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High resolution Michelson interferometer for airborne infrared astronomical observations. 1: Concept and performance
Applied Optics
|February 20, 2010
Summary
A new Michelson interferometer was developed for the Kuiper Airborne Observatory to study infrared line emission from H II regions. This instrument achieved high resolution, providing valuable data on celestial objects like the Orion nebula.
Area of Science:
- Astronomy
- Astrophysics
- Infrared Spectroscopy
Background:
- Infrared (IR) line emission from H II regions provides crucial information about star formation and the interstellar medium.
- Previous instruments had limitations in resolution and wavelength coverage for observing these faint emissions.
Purpose of the Study:
- To design and build a Michelson interferometer for the 91-cm telescope on NASA's Gerard P. Kuiper Airborne Observatory.
- To measure infrared line emission from H II regions with high spectral resolution.
Main Methods:
- Utilized a Michelson interferometer in a rapid scan mode.
- Operated the instrument in the 10 to 300 micrometer wavelength range.
- Employed a minicomputer for on-line data processing and instrument control.
Main Results:
- Achieved a spectral resolution of 0.02 cm(-1).
- Successfully measured line emission from the Orion nebula.
- Obtained data on atmospheric emissions during initial flights.
Conclusions:
- The developed Michelson interferometer is effective for studying IR line emission from H II regions.
- The instrument's performance met theoretical expectations during its first observational flights.
- This tool enhances capabilities for astrophysical research using airborne platforms.
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