A5027254071- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Nuclear physics research studies
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Lightning and Electromagnetic Phenomena
- High-pressure geophysics and materials
- Silicon Effects in Agriculture
- Laser-induced spectroscopy and plasma
- Planetary Science and Exploration
- Radiation Effects in Electronics
- Chromium effects and bioremediation
Arizona State University
2017-2022
The ideal exoplanets to search for life are those within a star's habitable zone. However, even the zone planets can still develop uninhabitable climate states. Sustaining temperate over geologic ($\sim$Gyr) timescales requires planet contain sufficient internal energy power planetary-scale carbon cycle. A major component of rocky planet's budget is heat produced by decay radioactive elements, especially $^{40}$K, $^{232}$Th, $^{235}$U and $^{238}$U. As ages these elements decay, this...
A recent analysis of cosmic ray air showers observed at the Pierre Auger Observatory indicates that nearby starburst galaxies (SBGs) might be cause ∼10% Ultra-High-Energy Cosmic Ray flux energies E > 39 EeV . Since high energy neutrinos are a direct product interactions, we investigate SBGs as possible source some ∼ 10−2–1 PeV IceCube. statistical is performed to establish degree positional correlation between and set 45 radio- infrared-bright SBGs. Our results consistent with no causal...
Abstract Mixing above the proto-neutron star is believed to play an important role in supernova engine, and this mixing results a explosion with asymmetries. Elements produced innermost ejecta, e.g., 56 Ni 44 Ti, provide clean probe of engine. The production Ti particularly sensitive exact pathway and, by understanding available pathways, we can use Using thermodynamic trajectories from three-dimensional model, review these elements structures expected form under “convective-engine” paradigm...
Searches for spatial associations between high-energy neutrinos observed at the IceCube Neutrino Observatory and known astronomical objects may hold key to establishing neutrinos' origins of hadronic cosmic rays. While extragalactic sources like blazar TXS 0506+056 merit significant attention, Galactic also represent part puzzle. Here, we explore whether open clusters supernova remnants in Milky Way contribute measurably track-like neutrino events above 200 TeV. By searching positional...
Abstract The standard engine behind core-collapse supernovae is continuously evolving with increasingly detailed models. At this time, most simulations focus on an invoking turbulence above the proto-neutron star, sometimes termed “convection-enhanced” engine. Here we review and why it has become for normal supernovae, focusing a wide set of observations that provide insight into supernova
Abstract We present the isotope yields of two post-explosion, three-dimensional 15 <?CDATA ${M}_{\odot }$?> core-collapse supernova models, 15S and 15A, compare them to carbon, nitrogen, silicon, aluminum, sulfur, calcium, titanium, iron, nickel isotopic compositions SiC stardust. find that these models predict similar carbon nitrogen X grains with 12 C/ 13 C < 20 14 N/ N 60, which we will hereafter refer as ‘D’ grains. Material from interior a explosion reaches high enough temperatures...