A5035523895- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- History and Developments in Astronomy
- Calibration and Measurement Techniques
- Astrophysics and Star Formation Studies
University of Missouri–Kansas City
2015-2022
We present the Massive and Distant Clusters of WISE Survey (MaDCoWS), a search for galaxy clusters at 0.7<z<1.5 based upon data from Wide-field Infrared Explorer (WISE) mission. MaDCoWS is first cluster survey capable discovering massive these redshifts over full extragalactic sky. The divided into two regions -- region sky covered by Pan-STARRS (Dec>-30 degrees) remainder southern Dec<-30 degrees which shallower optical SuperCOSMOS Sky are available. In this paper we describe algorithm,...
Abstract We present an analysis of the cluster X-ray morphology and active galactic nucleus (AGN) activity in nine z ∼ 1 galaxy clusters from Massive Distant Clusters WISE Survey observed with Chandra. Using photon asymmetry ( A phot ) to quantify morphologies, we find evidence that four most dynamically disturbed are likely be mergers. Employing a luminosity cut 7.6 × 10 42 erg s −1 identify AGNs 0.7–7.0 keV region, show majority these host excess compared local field. use model cumulative...
We present confirmation of the cluster MOO J1142+1527, a massive galaxy discovered as part Massive and Distant Clusters WISE Survey. The is confirmed to lie at z = 1.19, using Combined Array for Research in Millimeter-wave Astronomy we robustly detect Sunyaev–Zel'dovich (SZ) decrement 13.2σ. SZ data imply mass M200m (1.1 ± 0.2) × 1015M⊙, making J1142+1527 most known > 1.15 second 1. For standard ΛCDM cosmology it further expected be one ∼5 clusters exist ≥ 1.19 over entire sky. Our ongoing...
We present CARMA 30 GHz Sunyaev-Zel'dovich (SZ) observations of five high-redshift ($z \gtrsim 1$), infrared-selected galaxy clusters discovered as part the all-sky Massive and Distant Clusters WISE Survey (MaDCoWS). The SZ decrements measured toward these demonstrate that MaDCoWS selection is discovering evolved, massive with hot intracluster gas. Using scaling relation calibrated South Pole Telescope at similar masses redshifts, we find have in range $M_{200} \approx 2-6 \times 10^{14}$...
We present an analysis of the radial distribution Active Galactic Nuclei (AGN) in $2300$ galaxy clusters from Massive and Distant Clusters {\it WISE} Survey (MaDCoWS). MaDCoWS provides largest coverage extragalactic sky for a cluster sample at $z\sim1$. use literature catalogs AGN selected via optical, mid-infrared (MIR), radio data, by optical-to-MIR (OIR) color. Stacking within $6\arcmin$ centers clusters, we find distinct overdensity $1\arcmin$ center all selection methods. The fraction...
The characterization of the Intra-Cluster Medium (ICM) properties high-redshift galaxy clusters is fundamental to our understanding large-scale structure formation processes. We present results a multi-wavelength analysis very massive cluster MOO J1142$+$1527 at redshift $z = 1.2$ discovered as part Massive and Distant Clusters WISE Survey (MaDCoWS). This based on high angular resolution $Chandra$ X-ray NIKA2 Sunyaev-Zel'dovich (SZ) data. Although data have only about 1700 counts, we are...
Abstract We present 190 galaxy cluster candidates (most at high redshift) based on overdensity measurements in the Spitzer /IRAC imaging of fields surrounding 646 bent, double-lobed radio sources drawn from Clusters Occupied by Bent Radio AGN (COBRA) Survey. The COBRA were chosen as objects Very Large Array FIRST survey that lack optical counterparts Sloan Digital Sky Survey to a limit m r = 22, making them likely lie redshift. This is confirmed our observations: redshift distribution with...
The Massive and Distant Clusters of WISE Survey (MaDCoWS) provides a catalog high-redshift ($0.7\lesssim z\lesssim 1.5$) infrared-selected galaxy clusters. However, the verification ionized intracluster medium, indicative collapsed nearly virialized system, is made challenging by high redshifts sample members. main goal this work to test capabilities Atacama Compact Array (ACA; also known as Morita Array) Band 3 observations, centered at about 97.5 GHz, provide robust validation cluster...
Abstract We present a multiwavelength investigation of the radio galaxy population in cluster MOO J1506+5137 at z = 1.09 ± 0.03, which previous work we identified as having multiple complex sources. The combined data set used this includes from Low-Frequency Array Two-meter Sky Survey, NSF’s Karl G. Jansky Very Large Array, Robert C. Byrd Green Bank Telescope, Spitzer Space and Dark Energy Camera Legacy Survey. find that there are five sources, all located within 500 kpc (∼1′) center have...
We present the results from a study with NSF's Karl G. Jansky Very Large Array (VLA) to determine radio morphologies of extended sources and properties their host galaxies in 50 massive galaxy clusters at z~1. find majority be Fanaroff-Riley (FR) type IIs. By analyzing infrared counterparts sources, we that ~40% are candidate brightest cluster (BCG) ~83% consistent being one top six most cluster. investigate role environmental factors on radio-loud AGN population by examining correlations...
Abstract We present the results from a pilot study with Karl G. Jansky Very Large Array to determine radio morphologies of extended sources and properties their host-galaxies in 10 massive galaxy clusters at z ∼ 1, an epoch which are assembling rapidly. These drawn parent sample WISE -selected that were cross-correlated VLA Faint Images Radio Sky Twenty-Centimeters survey identify within 1′ cluster centers. Out targeted sources, 6 FR II 1 is I source, 3 have undetermined morphologies. Eight...
The properties of galaxy clusters as a function redshift can be utilized an important cosmological tool. We present initial results from program follow-up observations the Sunyaev-Zeldovich effect (SZE) in high detected at infrared wavelengths Massive and Distant Clusters WISE Survey (MaDCoWS). Using typical on-source integration times 3-4 hours per cluster, MUSTANG2 on Green Bank Telescope was able to measure strong detections SZE decrements statistically significant masses 14 out 16...
We present a study of the central radio activity galaxy clusters at high redshift. Using large sample $0.7<z<1.5$ from Massive and Distant Clusters {\it WISE} Survey Faint Images Radio Sky Twenty-Centimeters $1.4$~GHz catalog, we measure fraction containing source within $500$~kpc, which term cluster radio-active fraction, galaxies $500$~kpc exhibiting emission. find tentative ($2.25\sigma$) evidence that increases with richness, while are radio-luminous...
We present measurements of the stellar mass fractions ($f_\star$) for a sample high-redshift ($0.93 \le z 1.32$) infrared-selected galaxy clusters from Massive and Distant Clusters WISE Survey (MaDCoWS) compare them to Sunyaev-Zel'dovich (SZ) effect-selected in similar redshift range South Pole Telescope (SPT)-SZ Survey. do not find significant difference mean $f_\star$ between two selection methods, though we an unexpectedly large SZ-selected clusters. In addition, measure luminosity...
We present stellar mass fractions and composite luminosity functions (LFs) for a sample of \Ncl\ clusters from the Massive Distant Clusters WISE Survey (MaDCoWS) at redshift range $0.951 \leq z 1.43$. Using SED fitting optical deep mid-infrared photometry, we establish membership objects along lines-of-sight to these calculate masses member galaxies. find largely consistent with previous works, including appearing display negative correlation total cluster mass. measure $3.6~\mathrm{\mu m}$...
We present the results of analysis very massive cluster MOO J1142+1527 at a redshift z = 1.2 based on high angular resolution NIKA2 Sunyaev-Zel’dovich (SZ) and Chandra X-ray data. This multi-wavelength enables us to estimate shape temperature profile with unprecedented precision this obtain map gas entropy distribution averaged along line sight. The comparison between morphological properties observed in maps together allows conclude that MOOJ1142+1527 is an on-going merger hosting cool-core...