Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rs......6..313k&link_type=abstract
Revue des Systèmes, vol. 6, n. 1-4, p. 313-317 (Visions for Infrared Astronomy, Paris, 20-22 March 2006)
Astronomy and Astrophysics
Astronomy
Stellar Interferometry, Heterodyne Interferometry, Frequency Comb, Vlbi, Cesium Fountain
Scientific paper
Frequency standards based on "Frequency Combs" are readily available for field-use allowing to either synthesize or phase stabilize laser sources operating in the astronomical Nband (8μm - 13μm) with unprecedented precision. Heterodyne receivers for 10μm with gas-lasers are in use in astronomy for at least 25 years. We describe at the conceptual design level an infrared Very-Long-Baseline Interferometer. Data reduction (correlation, phaseclosure and image reconstruction) could be based either on micro-wave links or on existing European VLBI infrastructure. The sensitivity of a 10μm VLBI network can be extrapolated to be a few Jansky per resolution element. The spatial resolution could approach 200 nano-arcsec, if a link between telescopes in Chile, North-America and Hawaii is considered. Science cases for such a system will be sketched.
Glindemann Andreas
Kaufl Hans Ulrich
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