Physics – Optics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..463s&link_type=abstract
Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at
Physics
Optics
Scientific paper
It is in the gamma-ray band, the shortest wavelength part of the electromagnetic spectrum, where diffraction limitations are least constraining, that one might hope for the highest angular resolution. But the angular resolution of gamma-ray instruments up to now has been much poorer than that obtained in other wavebands. Ironically, it is at the opposite end of the spectrum, at radio wavelengths that the highest angular resolution is obtained. It is only because (with currently achievable sensitivities) gamma ray sources are either rather diffuse or few and far between, that any progress has been possible in gamma-ray astronomy. What developments are in the pipeline? What are the real limitations and prospects for high angular resolution gamma-ray astronomy? Is it possible to make diffraction limited optics for gamma-ray wavelengths? These issues are reviewed, along with a consideration of the science that the developments might lead to and the goals which the science requirements set.
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