center, remained constant. The reflection component is constant at all timescales, and its high flux relative to the primary component implies the presence of thick gas covering a large fraction of the solid angle. The presence of this gas, and the fast variability timescale, suggest that the Compton-thick to Compton-thin change is due to variation in the line-of-sight absorber rather than to extreme intrinsic emission variability. We discuss a structure of the circumnuclear absorber/reflector that can explain the observed X-ray spectral and temporal properties.
Baldi Alessandro
Elvis Martin
Fabbiano Giuseppina
Risaliti Guido
Zezas Andreas
No associations
LandOfFree
Rapid Compton-thick/Compton-thin Transitions in the Seyfert 2 Galaxy NGC 1365 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 Rapid Compton-thick/Compton-thin Transitions in the Seyfert 2 Galaxy NGC 1365, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid Compton-thick/Compton-thin Transitions in the Seyfert 2 Galaxy NGC 1365 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1454370