Results 41 to 50 of about 1,899,768 (248)
On the magnetohydrodynamic modelling of the Crab nebula radio emission [PDF]
, 2013 In recent years, it has become a well-established paradigm that many aspects of the physics of Pulsar Wind Nebulae (PWNe) can be fully accounted for within a relativistic MHD description.
B. Olmi +4 more
semanticscholar +1 more source
Fast radio bursts as synchrotron maser emission from decelerating relativistic blast waves [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Fast radio bursts (FRBs) can arise from synchrotron maser emission at ultrarelativistic magnetized shocks, such as produced by flare ejecta from young magnetars. We combine particle-in-cell simulation results for the maser emission with the dynamics of
B. Metzger, B. Margalit, L. Sironi
semanticscholar +1 more source
A SEARCH FOR ENHANCED VERY HIGH ENERGY GAMMA-RAY EMISSION FROM THE 2013 MARCH CRAB NEBULA FLARE [PDF]
, 2013 In 2013 March, a flaring episode from the Crab Nebula lasting ∼2 weeks was detected by Fermi-LAT (Large Area Telescope on board the Fermi Gamma-ray Space Telescope).
E. Aliu +78 more
semanticscholar +1 more source
Shedding new light on the Crab with polarized X-rays
Scientific Reports, 2017 Strong magnetic fields, synchrotron emission, and Compton scattering are omnipresent in compact celestial X-ray sources. Emissions in the X-ray energy band are consequently expected to be linearly polarized. X-ray polarimetry provides a unique diagnostic
M. Chauvin +15 more
doaj +1 more source
Gamma-rays from the pulsar wind nebulae [PDF]
Astron.Astrophys. 405 (2003) 689, 2003 We investigate the radiation processes inside supernova remnants which are powered by young pulsars. Using recent model for particle acceleration by the pulsar wind nebulae, we obtain the equilibrium spectra of leptons and nuclei inside the nebula as a function of time.
arxiv +1 more source
Exploring the high abundance discrepancy in the planetary nebula IC 4663
Frontiers in Astronomy and Space Sciences, 2023 This article presents an in-depth analysis of integral field unit spectroscopy performed on the Galactic planetary nebula (PN) IC 4663, with a primary focus on investigating its physical characteristics, chemical composition, and morphological properties.
M. Mohery +4 more
doaj +1 more source
HI and CO Observations of Circumnebular Envelopes of Planetary Nebulae [PDF]
, 1994 21cm spectral-line and continuum observations of ten compact planetary nebulae have been made with the Very Large Array. Circumnebular atomic hydrogen is identified in the planetary nebulae SwSt1, M3-35, and possibly in Hu2-1. The possibility of an inverse correlation between the optical depth of circumnebular atomic hydrogen and the linear radius of ...
arxiv +1 more source
On the bipolarity of Wolf-Rayet nebulae [PDF]
, 2021 Wolf-Rayet stars are amongst the rarest but also most intriguing massive stars. Their extreme stellar winds induce famous multi-wavelength circumstellar gas nebulae of various morphologies, spanning from circles and rings to bipolar shapes. This study is devoted to the investigation of the formation of young, asymmetric Wolf-Rayet gas nebulae and we ...
arxiv +1 more source
Photometric and spectroscopic study of five pre-main sequence stars in the vicinity of NGC 7129 [PDF]
Serbian Astronomical Journal, 2019 We present results from long-term optical photometric and spectroscopic observations of five pre-main sequence stars, located in the vicinity of the bright nebula NGC 7129.
Semkov E.H., Ibryamov S.I., Peneva S.P.
doaj +1 more source
Bursts of the Crab Nebula gamma-ray emission at high and ultra-high energies
EPJ Web of Conferences, 2017 Characteristics of the flares of gamma rays detected from the Crab Nebula by the AGILE and Fermi-LAT satellite instruments are compared with those of a gamma ray burst recorded by several air shower arrays on February 23, 1989 and with one recent ...
Lidvansky A.S.
doaj +2 more sources