Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2010-09-28
Proc. SPIE vol. 7734, 77341C (2010)
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
10 pages, 6 figures; presented at the SPIE conference "Optical and Infrared Interferometry II", San Diego, CA, USA (June 2010)
Scientific paper
10.1117/12.856496
Sub milli-arcsecond imaging in the visible band will provide a new perspective in stellar astrophysics. Even though stellar intensity interferometry was abandoned more than 40 years ago, it is capable of imaging and thus accomplishing more than the measurement of stellar diameters as was previously thought. Various phase retrieval techniques can be used to reconstruct actual images provided a sufficient coverage of the interferometric plane is available. Planned large arrays of Air Cherenkov telescopes will provide thousands of simultaneously available baselines ranging from a few tens of meters to over a kilometer, thus making imaging possible with unprecedented angular resolution. Here we investigate the imaging capabilities of arrays such as CTA or AGIS used as Stellar Intensity Interferometry receivers. The study makes use of simulated data as could realistically be obtained from these arrays. A Cauchy-Riemann based phase recovery allows the reconstruction of images which can be compared to the pristine image for which the data were simulated. This is first done for uniform disk stars with different radii and corresponding to various exposure times, and we find that the uncertainty in reconstructing radii is a few percent after a few hours of exposure time. Finally, more complex images are considered, showing that imaging at the sub-milli-arc-second scale is possible.
Dravins Dainis
Holmes Richard
Jensen Hannes
Kieda David
LeBohec Stephan
No associations
LandOfFree
Stellar Intensity Interferometry: Imaging capabilities of air Cherenkov telescope arrays 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 Stellar Intensity Interferometry: Imaging capabilities of air Cherenkov telescope arrays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar Intensity Interferometry: Imaging capabilities of air Cherenkov telescope arrays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-694590