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05 April 2021
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Story Dr Nitha Ramnath
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Photo Supplied
Jamba Isaac Ulengo.
François van Schalkwyk and Keenan Carelse, UFS alumni leading the university’s United Kingdom Alumni Chapter, have put their voices together to produce and direct the podcast series. Intended to reconnect alumni with the university
and their university experience, the podcasts will be featured on the first Monday of every month, ending in November 2021. Our featured alumni share and reflect on their experiences at the UFS, how it has shaped their lives, and relate
why their ongoing association with the UFS is still relevant and important. The podcasts are authentic conversations – they provide an opportunity for the university to understand and learn about the experiences of its alumni and to celebrate
the diversity and touchpoints that unite them.
Our podcast guest
Born in the North West town of Vryburg, Ulengo first played provincial rugby at the U16 Grant Khomo Week in 2005. While attending Jim Fouché High School in Bloemfontein, Ulengo was chosen to represent the Free State at various youth levels. As
an up-and-coming player, Ulengo made his break via the FNB Varsity Cup Competition where he starred for the Shimlas, scoring 11 tries in 18 appearances over the three seasons between 2010 and 2012. A short stint with the Free State Vodacom Cup side
saw him make his debut for the Blitzboks (Glasgow 2012), followed by a tournament at the London Sevens in 2014. Ulengo has been a prominent member of the South African Sevens since making his debut for the team in the Scotland leg of the 2011-2012
IRB Sevens World Series. He played in the two final tournaments of that season and then signed a two-year contract with the South African Rugby Union to represent the team in the 2012-2013 and 2013-2014 series. While he only competed at four events
in his first full season, he was involved in seven of the tournaments in his second season.
Ulengo made his return to the sport by signing a contract to play Currie Cup rugby for the Pretoria-based Blue Bulls in 2014 and for their Super Rugby franchise, the Bulls, from the 2015 Super Rugby season.
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
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
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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.