25 citations · 144 across the 13 of their papers we have counts for
7 papers · 1 filter
Merger Tree-based Galaxy Matching: A Comparative Study Across Different Resolutions
Minyong Jung, Ji-hoon Kim, Boon Kiat Oh +3
We introduce a novel halo/galaxy matching technique between two cosmological simulations with different resolutions, which utilizes the positions and masses of halos along their su…
Final parsec problem of black hole mergers and ultralight dark matter
Hyeonmo Koo, Dongsu Bak, Inkyu Park +2
When two galaxies merge, they often produce a supermassive black hole binary (SMBHB) at their center. Numerical simulations with stars and cold dark matter show that SMBHBs typical…
The effects of non-linearity on the growth rate constraint from velocity correlation functions
Motonari Tonegawa, Stephen Appleby, Changbom Park +2
The two-point statistics of the cosmic velocity field, measured from galaxy peculiar velocity (PV) surveys, can be used as a dynamical probe to constrain the growth rate of large-s…
Cluster-counterpart Voids: Void Identification from Galaxy Density Field
Junsup Shim, Changbom Park, Juhan Kim +1
We identify cosmic voids from galaxy density fields under the theory of void-cluster correspondence. We extend the previous novel void-identification method developed for the matte…
Cosmological Parameter Constraints from the SDSS Density and Momentum Power Spectra
Stephen Appleby, Motonari Tonegawa, Changbom Park +3
We extract the galaxy density and momentum power spectra from a subset of early-type galaxies in the SDSS DR7 main galaxy catalog. Using galaxy distance information inferred from t…
Tomographic Alcock-Paczynski Test with Redshift-Space Correlation Function: Evidence for the Dark Energy Equation of State Parameter w>-1
Fuyu Dong, Changbom Park, Sungwook E. Hong +4
The apparent shape of galaxy clustering depends on the adopted cosmology used to convert observed redshift to comoving distance, the relation, as it changes the line element…