Conveners
Galaxy: formation & population
- Xiaohu Yang (Shanghai JiaoTong University)
Galaxy: formation & population
- xi kang (zhejiang university)
I will describe a scenario in which galaxy formation and the growth of supermassive black holes are regulated by the two-stage assembly of dark matter halos.
In this talk I present the evolution of the star formation rates (SFRs) / stellar masses of galaxies and the dark matter halo mass accretion histories (MAHs) for the last 13 billion years of the Universe. The observed star formation rate-stellar mass (SFR-M*) relation and the "observed" cosmic star formation rate density (CSFRD) represent both important canvases for our current knowledge of...
We investigate the formation history of massive disc galaxies in hydrodynamical simulation -- the IllustrisTNG, to study why massive disc galaxies survive through cosmic time. 83 galaxies in the simulation are selected with M$_{*,z=0}$ $>8\times10^{10}$ \Msun and kinematic bulge-to-total ratio less than $0.3$. We find that 8.4 percent of these massive disc galaxies have quiet merger histories...
The removal/strangulating of gas in cluster environments cause the stop of star formation, especially on extended cold disks, while tidal shocking/stripping might destroy or heat the cold disks in galaxies formed before fell into the cluster. The cold disk fraction and stellar population provide fossil records on how the cluster environments impact on the galaxy structure formation.
In the...
The halo assembly bias, a phenomenon referring to dependencies of the large-scale bias of a dark matter halo other than its mass, is a fundamental property of the standard cosmological model. By utilizing the constrained simulation Elucid that faithfully reproduces the observed structures larger than 2 Mpc in the local universe, for a sample of 634 massive clusters at z<0.12, we found their...
In this talk, I will present a study of ultracompact dwarf (UCD) galaxies in the Virgo cluster based mainly on imaging from the Next Generation Virgo Cluster Survey (NGVS). We have identified more than 600 candidate UCDs, from the core of Virgo out to its virial radius. Candidates have been selected through a combination of magnitudes, ellipticities, colors, surface brightnesses, half-light...
In anticipation of the ongoing and upcoming next-generation surveys, we present galaxy catalog by the well-established LGalaxies semi-analytic model and galaxy emission line catalog by post-processing. We have made modifications to the models to solve the time convergence problem and re-calibrated the parameters to accurately reproduce the observed black hole mass function at z~0. Our catalog...
