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25 February 2019 | Story Ruan Bruwer
Tharina van der Walt
The hammer thrower Tharina van der Walt is one of several first-class athletes among the first-year students at Kovsies this year. She is the South African U18 champ and record-holder in 2018.

Several top athletes, some of whom were the very best in the country in their respective events at school, have joined Kovsies as first-year students. They already had their first taste of glory as Kovsies when they recently won their events at the first-year meeting.
 
Among these first-years are Jannes Schlebusch (javelin thrower), Joviale Mbisha (sprinter), Colette Uys (discus/shot-put), and Tharina van der Walt (hammer thrower), who have all represented South Africa in the past two years.
 
Schlebusch won the silver medal at the World U18 championships in 2017, but was injured last year. Great things were expected for 2019, but during the first-year meeting he injured his ankle to such an extent that he will have to undergo an operation that would put him on the sideline for the rest of the season.
 
Van der Walt was the South African schools champ in the hammer throw for girls U19 in 2018, when she managed to set up a new school record of 57,83 m. She was ranked fourth at the World U18 champs in 2017. At the same meeting, Mbisha ended 14th in the 100 m.
 
Uys, who participated in the CAA Southern Region Youth and Junior Championships last year, achieved a second place in the discus at the 2018 National Secondary Schools Championships for girls U19. Other first-years who took part in the SA’s last year, are Vicky Oelofse (1 500 m) and Michael Skosana (long jump).
 
They will strengthen Kovsie Athletics, which already boasts a large group of athletes with international experience. Of the 16 athletes who participated internationally last year, only Kesa Molotsane and Lara Orrock will not be in action for the students again.
 
■ Imperium Residence won the men’s division and Arista/Amelia were the ladies’ winners.
 

News Archive

Two scientists part of team that discovers the source of the highest energy cosmic rays at the centre of the Milky Way
2016-03-22

Description: Giant molecular clouds  Tags: Giant molecular clouds

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 gamma rays.
Artist's impression: © Dr Mark A. Garlick/ H.E.S.S. Collaboration

Spotlight photo:
Dr Brian van Soelen and Prof Pieter Meintjes of the UFS Department of Physics.
Photo: Charl Devenish

H.E.S.S. (High Energy Stereoscopic System) scientists publically revealed their latest galactic discovery in the international science journal, Nature, on 16 March 2016. These scientists were able to pinpoint the most powerful source of cosmic radiation – which, up to now, remained a mystery.

Part of this team of scientists are Prof Pieter Meintjes and Dr Brian van Soelen, both in the University of the Free State (UFS) Department of Physics. Dr Van Soelen explains that they have discovered a proton PeVatron – a source that can accelerate protons up to energies of ~1 PeV (10^15 eV) – at the centre of the Milky Way. The supermassive black hole called Sagittarius A has been identified as the most plausible source of this unprecedented acceleration of protons.

The protons are accelerated to Very High Energy (VHE) gamma rays. The energy of these protons are 100 times larger than those achieved by the Large Hadron Collider at CERN (the European Organization for Nuclear Research).

According to Dr Van Soelen, the fact that this research has been published in Nature demonstrates the importance and pioneering nature of the research conducted by H.E.S.S. The H.E.S.S. observatory – operational in Namibia – is a collaboration between 42 scientific institutions in 12 countries.

In 2006, H.E.S.S. was awarded the Descartes Prize of the European Commission – the highest recognition for collaborative research – and in 2010 the prestigious Rossi Prize of the American Astronomical Society. The extent of the observatory’s significance places it among the ranks of the Hubble Space Telescope and the telescopes of the European Southern Observatory in Chile.

“The next generation VHE gamma-ray telescope,” Dr Van Soelen says, “will be the Cherenkov Telescope Array (CTA), which is currently in the design and development stage.” Both Dr Van Soelen and Prof Meintjes are part of this project as well.

H.E.S.S. has issued a complete statement about the paper published in Nature.

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