A simple numerical experiment on the dust temperature bias for Lyman break galaxies at <i>z</i> ? 5

Abstract Some studies suggest that the dust temperatures (Td) in high-redshift (z ? 5) Lyman break galaxies (LBGs) are high. However, possible observational bias Td is yet to be understood. Thus, we perform a simple test using random realizations of LBGs with various stellar masses, temperatures, and dust-to-stellar mass ratios, examine how sample detected by ALMA biased terms Td. We show tends miss high-Td objects even at total luminosity LIR &amp;gt; 1011 L?. are, however, basically selected UV luminosity. The dust-temperature UV-selected complicated because competing effects between high low abundance. For Band 6, there no tendency being more easily our experiment. observed trend z 5 real. also propose 450 $\rm {\mu m}$ band useful further clarifying temperatures. To overcome current shallowness observations, future Antarctic 30-m class telescope suitable atmospheric condition for wavelengths $\lesssim 450~\rm m}$, where detection not confusion-limited. find that, this telescope, an LIR-selected log (LIR/L?) 11 constructed 5, intermediate-M? (stellar mass) range [9 &amp;lt; (M?/M?) 9.5] much improved, especially