Oral Presentation

Subhalo abundance matching with progenitor mass at varying redshift: Emergence of the ex-/in-situ stellar mass growth in HSC galaxy clustering?

Author(s): Shogo Masaki (NIT, Suzuka College), Daichi Kashino (Nagoya U.), Yen-Ting Lin (ASIAA)

Presenter: Shogo Masaki (National Institute of Technology, Suzuka College)

We propose a novel subhalo abundance matching model. Our model uses the progenitor mass at varying redshift as a stellar mass proxy at the time of observation. Our model reproduces the observed HSC galaxy clustering better than the widely-used peak velocity model. We interpret that the best-fit parameters in our model are compatible with the ex-situ stellar mass growth for higher-mass galaxies and the downsizing of in-situ star formation in lower-mass galaxies.