Zobrazeno 1 - 10
of 525
pro vyhledávání: '"Hong Sungwook"'
Autor:
Hong, Sungwook E., Park, Changbom, Mishra, Preetish K., Kim, Juhan, Gibson, Brad K., Kim, Yonghwi, Few, C. Gareth, Pichon, Christophe, Shin, Jihye, Lee, Jaehyun
We investigate when and how the relations of galaxy morphology and star forming activity with clustercentric radius become evident in galaxy clusters. We identify 162 galaxy clusters with total mass $M_{\rm tot}^{\rm cl} > 5 \times 10^{13} {\rm M}_\o
Externí odkaz:
http://arxiv.org/abs/2411.08255
Traditional weak-lensing mass reconstruction techniques suffer from various artifacts, including noise amplification and the mass-sheet degeneracy. In Hong et al. (2021), we demonstrated that many of these pitfalls of traditional mass reconstruction
Externí odkaz:
http://arxiv.org/abs/2410.19907
Autor:
Rowntree, Aaron R., Singh, Ankit, Vincenzo, Fiorenzo, Gibson, Brad K., Gouin, Céline, Galárraga-Espinosa, Daniela, Lee, Jaehyun, Kim, Juhan, Laigle, Clotilde, Park, Changbom, Pichon, Christophe, Few, Gareth, Hong, Sungwook E., Kim, Yonghwi
Metallicity offers a unique window into the baryonic history of the cosmos, being instrumental in probing evolutionary processes in galaxies between different cosmic environments. We aim to quantify the contribution of these environments to the scatt
Externí odkaz:
http://arxiv.org/abs/2404.10055
Publikováno v:
ApJ 965 156 (2024)
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 subhalo merger tree. With this tool, we conduct a study of resolution bi
Externí odkaz:
http://arxiv.org/abs/2312.02466
Publikováno v:
Physics Letters B Volume 856 , 138908 (2024)
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 typically stall out at a distance of a few parsecs apart and take billions of
Externí odkaz:
http://arxiv.org/abs/2311.03412
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-scale structures in the universe. Most works use the statistics on scal
Externí odkaz:
http://arxiv.org/abs/2309.14457
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 matter density field to the galaxy density field for practical applications
Externí odkaz:
http://arxiv.org/abs/2305.09888
Autor:
Appleby, Stephen, Tonegawa, Motonari, Park, Changbom, Hong, Sungwook E., Kim, Juhan, Yoon, Yongmin
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 the improved fundamental plane described in \citet{Yoon_2020}, we recon
Externí odkaz:
http://arxiv.org/abs/2305.01943
Autor:
Dong, Fuyu, Park, Changbom, Hong, Sungwook E., Kim, Juhan, Hwang, Ho Seong, Park, Hyunbae, Appleby, Stephen
The apparent shape of galaxy clustering depends on the adopted cosmology used to convert observed redshift to comoving distance, the $r(z)$ relation, as it changes the line elements along and across the line of sight differently. The Alcock-Paczy\'ns
Externí odkaz:
http://arxiv.org/abs/2305.00206
We present a novel approach for estimating cosmological parameters, $\Omega_m$, $\sigma_8$, $w_0$, and one derived parameter, $S_8$, from 3D lightcone data of dark matter halos in redshift space covering a sky area of $40^\circ \times 40^\circ$ and r
Externí odkaz:
http://arxiv.org/abs/2304.08192