Results 1 to 10 of about 1,887,037 (257)

PeV Emission of the Crab Nebula: Constraints on the Proton Content in Pulsar Wind and Implications [PDF]

open access: bronzeAstrophysical Journal, 2021
Recently, two photons from the Crab Nebula with energy of approximately 1 PeV were detected by the Large High Altitude Air Shower Observatory (LHAASO), opening an ultrahigh-energy window for studying pulsar wind nebulae (PWNe).
Ruo-Yu Liu, Xiang‐Yu Wang
openalex   +3 more sources

SiO Emission from the Orion Nebula [PDF]

open access: bronzeSymposium - International Astronomical Union, 1980
SiO emission in both a strong maser transition in the first excited vibrational state and in a weaker transition in the ground vibrational state both arise from the same small region in the Kleinmann-Low Nebula in Orion. Within the errors, the source position coincides with that of the infrared source IRc2.
B. Baud   +5 more
openalex   +2 more sources

Detection of Gamma-Ray Emission from the Vela Pulsar Wind Nebula with AGILE [PDF]

open access: greenScience, 2010
Pulsar Wind Nebula Pulsar wind nebulae are the result of the interaction between the wind of relativistic charged particles emitted by pulsars and their surrounding interstellar medium. Using the AGILE satellite, Pellizzoni et al. (p.
A. Pellizzoni   +70 more
openalex   +3 more sources

APOE, ABCA7, and RASGEF1C are associated with earlier onset of amyloid deposition from more than 4000 harmonized positron emission tomography images. [PDF]

open access: yesAlzheimers Dement
Abstract INTRODUCTION New methods estimate amyloid positivity onset age (EAOA) from amyloid positron emission tomography (PET). We explore the genetics of EAOA to identify molecular factors underlying the earliest Alzheimer's disease (AD) changes. METHODS Harmonized amyloid PET data from 4216 participants were used in genome‐wide survival, tissue ...
Castellano T   +32 more
europepmc   +2 more sources

Peta–electron volt gamma-ray emission from the Crab Nebula [PDF]

open access: yesScience, 2021
High-energy photons from the Crab Nebula The Crab Nebula contains a pulsar that excites the surrounding gas to emit high-energy radiation. The combination of the pulsar's youth and nearby location makes the nebula the brightest gamma-ray source in the ...
Z. Cao   +270 more
semanticscholar   +1 more source

Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula [PDF]

open access: yesAstrophysical Journal, 2020
The first repeating fast radio burst (FRB), FRB 121102, was found to be associated with a spatially coincident, persistent nonthermal radio source, but the origin of the persistent emission remains unknown.
Qiao-Chu Li, Yuanpei Yang, Z. Dai
semanticscholar   +1 more source

Observations of the planetary nebula SMP LMC 058 with the JWST MIRI medium resolution spectrometer [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2023
During the commissioning of JWST, the Medium-Resolution Spectrometer (MRS) on the Mid-Infrared Instrument (MIRI) observed the planetary nebula SMP LMC 058 in the Large Magellanic Cloud.
O. Jones   +23 more
semanticscholar   +1 more source

Vela pulsar wind nebula X-rays are polarized to near the synchrotron limit. [PDF]

open access: yesNature, 2022
Pulsar wind nebulae are formed when outflows of relativistic electrons and positrons hit the surrounding supernova remnant or interstellar medium at a shock front.
F. Xie   +92 more
semanticscholar   +1 more source

Positron flux and γ-ray emission from Geminga pulsar and pulsar wind nebula [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Nearby pulsars have been suggested as sources of $\sim$TeV $e^+/e^-$ Cosmic Ray (CR) excess on Earth. The High-Altitude Water Cherenkov Observatory (HAWC) detected extended TeV emission regions in the direction of two nearby middle-aged pulsars, Geminga ...
Xiaping Tang, T. Piran
semanticscholar   +1 more source

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