Anthony H. Gonzalez
A5090080680- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Astro and Planetary Science
- CCD and CMOS Imaging Sensors
- Remote Sensing in Agriculture
- Geophysics and Gravity Measurements
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Poxvirus research and outbreaks
- Optical Polarization and Ellipsometry
- Atomic and Subatomic Physics Research
- Solar and Space Plasma Dynamics
- RNA Interference and Gene Delivery
University of Florida
2015-2024
California State University, Dominguez Hills
2024
University College London
2024
University of Copenhagen
2024
Flatiron Health (United States)
2024
Flatiron Institute
2024
Royal Holloway University of London
2024
University of California, Davis
2024
New York University
2024
Princeton University
2024
We present new weak-lensing observations of 1E 0657-558 (z = 0.296), a unique cluster merger, that enable direct detection dark matter, independent assumptions regarding the nature gravitational force law. Due to collision two clusters, dissipationless stellar component and fluid-like X-ray-emitting plasma are spatially segregated. By using both wide-field ground-based images HST/ACS cores, we create lensing maps showing potential does not trace distribution, dominant baryonic mass...
We present Advanced Camera for Surveys, NICMOS, and Keck adaptive-optics-assisted photometry of 20 Type Ia supernovae (SNe Ia) from the Hubble Space Telescope (HST) Cluster Supernova Survey. The SNe were discovered over redshift interval 0.623 < z 1.415. Of these Ia, 14 pass our strict selection cuts are used in combination with world's sample to derive best current constraints on dark energy. new 10 beyond = 1, thereby nearly doubling statistical weight HST-discovered this redshift. Our...
We compare new maps of the hot gas, dark matter, and galaxies for 1E 0657-56, a cluster with rare high-velocity merger occurring nearly in plane sky. The X-ray observations reveal bullet-like gas subcluster just exiting collision site. A prominent bow shock gives an estimate velocity, 4500 km s-1, which lies mostly optical image shows that lags behind galaxies. weak-lensing mass map reveals matter clump lying ahead collisional bullet but coincident effectively collisionless From these...
We compare recent results from X-ray, strong lensing, weak and optical observations with numerical simulations of the merging galaxy cluster 1E 0657–56. X-ray reveal a bullet-like subcluster prominent bow shock, which gives an estimate for merger velocity 4700 km s−1, while lensing show that positions total mass peaks are consistent centroids collisionless galaxies (and inconsistent brightness peaks). Previous studies, based on older observational data sets, have placed upper limits...
We present a catalog of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect signature from 2500 deg$^2$ South Pole Telescope (SPT) data. This work represents the complete sample detected at high significance in 2500-square-degree SPT-SZ survey, which was completed 2011. A total 677 (409) cluster candidates are identified above signal-to-noise threshold $\xi$ =4.5 (5.0). Ground- and space-based optical near-infrared (NIR) imaging confirms overdensities similarly colored galaxies...
We present a weak-lensing mass reconstruction of the interacting cluster 1E 0657-558, in which we detect both main and subcluster. The subcluster is identified as smaller that has just undergone initial infall pass-through primary been previously optical surveys X-ray studies. gas separated from galaxies by ram pressure-stripping during pass-through. detected peak located between galaxy concentration, although position consistent with centroid within errors reconstruction. find for good...
The Chandra image of the merging, hot galaxy cluster 1E 0657-56 reveals a bow shock propagating in front bullet-like gas cloud just exiting disrupted core. This is first clear example cluster. From jumps density and temperature at shock, Mach number 2-3. corresponds to velocity 3000-4000 km s-1 relative main cluster, which means that traversed core 0.1-0.2 Gyr ago. 6-7 keV "bullet" appears be remnant dense cooling flow region once located center merging subcluster whose outer has been...
We determine the contribution of stars in galaxies, intracluster stars, and medium to total baryon budget nearby galaxy clusters groups. find that mass fraction (f_b) within r500 is constant for systems with M500 between 6e13 1e15 Msun. Although f_b lower than WMAP value, shortfall on order both observational systematic uncertainties depletion baryons predicted by simulations. The data therefore provide no compelling evidence undetected baryonic components, particularly any vary importance...
We present a set of low resolution empirical SED templates for AGNs and galaxies in the wavelength range from 0.03 to 30 microns based on multi-wavelength photometric observations NOAO Deep-Wide Field Survey Bootes field spectroscopic AGN Galaxy Evolution Survey. Our training sample is comprised 14448 redshift 0<~z<~1 5347 likely 0<~z<~5.58. use our determine redshifts AGNs. While they are relatively accurate galaxies, their accuracies strong function luminosity ratio between galaxy...
Using the Atacama Large Millimeter/submillimeter Array, we have conducted a blind redshift survey in 3 mm atmospheric transmission window for 26 strongly lensed dusty star-forming galaxies (DSFGs) selected with South Pole Telescope. The sources were to S1.4 > 20 mJy and dust-like spectrum and, remove low-z sources, not bright radio (S843 MHz < 6 mJy) or far-infrared counterparts (S100 μm 1 Jy, S60 200 mJy). We robustly detect 44 line features our survey, which identify as redshifted emission...
(abridged) We present cosmological constraints obtained from galaxy clusters identified by their Sunyaev-Zel'dovich effect signature in the 2500 square degree South Pole Telescope Sunyaev Zel'dovich survey. consider 377 cluster candidates at z>0.25 with a detection significance greater than five, corresponding to 95% purity threshold for compute on models using measured abundance as function of mass and redshift. include additional multi-wavelength observations, including Chandra X-ray data...
We present a catalog of galaxy cluster candidates, selected through their Sunyaev–Zel'dovich (SZ) effect signature in the first 720 deg2 South Pole Telescope (SPT) survey. This area was mapped with SPT 2008 and 2009 austral winters to depth ∼18 μKCMB-arcmin at 150 GHz; 550 it also ∼44 95 GHz. Based on optical imaging all 224 candidates near-infrared majority we have found and/or infrared counterparts for 158, which then classify as confirmed clusters. Of these 158 clusters, 135 were...
Monkeypox is a viral zoonotic disease endemic in Central and West Africa. In May 2022, dozens of non-endemic countries reported hundreds monkeypox cases, most with no epidemiological link to We identified two lineages virus (MPXV) among 2021 seven 2022 US cases: the major outbreak variant called B.1 minor contemporaneously sampled A.2. Analyses mutations these variants revealed an extreme preference for GA-to-AA indicative human APOBEC3 cytosine deaminase activity Clade IIb MPXV (previously...
The CatWISE2020 Catalog consists of 1,890,715,640 sources over the entire sky selected from WISE and NEOWISE survey data at 3.4 4.6 $\mu$m (W1 W2) collected 2010 Jan. 7 to 2018 Dec. 13. This dataset adds two years that used for CatWISE Preliminary (Eisenhardt et al., 2020), bringing total six times as many exposures spanning sixteen large a time baseline AllWISE catalog. other major change is detection list was generated using ${\it crowdsource}$ (Schlafly al. 2019), while software AllWISE....
We use measurements from the South Pole Telescope (SPT) Sunyaev Zel'dovich (SZ) cluster survey in combination with X-ray to constrain cosmological parameters. present a statistical method that fits for scaling relations of SZ and observables mass while jointly fitting cosmology. The is generalizable multiple observables, self-consistently accounts effects selection uncertainties calibration on derived constraints. apply this data set consisting an SZ-selected catalog 18 galaxy clusters at z...
The South Pole Telescope has discovered one hundred gravitationally lensed, high-redshift, dusty, star-forming galaxies (DSFGs). We present 0.5" resolution 870um Atacama Large Millimeter/submillimeter Array imaging of a sample 47 DSFGs spanning z=1.9-5.7, and construct gravitational lens models these sources. Our visibility-based modeling incorporates several sources residual interferometric calibration uncertainty, allowing us to properly account for noise in the observations. At least 70%...
The Euclid ERO showcase Euclid's capabilities in advance of its main mission by targeting 17 astronomical objects, including galaxy clusters, nearby galaxies, globular and star-forming regions. A total 24 hours observing time was allocated the early months operation, scientific community engaged through an public data release. We describe development pipeline to create visually compelling images while simultaneously meeting demands within launch leveraging a pragmatic data-driven strategy....
We present a detailed analysis of the surface brightness distribution brightest cluster galaxy (BCG) in each 24 clusters at 0.03<z<0.13. use two-dimensional profile fitting to model out r=300 kpc for BCG, comparing r^{1/4}, r^{1/n}, and double r^{1/4} models. obtain statistically superior fits using two component consisting pair profiles with independent scale lengths, ellipticities, orientations. The can simply reproduce observed position angle ellipticity gradients, which cannot generally...
We have identified 335 galaxy cluster and group candidates, 106 of which are at z > 1, using a 4.5 um selected sample objects from 7.25 deg^2 region in the Spitzer Infrared Array Camera (IRAC) Shallow Survey. Clusters were as 3-dimensional overdensities wavelet algorithm, based on photometric redshift probability distributions derived IRAC NOAO Deep Wide-Field Survey data. estimate only ~10% detections spurious. To date 12 1 candidates been confirmed spectroscopically, redshifts 1.06 to...
The galaxy cluster 1E0657-56 (z = 0.296) is remarkably well-suited for addressing outstanding issues in both evolution and fundamental physics. We present a reconstruction of the mass distribution from strong weak gravitational lensing data. Multi-color, high-resolution HST ACS images allow detection many more arc candidates than were previously known, especially around subcluster. Using known redshift one multiply imaged systems, we determine remaining source redshifts using predictive...
The South Pole Telescope (SPT) is currently surveying 2500 deg^2 of the southern sky to detect massive galaxy clusters out epoch their formation using Sunyaev-Zel'dovich (SZ) effect. This paper presents a catalog 26 most significant SZ cluster detections in full survey region. includes 14 which have been previously identified and 12 that are new discoveries. These were fields observed two differing noise depths: 1500 at final SPT depth 18 uK-arcmin 150 GHz, 1000 54 uK-arcmin. Clusters...