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To the Edge of M87 and Beyond: Spectroscopy of Intracluster Globular Clusters and Ultra Compact Dwarfs in the Virgo Cluster
Youkyung Ko, Ho Seong Hwang, Myung Gyoon Lee +6
We present the results from a wide-field spectroscopic survey of globular clusters (GCs) in the Virgo Cluster. We obtain spectra for 201 GCs and 55 ultracompact dwarfs (UCDs) using…
Mapping the Polarization of the Radio-Loud Ly Nebula B3 J2330+3927
Chang You, Ann Zabludoff, Paul Smith +6
Lya nebulae, or "Lya blobs", are extended (up to ~100 kpc), bright (L[Lya] > 10^43 erg/s) clouds of Lya emitting gas that tend to lie in overdense regions at z ~ 2--5. The origin o…
The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. IV. Color Dependence and Zero-Point Calibration
In Sung Jang, Myung Gyoon Lee
We present a revised TRGB calibration, accurate to 2.7% of distance. A modified TRGB magnitude corrected for the color dependence of the TRGB, the QT magnitude, is introduced for b…
Globular Clusters, Ultracompact Dwarfs, and Dwarf Galaxies in Abell 2744 at the Redshift of 0.308
Myung Gyoon Lee, In Sung Jang
We report a photometric study of globular clusters (GCs), ultracompact dwarfs (UCDs), and dwarf galaxies in the giant merging galaxy cluster Abell 2744 at z = 0.308. Color-magnitud…
Evidence of Bar-induced Secular Evolution in the Inner Regions of Stellar Discs in Galaxies: What Shapes Disc Galaxies?
Taehyun Kim, Dimitri A. Gadotti, E. Athanassoula +3
We present evidence of bar-induced secular evolution in galactic discs using 3.6 images of nearby galaxies from the Spitzer Survey of Stellar Structure in Galaxies (S4G). We…
Catalogs of Compact Groups of Galaxies from the Enhanced SDSS DR12
Jubee Sohn, Margaret J. Geller, Ho Seong Hwang +2
We apply a friends-of-friends algorithm to an enhanced SDSS DR12 spectroscopic catalog including redshift from literature to construct a catalog of compact groups of g…
Dual Stellar Halos in the Standard Elliptical Galaxy M105 and Formation of Massive Early-Type Galaxies
Myung Gyoon Lee, In Sung Jang
M105 is a standard elliptical galaxy, located in the Leo I Group. We present photometry of the resolved stars in its inner region at R ~ 4' ~ 4Reff, obtained from F606W and F814W i…
Globular Clusters and Spur Clusters in NGC 4921, the Brightest Spiral Galaxy in the Coma Cluster
Myung Gyoon Lee, In Sung Jang
We resolve a significant fraction of globular clusters (GCs) in NGC 4921, the brightest spiral galaxy in Coma. Also we find a number of extended bright star clusters (star complexe…
Compact Groups of Galaxies with Complete Spectroscopic Redshifts in the Local Universe
Jubee Sohn, Ho Seong Hwang, Margaret J. Geller +4
Dynamical analysis of compact groups provides important tests of models of compact group formation and evolution. By compiling 2066 redshifts from FLWO/FAST, from the literature, a…