Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Astronomical spectroscopy"”.
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A technique for astronomical spectroscopy with a multi-aperture telescope
A technique for acquiring spectral line data using a multi-aperture telescope is described. The multi-aperture principle and the criteria which led to the selection of a dispersive spectrometer are discussed. The problem of linking telescope and spectrometer has been solved by incorporating low …
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Chemical physics and astrochemistry of H3+ and sub Doppler mid infrared spectroscopy of molecular ions
… with electrons and with molecular hydrogen at astronomically relevant temperatures are described. The results of these laboratory measurements are included into a model of the hydrogenic chemistry of diffuse molecular clouds, in which an excess of para-H3+ is observed relative to its expected …
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Investigations in time and of space using the FIRST survey : radio source variability and the evolution of FR II quasars
The FIRST survey covered ~ 10,000 deg² of the sky over a decade, providing unprecedented levels of flux density sensitivity (~ 1 mJy) at 1.4 GHz, uniformity to within 15% (at ~ 0.15 mJy rms), 5".4 angular resolution, astrometric accuracy to better than 1" and has cataloged ≥ 800,000 sources. It has …