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41 papers · 2 filters
Search for high-energy neutrinos from bright GRBs with ANTARES
A. Albert, M. André, M. Anghinolfi +125
Gamma-ray bursts are thought to be sites of hadronic acceleration, thus neutrinos are expected from the decay of charged particles, produced in pγ interactions. The methods and res…
Results from the search for dark matter in the Milky Way with 9 years of data of the ANTARES neutrino telescope
A. Albert, M. André, M. Anghinolfi +125
Using data recorded with the ANTARES telescope from 2007 to 2015, a new search for dark matter annihilation in the Milky Way has been performed. Three halo models and five annihila…
Black holes formed by direct collapse: observational evidences
I. F. Mirabel
Binary black holes as the recently detected sources of gravitational waves can be formed from massive stellar binaries in the field or by dynamical interactions in clusters of high…
Stellar progenitors of black holes: insights from optical and infrared observations
I. F. Mirabel
Here are reviewed the insights from observations at optical and infrared wavelengths for low mass limits above which stars do not seem to end as luminous supernovae. These insights…
First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. observations of FRB 150418
H. E. S. S. Collaboration, :, H. Abdalla +265
Aims: Following the detection of the fast radio burst FRB150418 by the SUPERB project at the Parkes radio telescope, we aim to search for very-high energy gamma-ray afterglow emiss…
Fe K and ejecta emission in SNR G15.9+0.2 with XMM-Newton
Pierre Maggi, Fabio Acero
Aims: We present a study of the Galactic supernova remnant SNR G15.9+0.2 with archival XMM-Newton observations. Methods: EPIC data are used to investigate the morphological and spe…
The e-ASTROGAM mission (exploring the extreme Universe with gamma rays in the MeV-GeV range)
Alessandro De Angelis, Vincent Tatischeff, Marco Tavani +71
e-ASTROGAM (`enhanced ASTROGAM') is a breakthrough Observatory mission dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV. The miss…
Study of the very high energy gamma-ray spectrum from the Galactic Center and future prospects
Alexander V. Belikov, Emmanuel Moulin, Joseph Silk
Ground-based gamma ray observations of the Galactic Center region have revealed a high energy gamma ray source spatially coincident with the gravitational centroid of our Galaxy. T…
The Highest-Energy Cosmic Rays Cannot be Dominantly Protons from Steady Sources
Ke Fang, Kumiko Kotera
The bulk of observed ultrahigh energy cosmic rays could be light or heavier elements, and originate from an either steady or transient population of sources. This leaves us with fo…
Constraining the geometry of PSR J0855-4644: A nearby Pulsar Wind Nebula with Double Torus/Jet Morphology
Chandreyee Maitra, Fabio Acero, Christo Venter
Aims: PSR J0855-4644 is a fast-spinning, energetic pulsar discovered at radio wavelengths near the south-eastern rim of the supernova remnant RX J0852.0-4622. A follow-up observati…
Multi-wavelength observations of IGR J17544-2619 from quiescence to outburst
E. Bozzo, V. Bhalerao, P. Pradhan +12
In this paper we report on a long multi-wavelength observational campaign of the supergiant fast X-ray transient prototype IGR J17544-2619. A 150 ks-long observation was carried ou…
Characterizing the gamma-ray long-term variability of PKS 2155-304 with H.E.S.S. and Fermi-LAT
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +244
Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the v…
Magnetorotational instability in neutron star mergers: impact of neutrinos
Jerome Guilet, Andreas Bauswein, Oliver Just +1
The merger of two neutron stars may give birth to a long-lived hypermassive neutron star. If it harbours a strong magnetic field of magnetar strength, its spin-down could explain s…
Measurement of the X-ray proper motion in the south-east rim of RX J1713.7-3946
Fabio Acero, Satoru Katsuda, Jean Ballet +1
We report on the first proper motion measurement in the supernova remnant RX J1713.7-3946 using the XMM-Newton X-ray telescope on a 13 year time interval. This expansion measuremen…
Magnetically elevated accretion disks in active galactic nuclei: broad emission line regions and associated star formation
Mitchell C. Begelman, Joseph Silk
We propose that the accretion disks fueling active galactic nuclei are supported vertically against gravity by a strong toroidal (direction) magnetic field that develops natura…
H.E.S.S. limits on line-like dark matter signatures in the 100 GeV to 2 TeV energy range close to the Galactic Centre
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +246
A search for dark matter line-like signals was performed in the vicinity of the Galactic Centre by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likeliho…
Dark Matter in lines: Galactic Center vs dwarf galaxies
Valentin Lefranc, Emmanuel Moulin, Paolo Panci +2
We provide CTA sensitivities to Dark Matter (DM) annihilation in -ray lines, from the observation of the Galactic Center (GC) as well as, for the first time, of dwarf Spheroidal…
The Formation of Stellar Black Holes
I. F. Mirabel
It is believed that stellar black holes (BHs) can be formed in two different ways: Either a massive star collapses directly into a BH without a supernova (SN) explosion, or an expl…
Identifying Ultrahigh-Energy Cosmic-Ray Accelerators with Future Ultrahigh-Energy Neutrino Detectors
Ke Fang, Kumiko Kotera, M. Coleman Miller +2
The detection of ultrahigh-energy (UHE) neutrino sources would contribute significantly to solving the decades-old mystery of the origin of the highest-energy cosmic rays. We inves…
Time-dependent search for neutrino emission from x-ray binaries with the ANTARES telescope
A. Albert, M. André, G. Anton +115
ANTARES is currently the largest neutrino telescope operating in the Northern Hemisphere, aiming at the detection of high-energy neutrinos from astrophysical sources. Neutrino tele…
Fermi Large Area Telescope Observations of the Monoceros Loop Supernova Remnant
H. Katagiri, S. Sugiyama, M. Ackermann +8
We present an analysis of the gamma-ray measurements by the Large Area Telescope onboard the \textit{Fermi Gamma-ray Space Telescope} in the region of the supernova remnant~(SNR) M…
Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
H. E. S. S. Collaboration, :, H. Abdallah +245
The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a searc…
Limits on Lorentz invariance violation at the Planck energy scale from H.E.S.S. spectral analysis of the blazar Mrk 501
Matthias Lorentz, Pierre Brun
Some extensions to the Standard Model lead to the introduction of Lorentz symmetry breaking terms, expected to induce deviations from Lorentz symmetry around the Planck scale. A pa…
Short GRBs at the dawn of the gravitational wave era
G. Ghirlanda, O. S. Salafia, A. Pescalli +16
We derive the luminosity function and redshift distribution of short Gamma Ray Bursts (SGRBs) using (i) all the available observer-frame constraints (i.e. peak flux, fluence, peak…