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05 November 2024 | Story Leonie Bolleurs | Photo Supplied
BOOTES-6 telescope station
The BOOTES-6 telescope station captured a South African sighting of the southern lights, a rare atmospheric phenomenon powered by solar activity.

The northern lights, with their vibrant displays of green, pink, and violet hues, have become a famous attraction in Nordic countries. But in early October, a rare sighting of the southern lights – or aurora australis – was reported in South Africa, surprising many.

Prof Pieter Meintjes, Professor in the Department of Physics at the University of the Free State (UFS), explains that both the northern and southern lights are the result of charged particles from coronal mass ejections (CMEs) on the sun, which are captured by Earth’s magnetic field. "The interaction between magnetic fields and charged particles, such as protons and electrons, is very interesting. The magnetic field forces these particles to spiral around the field lines, ultimately guiding them towards the magnetic poles. As these particles enter Earth’s atmosphere, they collide with atmospheric atoms, causing a beautiful glow. The colours of the aurora indicate which atoms are involved. Typically, hydrogen shines red, while oxygen and nitrogen produce a greenish-blue tinge," he says.

Observing the southern lights

When the display occurs above the northern magnetic pole, it is called the aurora borealis (northern lights) and can typically be observed over regions such as Alaska, Greenland, and the Nordic countries. Above the southern magnetic pole, it is known as aurora australis (southern lights), usually visible over places such as Antarctica and New Zealand. “In extreme cases – when gigantic mass ejections occurred – it can also be observed in mid-latitudes such as South Africa,” says Prof Meintjes.

This recent and rare South African sighting was also captured by the BOOTES-6 telescope station at Boyden Observatory, located just outside Bloemfontein. According to Prof Meintjes, the telescope station has an all-sky monitor – a camera constantly watching the sky for changes and monitoring, among others, cloud cover to ensure that the telescope is always safe from weather. While the monitor was taking photos of the night sky, Prof Alberto Castro-Tirado, a research professor at the Institute of Astrophysics of Andalusia in Spain, picked up the aurora.

The Institute of Astrophysics of Andalusia in Spain, in collaboration with the University College Dublin (UCD), is partnering with the UFS in a research-driven initiative involving the BOOTES-6 telescope station, installed in 2022 during the COVID-19 pandemic. Under a Memorandum of Understanding that was recently renewed for another five years, the UFS and UCD share approximately 30% of the telescope's observing time dedicated to UFS research.

“The DPRT telescope (Dolores Pérez-Ramírez telescope), named after a Spanish astronomer and lecturer at the University of Jaén, contributes significantly to our research, with publications resulting from contributions made by the telescope station and collaborators on gamma-ray bursts, occultations, and transient events co-authored by me and a colleague in the department, Dr Hendrik van Heerden,” notes Prof Meintjes.

Research-driven initiatives

Data from the telescope station is also used for their in-house projects and contributes significantly to the work of their PhD students that will be submitted in the next few years. This includes the PhD work of Helene Szegedi, who uses data from the BOOTES-6 telescope station to study cataclysmic variable systems – compact binaries that erupt regularly. Another PhD student, Joleen Barnard, studies blazar variability under the guidance of Prof Brian van Soelen. Blazars, explains Prof Meintjes, are the core of distant galaxies powered by supermassive black holes. These cosmic jets are pointed towards Earth, but fortunately, they are millions or billions of light years away; otherwise, their impact would be devastating to life on Earth.

News Archive

UFS hosts consortium to discuss broadening subcontinent’s food base
2017-03-14

Description: Cactus Tags: Cactus

The Steering Committee of the Collaborative
Consortium for Broadening the Food Base comprises,
from the left: Prof Wijnand Swart (UFS),
Dr Sonja Venter (ARC) and Dr Eric Amonsou (DUT).
Photo: Andrè Grobler

There is huge pressure on the agricultural industry in southern Africa to avert growing food insecurity. One of the ways to address this is to broaden the food base on the subcontinent via crop production. Climate change, urbanisation, population growth, pests and diseases continually hamper efforts to alleviate food insecurity. Furthermore, our dependence on a few staple crops such as maize, wheat, potatoes, and sunflower, serve to exacerbate food insecurity.  

Broadening the food base  
To address broadening the food base in southern Africa, scientists from the University of the Free State (UFS), the Durban University of Technology (DUT) and the Agricultural Research Council (ARC) have formed a Collaborative Consortium for the development of underutilised crops by focusing on certain indigenous and exotic crops. The Consortium met at the UFS this week for two days (6, 7 March 2017) to present and discuss their research results. The Principal Investigator of the Consortium, Prof Wijnand Swart of the Department of Plant Sciences in the Faculty of Natural and Agricultural Sciences, said awareness had risen for the need to rescue and improve the use of orphan crops that were up to now, for the most part, left aside by research, technological development, and marketing systems.  

"Many indigenous southern African
plant grains, vegetables and tubers
have the potential to provide a variety
of diets and broaden the household
food base.”

Traditional crops Generally referred to as alternative, traditional or niche crops, five crops are being targeted by the Consortium, namely, two grain legumes, (Bambara groundnut and cowpea), amaranthus (leaf vegetable), cactus pear or prickly pear and amadumbe (a potato-like tuber). Swart said these five crops would play an important role in addressing the food and agricultural challenges of the future. “Many indigenous southern African plant grains, vegetables and tubers have the potential to provide a variety of diets and broaden the household food base.” The potential of the many so-called underutilised crops lies not only in their hardiness and nutritional value but in their versatility of utilisation. "It may be that they contain nutrients that can be explored to meet the demand for functional foods," said Swart.

Scientific institutions working together
The Collaborative Consortium between the three scientific institutions is conducting multi-disciplinary research to develop crop value chains for the five underutilised crops mentioned above. The UFS and ARC are mainly involved in looking at production technologies for managing crop environments and genetic technologies for crop improvement. The DUT is focusing on innovative products development and market development.  

 

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