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47 papers · 2 filters
An X-ray survey of the central molecular zone: variability of the Fe Ka emission line
R. Terrier, M. Clavel, S. Soldi +4
There is now abundant evidence that the luminosity of the Galactic super-massive black hole (SMBH) has not always been as low as it is nowadays. The observation of varying non-ther…
High-energy neutrinos from Galactic superbubbles
K. J. Andersen, M. Kachelriess, D. V. Semikoz
We study the propagation of cosmic rays generated by sources residing inside superbubbles. We show that the enhanced magnetic field in the bubble wall leads to an increase of the i…
On the Progenitor of Binary Neutron Star Merger GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1095
On 2017 August 17 the merger of two compact objects with masses consistent with two neutron stars was discovered through gravitational-wave (GW170817), gamma-ray (GRB 170817A), and…
TeV gamma-ray observations of the binary neutron star merger GW170817 with H.E.S.S
H. E. S. S. Collaboration, :, H. Abdalla +250
We search for high-energy gamma-ray emission from the binary neutron star merger GW170817 with the H.E.S.S. Imaging Air Cherenkov Telescopes. The observations presented here have b…
All-flavor search for a diffuse flux of cosmic neutrinos with 9 years of ANTARES data
ANTARES Collaboration, A. Albert, M. André +125
The ANTARES detector is at present the most sensitive neutrino telescope in the Northern Hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube…
Cloud ablation by a relativistic jet and the extended flare in CTA 102 in 2016 and 2017
M. Zacharias, M. Böttcher, F. Jankowsky +3
In late 2016 and early 2017 the flat spectrum radio quasar CTA 102 exhibited a very strong and long-lasting outburst. The event can be described by a roughly 2 months long increase…
GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1101
On June 8, 2017 at 02:01:16.49 UTC, a gravitational-wave signal from the merger of two stellar-mass black holes was observed by the two Advanced LIGO detectors with a network signa…
Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ANTARES, IceCube, and the Pierre Auger Observatory
A. Albert, M. Andre, M. Anghinolfi +1931
The Advanced LIGO and Advanced Virgo observatories recently discovered gravitational waves from a binary neutron star inspiral. A short gamma-ray burst (GRB) that followed the merg…
HESS J1741-302: a hidden accelerator in the Galactic plane
H. E. S. S. Collaboration, :, H. Abdalla +252
The H.E.S.S. collaboration has discovered a new very high energy (VHE, E 0.1 TeV) -ray source, HESS J1741-302, located in the Galactic plane. Despite several attempts to con…
Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
LIGO Scientific Collaboration, Virgo Collaboration, Fermi Gamma-Ray Burst Monitor +1
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB 170817A was observed independently…
Hyperons in hot dense matter: what do the constraints tell us for equation of state?
M. Fortin, M. Oertel, C. Providência
For core-collapse and neutron star merger simulations it is important to have at hand adequate equations of state, describing the underlying dense and hot matter as realistically a…
Accurate ray tracing of realistic neutron star atmospheres for constraining their parameters
F. H. Vincent, M. Bejger, A. Rozanska +9
Thermal dominated X-ray spectra of neutron stars in quiescent transient X-ray binaries and neutron stars that undergo thermonuclear bursts are sensitive to mass and radius. The mas…
Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1105
The first observation of a binary neutron star coalescence by the Advanced LIGO and Advanced Virgo gravitational-wave detectors offers an unprecedented opportunity to study matter…
Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
E. Pian, P. D'Avanzo, S. Benetti +81
The merger of two neutron stars is predicted to give rise to three major detectable phenomena: a short burst of gamma-rays, a gravitational wave signal, and a transient optical/nea…
INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
V. Savchenko, C. Ferrigno, E. Kuulkers +20
We report the e INTernational Gamma-ray Astrophysics Laboratory (INTEGRAL) detection of the short gamma-ray burst GRB 170817A (discovered by Fermi-GBM) with a signal-to-noise ratio…
Non-linear acceleration at supernova remnant shocks and the hardening in the cosmic ray spectrum
S. Recchia, S. Gabici
In the last few years several experiments have shown that the cosmic ray spectrum below the knee is not a perfect power-law. In particular, the proton and helium spectra show a spe…
Time Evolution of Gamma Rays from Supernova Remnants
Daniele Gaggero, Fabio Zandanel, Pierre Cristofari +1
We present a systematic phenomenological study focused on the time evolution of the non-thermal radiation - from radio waves to gamma rays - emitted by typical supernova remnants v…
Reconciling cosmic ray diffusion with Galactic magnetic field models
G. Giacinti, M. Kachelriess, D. V. Semikoz
We calculate the diffusion coefficients of charged cosmic rays (CR) propagating in regular and turbulent magnetic fields. If the magnetic field is dominated by an isotropic turbule…
Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1100
The source of the gravitational-wave signal GW170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observati…
Cosmic ray signatures of a 2-3 Myr old local supernova
M. Kachelriess, A. Neronov, D. V. Semikoz
The supernova explosion which deposited Fe isotopes on Earth 2-3 million years ago should have also produced cosmic rays which contribute to the locally observed cosmic ray…
On magnetic field amplification and particle acceleration near non-relativistic astrophysical shocks: Particles in MHD Cells simulations
Allard Jan van Marle, Fabien Casse, Alexandre Marcowith
We present simulations of magnetized astrophysical shocks taking into account the interplay between the thermal plasma of the shock and supra-thermal particles. Such interaction is…
Supernova remnants in the very-high-energy gamma-ray domain: the role of the Cherenkov telescope array
P. Cristofari, S. Gabici, T. B. Humensky +4
Supernova remnants are often presented as the most probable sources of Galactic cosmic rays. This idea is supported by the accumulation of evidence that particle acceleration is ha…
INTEGRAL observations of GW170104
V. Savchenko, C. Ferrigno, E. Bozzo +16
We used data from the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) to set upper-limits on the -ray and hard X-ray prompt emission associated with the gravitational…
Luminous and high-frequency peaked blazars: the origin of the -ray emission from PKS 1424+240
M. Cerruti, W. Benbow, X. Chen +3
The current generation of Cherenkov telescopes, together with Fermi-LAT, have greatly increased our knowledge of -ray blazars. Among them, the high-frequency-peaked BL Lacertae…