Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Globus, Noemie"'
Autor:
Blandford, Roger, Simeon, Paul, Globus, Noémie, Mukhopadhyay, Payel, Peretti, Enrico, Barrow, Kirk S. S.
The hypothesis that the entire cosmic ray spectrum, from $\lesssim1\,{\rm GeV}$ to $\gtrsim100\,{\rm EeV}$ energy, can be accounted for by diffusive shock acceleration on increasingly large scales is critically examined. Specifically, it is conjectur
Externí odkaz:
http://arxiv.org/abs/2309.09116
Autor:
Muzio, Marco Stein, Globus, Noémie
We consider how the cutoff of the ultrahigh energy neutrino spectrum introduces an effective neutrino horizon, allowing for future neutrino detectors to measure an anisotropy in neutrino arrival directions driven by the local large-scale structure. W
Externí odkaz:
http://arxiv.org/abs/2308.16225
Autor:
Muzio, Marco Stein, Globus, Noémie
We present the extent to which anisotropies in the ultrahigh energy neutrino sky can probe the distribution of extreme astrophysical accelerators in the universe. In this talk, we discuss the origin of an anisotropic neutrino sky and show how observe
Externí odkaz:
http://arxiv.org/abs/2308.07211
Extreme Energy Cosmic Rays, EECRs -- cosmic rays with energies beyond the GZK cutoff (i.e. greater than 100 EeV) are scarce. Only a few of such events have been detected by air shower experiments and the nature of the primary particles are still unkn
Externí odkaz:
http://arxiv.org/abs/2308.06842
Autor:
Globus, Noemie, Blandford, Roger
Understanding the acceleration of Ultra High Energy Cosmic Rays is one of the great challenges of contemporary astrophysics. In this short review, we summarize the general observational constraints on their composition, spectrum and isotropy which in
Externí odkaz:
http://arxiv.org/abs/2302.06791
The origin of cosmic rays above the knee in the spectrum is an unsolved problem. We present a wind model in which interstellar gas flows along a non-rotating, expanding flux tube with a changing speed and cross-sectional area. Cosmic rays from Galact
Externí odkaz:
http://arxiv.org/abs/2301.08902
The origin of Ultra High Energy Cosmic Rays is a 60-year old mystery. We show that with more events at the highest energies (above 150~EeV) it may be possible to limit the character of the sources and learn about the intervening magnetic fields. Indi
Externí odkaz:
http://arxiv.org/abs/2210.15885
Autor:
Lopez-Rodriguez, Enrique, Kishimoto, Makoto, Antonucci, Robert, Begelman, Mitchell C., Globus, Noemie, Blandford, Roger
The dichotomy between radio-loud (RL) and radio-quiet (RQ) active galactic nuclei (AGN) is thought to be intrinsically related to radio jet production. This difference may be explained by the presence of a strong magnetic field (B-field) that enhance
Externí odkaz:
http://arxiv.org/abs/2207.09466
Autor:
Blandford, Roger, Globus, Noemie
A brief summary is given of an alternative interpretation of the Event Horizon Telescope observations of the massive black hole in the nucleus of the nearby galaxy M87. It is proposed that the flow is primarily powered by the black hole rotation, not
Externí odkaz:
http://arxiv.org/abs/2207.05839
Autor:
Blandford, Roger, Globus, Noemie
We interpret the 1.3mm VLBI observations made by the Event Horizon Telescope of the black hole in M87. It is proposed that, instead of being a torus of accreting gas, the observed annular ring is a rotating, magnetically-dominated ergomagnetosphere t
Externí odkaz:
http://arxiv.org/abs/2204.11995