Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-07-19
Astronomy and Astrophysics
Astrophysics
10 pages, 3 figures, to appear in 'From z machines to ALMA', A.J. Baker, J. Glenn, A.I. Harris, J.G. Mangum, and M.S. Yun eds.
Scientific paper
A significant population of distant sub-millimeter-selected galaxies (SMGs) with powerful dust continuum emission that matches the luminosity of the brightest QSOs and exceeds that of most extreme local galaxies detected by IRAS, has been known for almost a decade. The full range of powerful ground- and space-based facilities have been used to investigate them, and a good deal of information about their properties has been gathered. This meeting addresses some of the key questions for better understanding their properties. While continuum detection is relatively efficient, a spectrum is always required both to determine a distance/luminosity, and to probe astrophysics: excitation conditions, the total mass, the mass distribution and degree of dynamical relaxation. Once a redshift is known, then the associated stellar mass can be found, and more specialized spectrographs can be used to search for specific line diagnostics. The first generation of submm surveys, have yielded a combined sample of several hundred SMGs. Here we discuss the size and follow-up of future SMG samples that will be compiled in much larger numbers by JCMT-SCUBA2, Herschel, Planck, LMT, ALMA, and a future large-aperture (25-m-class) submm/far-IR wide-field ground-based telescope CCAT, planned to operate at a Chilean site even better than ALMA's. The issues concerning placing SMGs in the context of their environments and other populations of high-redshift galaxies are discussed.
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