Dusty extreme starbursts in the early universe

Abstract

Recent rapid advancements in wide and deep surveys at millimeter and submillimeter (mm and submm) wavelengths have led to successive discoveries of numerous mm/submm-bright galaxies (SMGs), i.e. , dusty extreme starburst population in the early universe. They contribute significantly to the cosmic star formation rate density at z > 1, and evolutionally links to bright quasars and the most massive giant elliptical galaxies have also been suggested. After brief overview of the mm/submm deep surveys to date, characteristics of deep surveys at mm/submm waveband is discussed; the ground-based long-wavelengths (~1 mm) deep surveys are complementarly to short-wavelengths submm surveys with Herschel in order to address the redshift distribution of dusty starburst galaxies. Some recent hot issues of SMGs are also described, including discovery of ultra-bright population, the origin of extreme starburst in SMGs, discovery of a protoquasar-like SMG in the core of a protocluster, and a quest for high-redshift (z > 4) SMGs.