SIMBAD references

We construct a SCUBA-2 450 µm map in the COSMOS field that covers an area of 300 arcmin² and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 µm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z <= 3, with a median of z=1.79_–0.15^+0.03 % . About 35_–25⁺³² % of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M_*). By fitting the far-infrared spectral energy distributions, we find that our 450 µm selected sample has a wide range of dust temperatures (20 K <= T_d <= 60 K), with a median of T_d=38.3_–0.9^+0.4 K. We do not find a redshift evolution in dust temperature for sources with L_IR> 10¹²L_☉ at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR-M_* relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX-β_UV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 µm sources and measure their comoving SFR densities (SFRDs). The contribution of the L_IR> 10¹²L_☉ population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)^3.9±1.1) and dominates the total SFRD at z >= 2.