Results 31 to 40 of about 99,264 (157)

Unidirectional gradient of galactic cosmic ray intensity at different cut-off rigidities and solar magnetic polarities

open access: yesJournal of Physics: Conference Series, 2023
Energetic charged particles known as Galactic cosmic rays (GCRs) are mostly protons originating from supernova remnants. The solar wind modulates the GCR intensity near-Earth along the solar cycles (SCs) in association with the heliospheric magnetic ...
C. Wuttiya, T. Yeeram
semanticscholar   +1 more source

Superluminous supernovae: No threat from Eta Carinae [PDF]

open access: yes, 2007
Recently Supernova 2006gy was noted as the most luminous ever recorded, with a total radiated energy of ~10^44 Joules. It was proposed that the progenitor may have been a massive evolved star similar to eta Carinae, which resides in our own galaxy at a ...
Adrian L. Melott   +5 more
core   +1 more source

Inhomogeneity in the Supernova Remnant Distribution as the Origin of the PAMELA Anomaly [PDF]

open access: yes, 2009
Recent measurements of the positron/electron ratio in the cosmic ray (CR) flux exhibits an apparent anomaly, whereby this ratio increases between 10 and 100 GeV.
N. Shaviv, E. Nakar, T. Piran
semanticscholar   +1 more source

Modeling of the Vela complex including the Vela supernova remnant, the binary system γ2 Velorum, and the Gum nebula [PDF]

open access: yes, 2010
We study the geometry and dynamics of the Vela complex including the Vela supernova remnant (SNR), the binary system γ 2 Velorum and the Gum nebula. We show that the Vela SNR belongs to a subclass of non-Sedov adiabatic remnants in a cloudy interstellar ...
I. Sushch, B. Hnatyk, A. Neronov
semanticscholar   +1 more source

Physics potential of future supernova neutrino observations [PDF]

open access: yes, 2008
We point out possible features of neutrino spectra from a future galactic core collapse supernova that will enhance our understanding of neutrino mixing as well as supernova astrophysics.
Amol Dighe   +30 more
core   +2 more sources

Determination of acceleration mechanism characteristics directly and nonparametrically from observations: Application to supernova remnants [PDF]

open access: yes, 2013
We have developed an inversion method for determination of the characteristics of the acceleration mechanism directly and non-parametrically from observations, in contrast to the usual forward fitting of parametric model variables to observations. In two
V. Petrosian, Qingrong Chen
semanticscholar   +1 more source

Density profiles of supernova matter and determination of neutrino parameters

open access: yes, 2007
The flavor conversion of supernova neutrinos can lead to observable signatures related to the unknown neutrino parameters. As one of the determinants in dictating the efficiency of resonant flavor conversion, the local density profile near the MSW ...
S. P. Mikheyev   +2 more
core   +1 more source

The day before Betelgeuse dies: identifying a near-earth pre- supernova star from its neutrinos

open access: yes, 2021
Parallel Contributed Talk at the "XIX International Workshop on Neutrino Telescopes" on line - 18-26 February ...
openaire   +1 more source

THE CHANGING EVENT SURVEY: TRANSIENTS, SPACE DEBRIS & NEOs

open access: yesRevista Mexicana de Astronomía y Astrofísica Serie de Conferencias, 2021
Motivated by the promising era of time-domain and multi-messenger astronomy, CHanging Event Survey (CHES) is designed to join the ongoing campaign with a powerful wide-field optical telescope array.
T. Sun, C. Zhang, Y. Ping, X. Wu
semanticscholar   +1 more source

The contribution of supernova remnants to the galactic cosmic ray spectrum

open access: yes, 2010
The supernova paradigm for the origin of galactic cosmic rays has been deeply affected by the development of the non-linear theory of particle acceleration at shock waves. Here we discuss the implications of applying such theory to the calculation of the
Amato   +34 more
core   +1 more source

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