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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

Judge Ian van der Merwe unanimously re-elected as Chairperson of the UFS Council
2012-11-29

 
Judge Ian van der Merwe
Photo: Rian Horn
29 November 2012

The Council of the University of the Free State (UFS) unanimously re-elected Judge Ian van der Merwe as its Chairperson for the next three years at its last meeting for this year on Friday, 16 November 2012.

Judge Van der Merwe is a Judge of the Free State High Court. He is an alumnus of the UFS and has been a member of the Council since 9 March 2007.

In accepting his appointment, Judge Van der Merwe said that he was honoured and humbled to lead a Council of this calibre for a second term. “The Council is setting a good example of what good governance at a higher education institution should look like. Meetings are conducted in good spirit and decisions made in the best interest of the university,” he said.

“Having sat on councils of many universities before, I can say with great surety that, on balance of expertise and backgrounds, the UFS has one of the most effective councils in the country and, to have a Chairperson of Judge Van der Merwe’s stature, is a privilege. His leadership and guidance is greatly appreciated,” said Prof. Jonathan Jansen, Vice-Chancellor and Rector.

Mr Edward Kieswetter, Group CEO and Executive Director of Alexander Forbes and Deputy Chairperson of the UFS Council, and Mr Jonathan Crowther (former editor of Volksblad) have been re-elected for a further term of four years in the category: "Appointed by the Council".

External Council members were given a tour of the Bloemfontein Campus after the meeting, followed by an induction session for new council members.

New Council members who joined this year are: 

Derek Foster, in the category appointed by the Council
Ruben Gouws, elected by the non-academic staff
Lorraine Kriek, elected by the Alumni
Themba Mmabi, representative of the Minister of Higher
Education and Training
Sabelo Khumalo, SRC President, Qwaqwa Campus
William Clayton, SRC President, Bloemfontein Campus
Suraya Jawodeen, representative of the Minister of Higher
Education and Training
Mr Dan Mosia, representative of the Minister of Higher Education and Training
 

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