62 citations · 464 across the 19 of their papers we have counts for
19 papers
Galaxy populations in protoclusters at cosmic noon
Moira Andrews, M. Celeste Artale, Ankit Kumar +20
We investigate the physical properties and redshift evolution of simulated galaxies residing in protoclusters at cosmic noon, to understand the influence of the environment on gala…
Lyman-Alpha Escape from Low-Mass, Compact, High-Redshift Galaxies
Ragadeepika Pucha, Naveen A. Reddy, Arjun Dey +5
We investigate the effects of stellar populations and sizes on Ly escape in 27 spectroscopically confirmed and 35 photometric Lyman-Alpha Emitters (LAEs) at z 2.65 in…
Constraining Cosmology with Big Data Statistics of Cosmological Graphs
Sungryong Hong, Donghui Jeong, Ho Seong Hwang +7
By utilizing large-scale graph analytic tools implemented in the modern Big Data platform, Apache Spark, we investigate the topological structure of gravitational clustering in fiv…
Statistics of Two-point Correlation and Network Topology for Lyman Alpha Emitters at
Sungryong Hong, Arjun Dey, Kyung-Soo Lee +9
We investigate the spatial distribution of Lyman alpha emitting galaxies (LAEs) at , selected from the NOAO Deep Wide-Field Survey (NDWFS), using two-point statisti…
A census of galaxy constituents in a Coma Progenitor observed at z>3
Ke Shi, Kyoung-Soo Lee, Arjun Dey +15
We present a detailed census of galaxies in and around PC217.96+32.3, a spectroscopically confirmed Coma analog at z=3.78. Diverse galaxy types identified in the field include Lya…
Discovery of a Very Large (~20 kpc) Galaxy at z=3.72
Kyoung-Soo Lee, Arjun Dey, Thomas Matheson +12
We report the discovery and spectroscopic confirmation of a very large star-forming Lyman Break galaxy, G6025, at z_spec=3.721+/-0.003. In the rest-frame ~2100A, G6025 subtends ~24…
The Diversity of Diffuse Ly Nebulae around Star-Forming Galaxies at High Redshift
Rui Xue, Kyoung-Soo Lee, Arjun Dey +6
We report the detection of diffuse Ly emission, or Ly halos (LAHs), around star-forming galaxies at and in the NOAO Deep Wide-Field Survey Boötes field.…
Spectroscopic Confirmation of a Protocluster at z=3.786
Arjun Dey, Kyoung-Soo Lee, Naveen Reddy +5
We present new observations of the field containing the z=3.786 protocluster, PC217.96+32.3. We confirm that it is one of the largest and most overdense high-redshift structures kn…
The Network Behind the Cosmic Web
B. C. Coutinho, Sungryong Hong, Kim Albrecht +5
The concept of the cosmic web, viewing the Universe as a set of discrete galaxies held together by gravity, is deeply engrained in cosmology. Yet, little is known about the most ef…
Discriminating Topology in Galaxy Distributions using Network Analysis
Sungryong Hong, Bruno Coutinho, Arjun Dey +4
(abridged) The large-scale distribution of galaxies is generally analyzed using the two-point correlation function. However, this statistic does not capture the topology of the dis…
Network Analysis of Cosmic Structures : Network Centrality and Topological Environment
Sungryong Hong, Arjun Dey
We apply simple analyses techniques developed for the study of complex networks to the study of the cosmic web, the large scale galaxy distribution. In this paper, we measure three…
Discovery of a Very Large Structure at Z=3.78
Kyoung-Soo Lee, Arjun Dey, Sungryong Hong +5
We report the discovery of a large-scale structure containing multiple protoclusters at z=3.78 in the Boötes field. The spectroscopic discovery of five galaxies at z=3.783+/-0.002…
Extinction and Dust Geometry in M83 HII Regions: A Hubble Space Telescope/WFC3 Study
Guilin Liu, Daniela Calzetti, Sungryong Hong +7
We present HST/WFC3 narrow-band imaging of the starburst galaxy M83 targeting the hydrogen recombination lines (H, H and Pa), which we use to investigate the dust extincti…
On the Automated and Objective Detection of Emission Lines in Faint-Object Spectroscopy
Sungryong Hong, Arjun Dey, Moire K. M. Prescott
Modern spectroscopic surveys produce large spectroscopic databases, generally with sizes well beyond the scope of manual investigation. The need arises, therefore, for an automated…
Quantitative Method for the Optimal Subtraction of Continuum Emission from Narrow-band Images : Skewness Transition Analysis
Sungryong Hong, Daniela Calzetti, Mark Dickinson
We present an objective method to remove the stellar continuum emission from narrow-band images to derive emission-line images. The method is based on the skewness of the pixel his…
Constraining Stellar Feedback: Shock-ionized Gas in Nearby Starburst Galaxies
Sungryong Hong, Daniela Calzetti, John S. Gallagher +3
(abridged) We investigate the properties of feedback-driven shocks in 8 nearby starburst galaxies using narrow-band imaging data from the Hubble Space Telescope (HST). We identify…
Large-scale shock-ionized and photo-ionized gas in M83: the impact of star formation
Sungryong Hong, Daniela Calzetti, Michael A. Dopita +20
We investigate the ionization structure of the nebular gas in M83 using the line diagnostic diagram, [O III](5007 \degA)/Hβ vs. [S II](6716 °A+6731 °A)/Hα with the newly available…
Spitzer 70~m Emission as a SFR Indicator for Sub--Galactic Regions
Yiming Li, Daniela Calzetti, Robert C. Kennicutt +4
We use Spitzer 24 m, 70 m and ground based H data for a sample of 40 SINGS galaxies to establish a star formation rate (SFR) indicator using 70 m emission for sub--gala…
Galactic outflows and the kinematics of damped Lyman alpha absorbers
Sungryong Hong, Neal Katz, Romeel Davé +3
The kinematics of damped Lyman alpha absorbers (DLAs) are difficult to reproduce in hierarchical galaxy formation models, particularly the preponderance of wide systems. We investi…