Combining high spectral and spatial resolution in the mid-infrared

John D. Monnier; William C. Danchi; David D. Snyder Hale; Peter G. Tuthill; Charles H. Townes

doi:10.1117/12.390255

5 July 2000 Combining high spectral and spatial resolution in the mid-infrared

John D. Monnier, William C. Danchi, David D. Snyder Hale, Peter G. Tuthill, Charles H. Townes

Author Affiliations +

Proceedings Volume 4006, Interferometry in Optical Astronomy; (2000) https://doi.org/10.1117/12.390255
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

A novel, fast-switching filterbank system has been incorporated into the Infrared Spatial Interferometer to allow high spectral resolution observations of mid-infrared spectral lines, while precisely calibrating atmospheric fluctuations. This system allows the complex visibility in a spectral line to be measured relative to the continuum with high precision, about 1% in visibility amplitude and a few degrees in visibility phase. The high spectral resolving power (R approximately 100000) and spatial resolution (1/10 arcsecond) allow the formation radii of various polyatomic molecules (e.g., ammonia and silane) to be directly measured. Initial results for carbon star IRC + 10216 and red supergiant VY CMa are presented.

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John D. Monnier, William C. Danchi, David D. Snyder Hale, Peter G. Tuthill, and Charles H. Townes "Combining high spectral and spatial resolution in the mid-infrared", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); https://doi.org/10.1117/12.390255

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