A5071535476- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Porphyrin and Phthalocyanine Chemistry
- Magnetic properties of thin films
- Spectroscopy and Quantum Chemical Studies
- Calibration and Measurement Techniques
- Superconducting and THz Device Technology
- Photochemistry and Electron Transfer Studies
- Magnetism in coordination complexes
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Perovskite Materials and Applications
- Atmospheric Ozone and Climate
- Characterization and Applications of Magnetic Nanoparticles
- Astronomical Observations and Instrumentation
- Organic Electronics and Photovoltaics
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Historical Astronomy and Related Studies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Phase-change materials and chalcogenides
- Advancements in Photolithography Techniques
Winona State University
2023
University of Toledo
2021-2022
Cornell University
2016-2019
University of Vermont
2015
We report the discovery of two companion sources to a strongly lensed galaxy SPT0418-47 ("ring") at redshift 4.225, targeted by JWST Early Release Science program. confirm that these are similar as ring based on H$\alpha$ detected in NIRSpec spectrum, and [C II] 158 $\mu$m line from ALMA. Using multiple spectral lines JWST/NIRSpec, rest-frame optical infrared images NIRCam MIRI, far-infrared (FIR) dust continuum ALMA, we argue newly discovered actually same galaxy, hereafter referred...
We present spatially-, temporally- and polarization-resolved dual photoluminescence/linear dichroism microscopy experiments that investigate the correlation between long-range order nature of exciton states in solution-processed phthalocyanine thin films. The influence grain boundaries disorder is absent these films because typical sizes are 3 orders magnitude larger than focused excitation beam diameters. These reveal existence a delocalized singlet exciton, polarized along high mobility...
Abstract We investigate the properties of interstellar medium, star formation, and current-day stellar population in strongly lensed star-forming galaxy H-ATLAS J091043.1-000321 (SDP.11), at z = 1.7830, using new Herschel Atacama Large Millimeter/submillimeter Array (ALMA) observations far-infrared fine-structure lines carbon, oxygen, nitrogen. report detections [O iii ] 52 μ m, [N 57 i 63 m from Herschel/PACS, present high-resolution imaging [C ii 158 line, underlying continuum, ALMA....
Abstract Accurately determining gas-phase metal abundances within galaxies is critical as metals strongly affect the physics of interstellar medium. To date, vast majority widely used abundance indicators rely on emission from bright optical lines, whose emissivities are highly sensitive to electron temperature. Alternatively, direct-abundance methods exist that measure temperature emitting gas directly, though these usually require challenging observations excited auroral lines. Low-lying...
Abstract The origins of spin exchange in crystalline thin films Copper Octabutoxy Phthalocyanine (Cu-OBPc) are investigated using Magnetic Circular Dichroism (MCD) spectroscopy. These studies made possible by a solution deposition technique which produces highly ordered with macroscopic grain sizes suitable for optical studies. For temperatures lower than 2 K, the contribution specific state valence band manifold originating from hybridized lone pair nitrogen orbitals ring, bears...
We present the detection of four far-infrared fine-structure oxygen lines, as well strong upper limits for CO(2–1) and [N ii] 205 μm in 3C 368, a well-studied radio-loud galaxy at z = 1.131. These new taken conjunction with previously observed neon carbon suggest powerful active galactic nucleus (AGN), accompanied by vigorous extended star formation. A starburst dominated O8 stars, an age ∼6.5 Myr, provides good fit to line data. This estimated makes it nearly concurrent latest episode AGN...
Novel solution-processing deposition techniques in tandem with chemical synthesis design of small-molecule soluble derivatives represent a viable avenue for exploring organic analogues semiconductor alloyed systems, where excitonic properties are tunable through alloy concentration. Here these explored using absorption, grazing incidence X-ray diffraction (GIXRD), and temperature-dependent/time-resolved photoluminescence spectroscopy (TRPL) series crystalline thin film alloys metal-free...
We present detections of the CO(4–3) and [C i] 609 μm spectral lines, as well dust continuum at 480.5 GHz (rest frame), in 3C 368, a Fanaroff–Riley class II (FR-II) galaxy redshift (z) 1.131. 368 has large stellar mass, ∼ 3.6 × 1011 M⊙, is undergoing an episode vigorous star formation, rate 350 M⊙ yr−1, active galactic nucleus activity, with radio-emitting lobes extended over 73 kpc. Our observations allow us to inventory molecular-gas reservoirs by applying three independent methods: (1)...
The Nitrogen-to-Oxygen (N/O) abundance ratio is an important diagnostic of galaxy evolution since the closely tied to growth metallicity and star formation history in galaxies. Estimates for N/O are traditionally accomplished with optical lines that could suffer from extinction excitation effects, so arguably measured better through far-infrared (far-IR) fine-structure lines. Here we show [N III]57$\mu$m/[O III]52$\mu$m line ratio, denoted $N3O3$, a physically robust probe N/O. This...
The origins of indirect spin exchange in crystalline thin films Copper Octabutoxy Phthalocyanine (Cu-OBPc) are investigated using Magnetic Circular Dichroism (MCD) spectroscopy. These studies made possible by a solution deposition technique which produces highly ordered with macroscopic grain sizes suitable for optical studies. For temperatures lower than 2 K, the contribution specific state valence band manifold originating from hybridized lone pair nitrogen orbitals ring, bears...