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Cosmic-ray production from neutron escape in microquasar jets
(EDP Sciences, 2021-06)
Context. The origin of Galactic cosmic rays remains a matter of debate, but supernova remnants are commonly considered to be the main place where high-energy cosmic rays are accelerated. Nevertheless, current models predict ...
Forever young white dwarfs : when stellar ageing stops
(EDP Sciences, 2021-05)
White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. ...
Neutrino Oscillations and Decoherence in Short-GRB Progenitors
(IOP Publishing, 2019-02-12)
Neutrinos are produced in cosmic accelerators, like active galactic nuclei, blazars, supernova remnants and gamma-ray bursts (GRBs). On their way to the Earth they experience flavor oscillations. The interactions of the ...
The investigation of particle acceleration in colliding-wind massive binaries with SIMBOL-X
(Società Astronomica Italiana, 2008-12)
An increasing number of early-type (O and Wolf-Rayet) colliding wind binaries (CWBs) is known to accelerate particles up to relativistic energies. In this context, nonthermal emission processes such as inverse Compton (IC) ...
A multi-wavelength view of the cosmic ray confinement in star-forming galaxies
(Sissa, 2021-07)
Cosmic rays (CRs) are responsible for a tight correlation between the star formation rate (SFR) and the radio/γ-ray luminosity observed in star-forming galaxies (SFGs). This correlation can be explained by a linear scaling ...
The formation of ultra-massive carbon-oxygen core white dwarfs and their evolutionary and pulsational properties
(EDP Sciences, 2021-02)
Context. The existence of ultra-massive white dwarf stars, MWD & 1.05 M, has been reported in several studies. These white dwarfs are relevant for the role they play in type Ia supernova explosions, the occurrence of ...
Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS J1018-589
(EDP Sciences, 2012-05)
The Carina arm region, containing the supernova remnant SNR G284.3-1.8, the high-energy (HE; E > 100 MeV) binary 1FGL J1018.6-5856 and the energetic pulsar PSR J1016-5857 and its nebula, has been observed with the H.E.S.S. ...
HESS observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae
(Wiley Blackwell Publishing, Inc, 2012-07)
The massive binary system Eta Carinae and the surrounding Hii complex, the Carina nebula, are potential particle acceleration sites from which very high energy (VHE; E≥ 100GeV) γ-ray emission could be expected. This paper ...