Results 21 to 30 of about 49,076 (222)

Shear Particle Acceleration in Structured Gamma-Ray Burst Jets. I. Physical Origin of the Band Function and Application to GRBs 090926A, 131108A, and 160509A

open access: yesThe Astrophysical Journal
The radiation physics of gamma-ray bursts (GRBs) remains an open question. Based on the simulation analysis and recent observations, it was proposed that GRB jets are composed of a narrow ultrarelativistic core surrounded by a wide subrelativistic cocoon.
Zi-Qi Wang, Xiao-Li Huang, En-Wei Liang
doaj   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

open access: yesAging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Shear Particle Acceleration in Structured Gamma-Ray Burst Jets. III. The Radiation Physics of Bright Prompt Optical Flash

open access: yesThe Astrophysical Journal
The radiation physics of bright prompt optical emission of gamma-ray bursts (GRBs) remains a puzzle. Assuming that the GRB ejecta is structured, we investigated this issue by characterizing the ejecta as an ultrarelativistic uniform jet core surrounded ...
Zi-Qi Wang, Xiao-Li Huang, En-Wei Liang
doaj   +1 more source

Artificial Intelligence in Systemic Sclerosis: Clinical Applications, Challenges, and Future Directions

open access: yesArthritis Care &Research, EarlyView.
Systemic sclerosis (SSc) is a rare autoimmune disease defined by immune dysregulation, vasculopathy, and progressive fibrosis of the skin and internal organs. Despite advances in care, major complications such as interstitial lung disease (ILD) and myocardial involvement remain the leading causes of morbidity and mortality.
Cristiana Sieiro Santos   +2 more
wiley   +1 more source

Magnetic Interactions in White Dwarf Binaries as Mechanism for Long-period Radio Transients

open access: yesThe Astrophysical Journal
A growing population of long-period radio transients has been discovered, and their physical origin is still up for debate. Recently, a new such source named ILT J1101+5521 was discovered, which is in a white dwarf (WD)–red dwarf (RD) binary system, with
Yuanhong Qu, Bing Zhang
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

open access: yesAdvanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold   +2 more
wiley   +1 more source

Spatial Distribution of Secondary Electrons’ Synchrotron Emission: Property and Implication

open access: yesThe Astrophysical Journal
Galactic γ -ray sources can be produced by either high-energy protons via proton–proton collisions or electrons/positrons via inverse Compton scattering.
Qi-Zuo Wu, Ruo-Yu Liu
doaj   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

open access: yesAdvanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu   +10 more
wiley   +1 more source

Does Prompt Gamma-Ray Burst Fireball Composition Impact on Afterglow Emission? Case Study for Long GRBs 080916C/090902B and Short GRBs 090510/130603B

open access: yesThe Astrophysical Journal
Broadband observations with the Fermi mission reveal that a large fraction of gamma-ray burst (GRB) spectra are dominated by nonthermal emission, while a small fraction are dominated by thermal/quasi-thermal emission, likely indicating the difference in ...
Yu Gan   +5 more
doaj   +1 more source

A New Insight into Electron Acceleration Properties from Theoretical Modeling of Double-peaked Radio Light Curves in Core-collapse Supernovae

open access: yesThe Astrophysical Journal, 2023
It is recognized that some core-collapse supernovae (SNe) show a double-peaked radio light curve within a few years since the explosion. A shell of circumstellar medium (CSM) detached from the SN progenitor has been considered to play a viable role in ...
Tomoki Matsuoka   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy