A Laboratory Test-bed for a Spectral and Spatial Interferometry

Computer Science – Performance

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Scientific paper

The astronomical community is showing a growing interest in the observation of sub-millimetre waves with high angular resolution (sub arc second) and sensitivity in both spatial and spectral domain. This is the so-called Spectral-Spatial Interferometry, multi-Fourier Transform Spectroscopy or Double Interferometry (Mariotti and Ridgway (1988); Ohta et al. (2006, 2007)). With increased spatial and spectral information, a number of interesting science cases can be investigated. For example, in the far infrared, this system could characterise gas, ice and dust in disks undergoing planetary formation, resolve the cosmic Infra Red Background, investigate the formation and evolution of AGN and trace Milky Way type galaxy formation, among others. Here a test-bed for spatial and spectral interferometry in the 5-30 cm-1 band is described, and first experimental results are presented. The performance of the test-bed is analyzed.

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