A5048378363- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Photocathodes and Microchannel Plates
- Astrophysics and Star Formation Studies
- Particle Accelerators and Free-Electron Lasers
- Diamond and Carbon-based Materials Research
- CCD and CMOS Imaging Sensors
- Metal and Thin Film Mechanics
- Astrophysical Phenomena and Observations
- Ion-surface interactions and analysis
- Radio Astronomy Observations and Technology
The University of Texas at Austin
2023-2024
Pennsylvania State University
1997-2021
Abstract We present the first publicly released catalog of sources obtained from Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral field spectroscopic survey designed to measure Hubble expansion parameter and angular diameter distance at 1.88 < z 3.52 by using spatial distribution more than a million Ly α -emitting galaxies over total target area 540 deg 2 . The comes contiguous fiber spectra coverage 25 sky 2017 January through 2020 June, where object...
Abstract We present measurements of z ∼ 2.4 ultraviolet (UV) background light using Ly α absorption from galaxies at 2–3 in the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) database. Thanks to wide area this survey, we also measure variability across sky. The data suggest an asymmetric geometry where integrated UV is absorbed by H i within halo a foreground galaxy, configuration similar damped systems. Using stacking analyses over 400,000 HETDEX LAE spectra, argue that detectable...
Abstract We present MCSED , a new spectral energy distribution (SED) fitting code that mates flexible stellar evolution calculations with the Markov Chain Monte Carlo algorithms of software package emcee . It takes broad-, intermediate-, and narrowband photometry, emission-line fluxes, and/or absorption-line indices returns probability distributions covariance plots for all model parameters. includes variety dust attenuation curves parameters varying UV slopes bump strengths, prescription...
Abstract In this work, we measure the Ly α escape fraction of 935 [O iii ]-emitting galaxies between 1.9 < z 2.35 by comparing stacked spectra from Hubble Space Telescope/WFC3's near-IR grism to corresponding stacks Hobby–Eberly Telescope Dark Energy Experiment’s Internal Data Release 2. By measuring stacks’ H β ratios, determine as a function stellar mass, star-formation rate, internal reddening, size, and ]/H ratio. We show that correlates with number parameters, such galaxy nebular...
Abstract The Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) is designed to detect and measure the redshifts of more than 1 million Ly α emitting galaxies (LAEs) 1.88 < z 3.52. In addition its cosmological measurements, these data enable studies spectral profiles underlying radiative transfer. Using roughly half a LAEs in HETDEX Data Release 3, we stack various subsets obtain typical profile for ∼ 2–3 epoch understand their physical properties. We find clear absorption wings around...
Abstract Euclid , the Wide Field Infrared Survey Telescope and Hobby-Eberly Dark Energy Experiment (HETDEX) will make emission-line selected galaxies largest observed constituent in z > 1 universe. However, we only have a limited understanding of physical properties via their Ly α or rest-frame optical emission lines. To address this problem, present basic ∼2000 All-Wavelength Extended Groth Strip International Survey, Cosmological Evolution Great Observatories Origins Deep Survey-North,...
Abstract We describe the ensemble properties of 1.9 < z 3.5 Lyman alpha emitters (LAEs) found in HETDEX survey’s first public data release, Public Source Catalog 1. Stacking low-resolution ( R ∼ 800) spectra greatly increases signal-to-noise ratio (S/N), revealing spectral features otherwise hidden by noise, and we show that stacked spectrum is representative an average member set. The flux-limited, Ly α S/N restricted stack 50,000 LAEs shows biweight 2.6 LAE to be a blue (UV continuum...
Upcoming missions such as Euclid and the Nancy Grace Roman Space Telescope (Roman) will use emission-line selected galaxies to address a variety of questions in cosmology galaxy evolution $z>1$ universe. The optimal observing strategy for these programs relies upon knowing number that be found bias population. Here we measure $\rm{[O\ III]}\ \lambda 5007$ luminosity function vetted sample 1951 $m_{\rm J+JH+H} < 26$ with unambiguous redshifts between $1.90 z 2.35$, which were using HST/WFC3...
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is designed to detect and measure the redshifts of more than one million Ly$\alpha$ emitting galaxies (LAEs) between $1.88 < z 3.52$. In addition its cosmological measurements, these data enable studies spectral profiles underlying radiative transfer. Using roughly half a LAEs in HETDEX Data Release 3, we stack various subsets obtain typical profile for $z \sim 2-3$ epoch understand their physical properties. We find clear absorption...
We describe the ensemble properties of $1.9 < z 3.5$ Lyman Alpha Emitters (LAEs) found in HETDEX survey's first public data release, Public Source Catalog 1 (Mentuch Cooper et al. 2023). Stacking low-resolution ($R \sim$ 800) spectra greatly increases signal-to-noise ratio, revealing spectral features otherwise hidden by noise, and we show that stacked spectrum is representative an average member set. The flux limited, Ly$\alpha$ ratio restricted stack 50K LAEs shows biweight ``average" $z...
We present the first publicly released catalog of sources obtained from Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral field spectroscopic survey designed to measure Hubble expansion parameter and angular diameter distance at 1.88
ElectronJield emission tests have been performed onJilms grown by a modiied microwave plasma assisted chemical vapor depm ition diumond process. This modificution includes the addition of N2 and 02 during growth stage. Characterization these films shows presence disordered tetrahedral carbon structure. Raman spectroscopy indicates disturbance in cubic symmetry lattice andX-ray diffraction Field testing indicate that current densities 0. 5mA/cm2 can be obtainedfor applied,fields 5-8 V/pm. The...