Physics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..438l&link_type=abstract
Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at
Physics
Scientific paper
The FIR/sub-mm region is unique in the electromagnetic spectrum in its potential for vast increases in sensitivity and angular resolution, and, as a result, information vital to our understanding of the evolution of structure in the universe. Because galaxy formation and significant evolution are believed to occur at redshifts z < 4, this spectral window will contain their thermal dust emission and energetically important interstellar gas cooling line emission. SPIRIT and SPECS are space-based cryogenic imaging and spectral Michelson interferometers that operate in the wavelength range 40 - 500 μm. SPIRIT would be built on a deployable, rotating boom, giving access to baseline lengths of ~ 30 m and shorter. SPIRIT would break the confusion barrier, enabling measurements of the spectra of individual high-z galaxies. SPECS uses formation flying to achieve maximum baseline lengths of about 1 km and attain HST-class angular resolution. SPECS will enable us to probe dust-enshrouded star forming regions and measure physical conditions in galaxies going back to the epoch of their formation.
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