Results 151 to 160 of about 8,426 (297)

Are Single-zone Emission Models Sufficient to Explain GRB 220426A and GRB 230812B?

The Astrophysical Journal
Gamma-ray bursts (GRBs) are the Universe’s most energetic phenomena (isotropic luminosity ∼10 ^51 –10 ^54 erg s ^−1 ) lasting for a very short duration (∼milliseconds—a few seconds).
Soumya Gupta, Sunder Sahayanathan, Saharsh Shanu, Rishabh Nath   +3 more
doaj   +1 more source

Flexible Chemiresistive Chitosan‐Glycerol Sensors on Laser‐Induced Graphene Electrodes for Room‐Temperature Ammonia Detection

Advanced Materials Technologies, EarlyView.
Flexible Chitosan‐glycerol sensor integrated with porous laser‐induced graphene (LIG) electrodes enable room‐temperature chemiresistive detection of ammonia (NH3) and proof‐of‐concept detection of fish spoilage. ABSTRACT We report a metal‐free sensor platform combining laser induced graphene (LIG) electrodes with drop‐deposited, glycerol‐plasticized ...
Mintesinot Tamiru Mengistu, Richard Murray, Cara‐Lena Nies, Cathal Larrigy, Martina Piletti, Jahidul Islam, Daniela Iacopino, Eileen Hurley, Michael Nolan, Aidan J. Quinn   +9 more
wiley   +1 more source

Investigation of the Gamma-Ray Bursts Prompt Emission Under the Relativistically Expanding Fireball Scenario

The Astrophysical Journal Letters
The spectral properties of a composite thermal emission arising from a relativistic expanding fireball can be remarkably different from the Planck function.
Soumya Gupta, Sunder Sahayanathan
doaj   +1 more source

The Influence of Mesoscale Particle Structure on the Electrode Degradation and Resultant Electrochemistry of Lithium Ion Cells With Nickel Rich Lithium Nickel Manganese Cobalt Oxide Positive Electrodes

Advanced Materials Technologies, EarlyView.
Milled polycrystalline NMC811 cathode (MPC NMC) with smaller secondary particle and higher surface area had 1) greater cathode tortuosity, 2) reduced surface Ni on the cycled MPC cathodes consistent with surface reconstruction, and 3) increased Ni deposition from cathode‐anode crosstalk, manifesting in lower functional capacity and higher impedance ...
Edelmy J. Marin Bernardez, Andrew Nicoll, David J. Arnot, Armando Rodriguez Campos, Patrick J. Barry, Marie F. Millares, Cynthia Huang, Melissa A. Guercio, Grace K. Dono, Alexis Pace, Xianghui Xiao, Cherno Jaye, Conan Weiland, Jianming Bai, Hui Zhong, Michael Drakopoulos, Zhong Zhong, Nghia T. Vo, Xiao Tong, Esther S. Takeuchi, Amy C. Marschilok, Shan Yan, Kenneth J. Takeuchi   +22 more
wiley   +1 more source

Evidence for Diverse Optical Emission from Gamma-Ray Burst Sources

, 2007
Optical Transients from gamma-ray burst sources, in addition to offering a distance determination, convey important information on the physics of the emission mechanism, and perhaps also about the underlying energy source.
J. M. Rodriguez Espinosa, F. Frontera, H. Pedersen, A. M. Perez, L. Monaldi, Pedersen Copenhagen, M. I. Andersen, M. Lacy   +7 more
core  

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source

Highly Anisotropic Quasi‐Direct Organic Metal Halide Hybrids: A Platform for Polarization‐Sensitive Optoelectronics

Advanced Materials Technologies, EarlyView.
One‐dimensional C4N2H14PbBr4 is shown to have a quasi‐direct electronic band structure and strongly anisotropic transport with polarized broadband emission. A GW/Bethe–Salpeter excited‐state force formalism, supported by polarized Raman and temperature‐dependent photoluminescence, identifies low–frequency Pb–Br phonons that drive ultrafast exciton self‐
Rijan Karkee, Rafael R. Del Grande, Yeonjoo Lee, Jinkyoung Yoo, Azza Ben‐Akacha, Biwu Ma, Michael T. Pettes, David A. Strubbe   +7 more
wiley   +1 more source

Distributions of Energy, Luminosity, Duration, and Waiting Times of Gamma-Ray Burst Pulses with Known Redshift Detected by Fermi/GBM

The Astrophysical Journal
Discovered more than 50 years ago, gamma-ray burst (GRB) prompt emission remains the most puzzling aspect of GRB physics. Its complex and irregular nature should reveal how newborn GRB engines release their energy.
R. Maccary, C. Guidorzi, L. Amati, L. Bazzanini, M. Bulla, A. E. Camisasca, L. Ferro, F. Frontera, A. Tsvetkova   +8 more
doaj   +1 more source

Search for extremely short transientgamma-ray sources with the VERITAS observatory

, 2016
Humboldt-Universität zu Berlin, Diss., 2016; 165 p.(2016).
openaire   +2 more sources

Fermi Establishes Classical Novae as a Distinct Class of Gamma-ray Sources

, 2014
A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion.
Blandford, R. D., Hays, E., Harding, A. K., Buehler, R., Ajello, M., Bottacini, E., Bloom, E. D., Caliandro, G. A., Thompson, D. J., Perkins, J. S., Brandt, T. J., Bellazzini, R., Albert, A., Baldini, L., Caragiulo, M., Ferrara, E. C., Buson, S., Ackermann, M., Ballet, J., Bregeon, J., Caraveo, P. A., Cameron, R. A., Bastieri, D., Bissaldi, E., Bruel, P.   +24 more
core