|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The innermost dusty structure in AGN as probed by the Keck interferometer | | Makoto Kishimoto
; Sebastian F. Hoenig
; Robert Antonucci
; Richard Barvainis
; Takayuki Kotani
; Konrad R.W. Tristram
; Gerd Weigelt
; Ken Levin
; | | Date: |
24 Dec 2010 | | Abstract: | We are now exploring the inner region of Type 1 AGNs with the Keck
interferometer in the near-infrared. Here we report further measurements of
K-band (2.2 um) visibilities on four more targets, namely AKN120, IC4329A,
Mrk6, and the radio-loud QSO 3C273 at z=0.158. The observed visibilities are
quite high for all the targets. We interpret these as an indication of
partially resolving the dust sublimation region. The effective ring radii
derived from the observed visibilities approximately scale with L^1/2 where L
is the AGN luminosity. Comparing the radii with those from independent
optical-infrared reverberation measurements, the new data further support our
previous claim that the interferometric ring radius is either roughly equal to
or slightly larger than the reverberation radius. We interpret the ratio of
these two radii for a given L as an approximate probe for the radial
distribution of the inner accreting material. We show tentative evidence that
this inner radial structure might closely be related to the radio-loudness of
the central engine. Finally, we re-observed the brightest Seyfert 1 galaxy
NGC4151. The marginally higher visibility at a shorter projected baseline,
compared to our previous measurements obtained one year before, supports the
partial resolution of the inner structure. We did not detect any significant
change in the implied emission size when the K-band flux is brightened up by a
factor of 1.5 over a time interval of one year. | | Source: | arXiv, 1012.5359 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER