A5002025349- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
Yonsei University
2016-2021
University of California, Davis
2019
In this paper, we introduce the Local Volume TiNy Titans sample (LV-TNT), which is a part of larger body work on interacting dwarf galaxies: TNT . This LV-TNT consists 10 galaxy pairs in Universe (<30 Mpc from Milky Way), span mass ratios M*, 1/M*, 2 < 20, projected separations <100 kpc, and pair member masses log(M*/M⊙) 9.9. All have resolved synthesis maps their neutral hydrogen, are located range environments captured at various interaction stages. enables us to do comparative study...
Abstract We present an improved weak-lensing (WL) study of the high- z ( = 0.87) merging galaxy cluster ACT-CL J0102–4915 (“El Gordo”) based on new wide-field Hubble Space Telescope imaging data. The data cover ∼3.5 × Mpc region centered and enable us to detect WL signals beyond virial radius, which was not possible in previous studies. confirm binary mass structure consisting northwestern (NW) southeastern (SE) subclusters ∼2 σ dissociation between SE peak X-ray cool core. obtain estimates...
SPT-CL J2106-5844 is among the most massive galaxy clusters at z>1 yet discovered. While initially used in cosmological tests to assess compatibility with $\Lambda$CDM cosmology of such a virialized object this redshift, more recent studies indicate undergoing major merger, and not an isolated system singular, well-defined halo. We use sensitive, high spatial resolution measurements from ALMA ACA thermal SZ effect reconstruct pressure distribution intracluster medium system. These are...
We present a detailed high-resolution weak-lensing (WL) study of SPT-CL J2106-5844 at z=1.132, claimed to be the most massive system discovered z > 1 in South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. Based on deep imaging data from Advanced Camera for Surveys and Wide Field 3 on-board Hubble Space Telescope, we find that cluster mass distribution is asymmetric, composed main clump subclump ~640 kpc west thereof. The central further resolved into two smaller northwestern...
We investigate <TEX>$H\small{I}$</TEX> data for a pair of blue compact dwarf galaxies (BCDs), ESO 435-IG20 and 435-IG16, obtained with the Australia Telescope Compact Array. The outer disk is highly disturbed asymmetric in both showing gas tail and/or broad/extended on only one side. Based their low-density surroundings small projected distance (<80 kpc) at similar redshift, we conclude that tidal interaction between these two BCDs responsible morphological kinematical peculiarities...
A fly-by interaction has been suggested to be one of the major explanations for enhanced star formation in blue compact dwarf (BCD) galaxies, yet no direct evidence this scenario found date. In HI Parkes all-sky survey (HIPASS), ESO 435-IG 020 and 435- G 016, a BCD pair were common, extended gas envelope atomic hydrogen, providing an ideal case test hypothesis that starburst BCDs can indeed triggered by interaction. Using high-resolution data from Australia Telescope Compact Array (ATCA), we...