11 years later: Discovery of a Cosmic PeVatron in the Galactic Center
April 2016 Fig. 1: Artist’s impression of the giant molecular clouds surrounding the Galactic Centre, bombarded by very high energy protons accelerated in the vicinity of the central black hole and subsequently shining in…
Dark Matter Search In The Inner Galactic Halo: An Update With Ten Years Of Data
March 2016 Fig. 1: Projected dark matter density of a Milky Way-like galaxy from the cosmological N-body simulation Aquarius. The brightness of the image is proportional to the logarithm of the squared dark matter…
The fifth gamma-ray shell: Resolving the historic supernova remnant RCW 86/SN 185
February 2016 X-ray image of the supernova remnant shell RCW 86, left over from a giant star explosion that took place AD 185. Blue colour denotes regions which glow in non-thermal (hard) X-rays, whereas…
Ten Years Later: The Completed TeV Galactic Plane Survey
Happy New Year from the H.E.S.S. Collaboration and welcome back to the H.E.S.S. Source of the Month blog! Each month, we will feature one of the latest ground-breaking discoveries from the H.E.S.S. Collaboration. We’re…
HESS J1640−465 – an exceptionally luminous TeV gamma-ray supernova remnant
September 2013 Composite image showing radio continuum emission at 610 MHz (in blue) from the region around HESS J1640-465 / SNR G338.3−0.0, and infrared emission at 8 μm (in green) and at 24 μm…
A photon is a photon is an axion is a photon
August 2013 Illustration of gamma-ray propagation in the presence of oscillations between gamma rays and axion-like particles, in the intergalactic magnetic fields. Photon-to-axion oscillations (or vice-versa) are represented by a crooked line, while the…
The source HESS J1356-645 associated with the young and energetic pulsar PSR J1357-6429
July 2013 1.4 GHz radio signal of the pulsed emission of pulsar PSR J1357−6429, measured with the Parkes radio telescope ( S. Johnston et al.). Pulsar wind nebulae – multi-lightyear-sized bubbles of high-energy electrons…
Very high energy gamma rays from the other side of the Milky-Way: SNR G349.7+0.2
June 2013 The remnant G349.7+0.2 seen in X-rays with Chandra (Lacendic et al. 2000). The crosses show locations of OH maser emission, indicative of interaction of the expanding remnant with a molecular cloud (see…
HESS J1427-608 and – finally – its X-ray counterpart
May 2013 Discovery image of of HESS J1427-608, from Aharonian et al. 2008. The gamma-ray excess at the right of the image is the hard X-ray source known as the Kookaburra/Rabbit. The very high…
Disentangling TeV emission in complex regions: the Scutum arm tangent
April 2013 Composite image of the source C region of HESS J1843-033: in red the radio image (from the VLA survey) showing a radio-galaxy candidate and a small fraction of a putative supernova remnant…