Chandra monitoring of UGC 4203: the structure of the X-ray absorber

Details Chandra monitoring of UGC 4203: the structure of the X-ray absorber Chandra monitoring of UGC 4203: the structure of the X-ray absorber

2010-05-17

arxiv.org/abs/1005.3052v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 Pages, 4 figures. Accepted for publication in MNRAS. Missing references added and typos corrected

Scientific paper

We present a Chandra monitoring campaign of the highly variable Seyfert galaxy UGC 4203 (the "Phoenix Galaxy") which revealed variations in the X-ray absorbing column density on time scales of two weeks. This is the third, clear case, after NGC 1365 and NGC 7582, of dramatic N_H variability on short time scales observed in a "changing look" source, i.e. an AGN observed in the past in both a reflection-dominated and a Compton-thin state. The inferred limits on the distance of the X-ray absorber from the center suggest that the X-ray "torus" could be one and the same with the broad emission line region. This scenario, first proposed for an "ad-hoc" picture for NGC 1365, may be the common structure of the circumnuclear medium in AGN.

Affiliated with

Also associated with

No associations

Rating

Chandra monitoring of UGC 4203: the structure of the X-ray absorber 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 Chandra monitoring of UGC 4203: the structure of the X-ray absorber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra monitoring of UGC 4203: the structure of the X-ray absorber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-56640