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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

Bloemfontein’s Visser brothers to wow hometown fans
2013-03-27

 

From left: Vincent Visser, Gareth Cliff and Vicus Visser
Photo: Supplied
27 March 2013

South Africa’s YouTube singing sensation, Vicus Visser, will wow Bloemfonteiners on 18 April 2013 with a musical performance at the University of the Free State.

He and his talented brother Vincent will perform at the Wynand Mouton Theatre giving their hometown fans a taste of their recent performances in the United States. Vicus, who has been dubbed Bloemfontein’s Justin Bieber, performed overseas for the first time in February this year when he and his brother performed at events for Black History Month in Washington DC and New York. One of their performances was at the Kennedy Centre in Washington DC where they paid tribute to Nelson Mandela and Martin Luther King.

Vicus rose to fame in 2010 when a music clip of him as a ten year old boy, singing “These Arms” by All for One, appeared on the internet. After a massive seven-year search on social media channels by local and international record companies, he was tracked down to Heidedal in Bloemfontein. Vicus and Vincent moved to Johannesburg in 2012 where they were managed and mentored by Gareth Cliff, top radio presenter and judge on Idols South Africa.

Gareth will join the Visser brothers in Bloemfontein on 18 April and will be master of ceremonies at the concert titled Singing the Dream for South Africa - The Kennedy Centre Performance. As with their performance in the United States, the brothers will treat the hometown crowd to a selection of songs in English, Zulu, Sesotho and Afrikaans.

Vicus, Vincent and Gareth will also make special appearances at the two graduation ceremonies hosted at 09:30 and 14:30 on 18 April 2013. Gareth will be guest speaker and the two brothers will give a short performance. They will also have a meet and greet session with students at the Thakaneng Bridge at 11:45.

Tickets for the Singing the Dream for South Africa - The Kennedy Centre Performance cost R 20 and are available at Room 5, Thakaneng Bridge. The show starts at 19:30.

For more information contact Nicoleen Snyman at snymann@ufs.ac.za or 051 401 9598 / 051 401 9102.


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