First ground-based measurement of sub-20 GeV to 100 GeV gamma-ray pulsations from the Vela pulsar
November 2018 Pulsars are fast rotating (up to ~1000 rotations per second) and strongly magnetised (magnetic field intensities are trillion times that of the Earth) neutron stars.These compact objects (~1.4 solar masses, but a…
A Powerful Couple – Energetics of the old friend PSR B1259-63
October 2018 Whenever things collide, it gets interesting. Especially in space. A majority of the stars in our universe do not just live a happy life alone, but they are part of gravitationally bound…
Probing Lorentz symmetry at the Planck scale with Mrk 501
September 2018 Fig. 1: Artist’s view of how quantum spacetime may look like at Planck scale. The tiny fluctuations illustrated here may affect how photons propagate in vacuum. Image Credit: NASA/CXC/M.Weiss. Lorentz invariance is…
The first hint for a cosmic-ray accelerator?
August 2018 Fig. 1: Blazars are a type of active galaxy with one of its jets pointing toward us. In the left-panel, the position of the blazar TXS 0506+056 is indicated, sitting just below…
A joint X-ray and gamma-ray study of the Vela X pulsar wind nebula
July 2018 Pulsars are extreme stars left behind after the explosions of certain supernovae. They have masses slightly larger than the Sun, but concentrated in a very compact volume with a radius of approximately…
The tail of Centaurus A
June 2018 Centaurus A is the brightest radio source in the southern constellation Centaurus and the nearest radiogalaxy to the Milky Way at a distance of 12 million of light years. Radio galaxies are…
A Cosmic Laboratory: Probing particle transport in the archetypal pulsar wind nebula HESS J1825-137
May 2018 Pulsars are fast rotating neutron stars that result from the supernova explosion of a massive star. This fast rotation induces a strong magnetic field, of 108 to 1015 times the magnetic field…
Who are you PKS 0625-354?
April 2018 The extragalactic sky seen at very high energy energies (VHE, E ≥ 100 GeV) in gamma-rays includes about 70 sources, the largest fraction of which are blazars. In the unification model of…
Discovering new Supernova remnants with H.E.S.S.
March 2018 Fig 1: Positions of the new TeV supernova remnant shell candidates (shown in the bottom panels) on the H.E.S.S. Galactic plane survey flux map (HGPS, shown at the center of the top…
A search for dark matter lines towards the inner Galactic halo
February 2018 The presence of dark matter (DM) in the universe is widely supported by a wealth of astronomical observations. One of the key observables is the Cosmic Microwave Background (CMB), produced about 380.000…