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====== Navy Precision Optical Interferometer ======
{{usic:files:NPOI.Usic.jpg|NPOI.Usic.jpg}}\\ 
**Navy Precision Optical Interferometer** ([[http://www.nofs.navy.mil/projects/npoi/|NPOI]])
\\  From the highest angular resolution Ha observations to date, NPOI found the **Be stars g Cas and f Per** to have circum-stellar emission consistent with a Gaussian intensity distribution rather than a uniform disk or ring-like structure.\\ \\  In 2002, NPOI accomplished **the first 6-telescope image** by O/IR interferometry, producing an image of the triple system h Vir.\\ \\  NPOI observations show that **Vega is a pole-on rapid rotator** spinning at 93% of its breakup speed, with more than 2400 K difference in temp-erature from pole to equator. The temperature variation accounts for Vega’s near-IR excess and explains why no single atmospheric model accounts for its spectrum.

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