Ushering in sub-arcsecond angular resolution observatories in the far-infrared: The case for a double-Fourier interferometer
The paper argues that achieving sub-arcsecond resolution in far-infrared astronomy requires a space-based double-Fourier interferometer (DFI). This technique is necessary to resolve fine structures in star formation, exoplanetary systems, and galaxies. The DFI promises an order of magnitude improvement over current ground facilities by leveraging cryocoolers and sensitive detectors.