A5021639383- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Environmental remediation with nanomaterials
- Ammonia Synthesis and Nitrogen Reduction
- Muon and positron interactions and applications
- nanoparticles nucleation surface interactions
- Ion-surface interactions and analysis
- Cardiac Arrest and Resuscitation
- Trauma Management and Diagnosis
- History and Developments in Astronomy
- Advanced Data Storage Technologies
- Graphene research and applications
- Spacecraft Design and Technology
- Radiation Effects in Electronics
- Advanced Chemical Physics Studies
- Electrocatalysts for Energy Conversion
- Graphite, nuclear technology, radiation studies
- Nuclear Physics and Applications
Northwestern University
2020-2022
Portland State University
2017-2019
Division of Undergraduate Education
2018
Time domain science has undergone a revolution over the past decade, with tens of thousands new supernovae (SNe) discovered each year. However, several observational domains, including SNe within days or hours explosion and faint, red transients, are just beginning to be explored. Here, we present Young Supernova Experiment (YSE), novel optical time-domain survey on Pan-STARRS telescopes. Our is designed obtain well-sampled $griz$ light curves for transient events up $z \approx 0.2$. This...
Abstract We present panchromatic observations and modeling of the Calcium-rich supernova (SN) 2019ehk in star-forming galaxy M100 ( d ≈ 16.2 Mpc) starting 10 hr after explosion continuing for ∼300 days. SN shows a double-peaked optical light curve peaking at t = 3 15 The first peak is coincident with luminous, rapidly decaying Swift-XRT–discovered X-ray emission <?CDATA ${L}_{{\rm{x}}}\approx {10}^{41}\,\mathrm{erg}\,{{\rm{s}}}^{-1}$?> days; L x ∝ −3 ), Shane/Kast spectral detection narrow H...
We present extensive multi-frequency VLA and VLBA observations of the radio-bright supernova (SN) IIb SN 2004C that span $\sim(40-2793)$ days post-explosion. interpret temporal evolution radio spectral energy distribution (SED) in context synchrotron self-absorbed (SSA) emission from explosion's forward shock as it expands circumstellar medium (CSM) previously sculpted by mass-loss history stellar progenitor. modeling data point to a blastwave with average velocity $\sim0.06c$ carries an...
We present multi-band ATLAS photometry for SN 2019tsf, a stripped-envelope Type Ib supernova (SESN). The shows triple-peaked light curve and late (re-)brightening, making it unique among systems. re-brightening observations represent the latest photometric measurements of multi-peaked to date. As late-time spectroscopy suggest no hydrogen, potential circumstellar material (CSM) must be H-poor. Moreover, (>150 days) spectra show signs narrow emission lines, further disfavouring CSM...
Journal Article Effect of Synthesis Temperature on the Formation GAC supported Pd and Au NPs Get access Kavita Meduri, Meduri Department Mechanical & Materials Engineering, Portland State University, Portland, OR, USA Search for other works by this author on: Oxford Academic Google Scholar Candice Stauffer, Stauffer Physics, Thomas Lindner, Lindner Graham O'Brien Johnson, Johnson Institute Environmental Health, Oregon Health Science Paul G Tratnyek, Tratnyek Jun Jiao USADepartment Microscopy...
Abstract Adding Au to Pd nanoparticles (NPs) can impart high catalytic activity with respect hydrogenation of a wide range substances. These materials are often synthesized by reducing metallic precursors; hence, sonochemical and solvothermal processes commonly used anchor these bimetals onto thin supports, including graphene. Although similar NPs have been studied reasonably well, clear understanding structural characteristics relative their synthesis parameters is lacking, due limitations...
ABSTRACT We present X-ray and radio observations of what may be the closest Type Iax supernova (SN) to date, SN 2014dt (d = 12.3–19.3 Mpc), provide tight constraints on emission. infer a specific luminosity $L_R\lt (1.0\!-\!2.4)\times 10^{25}\, \rm {erg\, s^{-1}\, Hz^{-1}}$ at frequency 7.5 GHz $L_X\lt 1.4\times 10^{38}\, s^{-1}}$ (0.3–10 keV) ∼38–48 d post-explosion. interpret these limits in context Inverse Compton (IC) emission synchrotron from population electrons accelerated forward...
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This book was created as part of the SIRIUS B VERGE program to orient students astrophysics a broad field. The 2023-2024 and printing this is funded by Women Girls in Astronomy Program via International Astronomical Union's North American Regional Office for Development Heising-Simons Foundation; result, document written women astronomy girls who are looking pursue However, given its universal nature, material covered guide useful anyone interested pursuing professionally.