First Results on the Diffuse Ionized Hydrogen Emission from the Galactic Plane with Cryogenic Solid Fabry-Perot Spectrometer.

Details First Results on the Diffuse Ionized Hydrogen Emission from the Galactic Plane with Cryogenic Solid Fabry-Perot Spectrometer. First Results on the Diffuse Ionized Hydrogen Emission from the Galactic Plane with Cryogenic Solid Fabry-Perot Spectrometer.

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20513904k&link_type=abstract

American Astronomical Society Meeting 205, #139.04; Bulletin of the American Astronomical Society, Vol. 36, p.1573

Astronomy and Astrophysics

Astronomy

Scientific paper

We developed and built a high resolution near-infrared temperature tunable cryogenic spectrometer with solid Fabry-Perot etalons. Using silicon etalons allowed to build a very compact high throughput spectrometer, that is equivalent to a much larger gas spaced Fabry-Perot interferometer. The whole spectrometer is cryogenically cooled to reduce thermal background radiation. The instrument is used in a non-imaging integral mode with the telescope pupil imaged onto the detector: all sources contribute equally to the resulting spectrum. The instantaneous spectral coverage of the instrument is 300 km/s at a resolving power of 12000. With a small telescope of 12.5" in diameter and 30' field of view the instrument is optimized for large scale diffuse objects studies. First observations the diffuse Brackett-gamma emission line of hydrogen from the inner Galactic plane has been carried out with this spectrometer last summer at Mauna Kea observatory. A number of fields in the Galactic plane at longitudes 355 to 35 degrees with 1 degree step have been observed.
This project is supported by NASA funding.

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