Baryon-dominated dwarf galaxies (BDDGs) offer a sensitive probe of energy injection in low-mass halos. Using hydrodynamical simulations of high-velocity collisions between gas-rich ultra-diffuse galaxies, we study how progenitor structure affects BDDG formation. We model systems with varying central density profiles, corresponding to different baryonic binding energies, and introduce a gas...
The magnitude gap between the central and satellite galaxies encodes information about the mass accretion history of a dark matter halo, and serves as a useful observational probe for the mass distribution in a halo. In this work, we perform the first weak lensing test of the connections between the magnitude gap and the halo profile. We measure the halo profiles of isolated central galaxies...
Conditional Luminosity Function (CLF) means the Luminosity Function (LF) of a similar dark halo mass. It is more meaningful from the perspective of the galaxy-halo connection. CLFs of halo mass $M_h > 10^{12} 𝑀_\odot$ at z~0 have been measured down to rather faint luminosity reliably. In this work, we combined the DESI SV3 spectroscopic group central galaxies and the HSC photometric galaxies,...
Morphology is one of the fundamental characteristics of galaxies, yet reproducing it has long been a challenge for semi-analytic models. These models typically overpredict bulge-dominated massive galaxies and disk-dominated low-mass galaxies. I will introduce how we improve the model performance by modifying the bulge formation through galaxy mergers.
The improved approach takes use of the...
