Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jphcs.131a2007l&link_type=abstract
"Journal of Physics: Conference Series, Volume 131, Proceedings of "The Universe Under the Microscope - Astrophysics at High Ang
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
We have performed monitoring observations of the 3-millimeter flux density toward the Galactic center compact radio source Sgr A* with the Australia Telescope Compact Array (ATCA) since 2005 October. Careful calibrations of both elevation-dependent and time-dependent gains have been done to establish the variability behavior of Sgr A*. It has been found that during several observing epochs Sgr A* was quite active, showing significant intraday variation (IDV). Here we report a detected IDV event. On 2006 August 13, Sgr A* exhibits a maximum variation of 22% within 2 hrs, and two peaks with a separation of 4 hrs are seen. We discuss two possible scenarios, the orbiting hotspot model and the expanding plasmon model.
Huang Lei
Li Juan
Miyazaki Atsushi
Miyoshi Makoto
Sault Robert J.
No associations
LandOfFree
The variability of Sagittarius A* at 3-millimeters 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 The variability of Sagittarius A* at 3-millimeters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The variability of Sagittarius A* at 3-millimeters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-853620