VU Physics and Astronomy Colloquium

Friday, October 3, at 3:20 PM in NSC 224. Join us for refreshments in NSC 231 at 3:05 PM.

"Imaging the Surface of Stars Beyond the Sun"

  

Dr. John Monnier, Department of Astronomy, University of Michigan

Under the best conditions, telescope diffraction limits the angular resolution for astronomical imaging. Using interferometry, we can coherently combine light from widely-separated telescopes to overcome the single-telescope diffraction limit to boost our imaging resolution by orders of magnitude. I will review recent technical advances combining four telescopes of the CHARA Array on Mt. Wilson, CA, with baselines of 330 meters allowing imaging with sub-milli-arcsecond resolution. I will present the first resolved images of main sequence stars besides the Sun and show first results imaging interacting binary systems.