Oral Presentation

Comparison of cosmological simulations and deep submillimetre galaxy surveys

Author(s): Shohei Aoyama(ASIAA); Hiroyuki Hirashita(ASIAA); Chen-Fatt Lim(ASIAA, NTU); Yu-Yen Chang(ASIAA); Wei-Hao Wang(ASIAA); Kentaro Nagamine(Osaka University); Ikkoh Shimizu (Osaka University)

Presenter: Shohei Aoyama (Academia Sinica Institute of Astronomy and Astrophysics (ASIAA))

Based on the recent progress in submillimetre surveys by single-dish telescopes, we examine the consistency (and inconsistency) between the theoretically predicted cosmological simulation incorporating dust evolution and the observational aspect, for which we adopt recent SCUBA-2 surveys. We focus on basic observational properties of dust emission such as dust temperature, size of infrared (IR)-emitting region, IR luminosity function and IRX--$\beta $ relation.
After confirming that our models reproduce the local galaxy properties, we examine the STUDIES sample at $z\sim 1$--4, finding that the simulation reproduces the aforementioned quantities at $z\sim 1$--4 except the IR luminosity function at the massive end ($\gtrsim 10^{12}$\,L$_{\sun}$). This means that the current simulation correctly reproduces the overall scaling among dusty region size and luminosity (or star formation rate), but lacks concentrated extreme starburst component at $z\gtrsim 3$. We also discuss extinction curves and possible AGN contribution.