Combining high spectral and spatial resolution in the mid-infrared

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

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.

Citation Download Citation

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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