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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

Meet our Council: Marius Swart – a Councillor with deep roots in the UFS
2017-07-12

Description: Meet our Council: Marius Swart – a Councillor with deep roots in the UFS Tags: Marius Swart, University Council, Mediclinic, cardiothoracic surgeon, Faculty of Health Sciences, Department of Cardiothoracic Surgery  

Marius Swart, Alumni election on the UFS Council.
Photo: Stephen Collett

Marius Swart, a Kovsie alumnus, is an Alumni election on the University Council. Not only is he a Kovsie alumnus, but all four of his siblings and their spouses are Kovsie alumni, as well as all three his children.   

Interest in future decisions at the UFS
He is currently practicing as cardiothoracic surgeon at Mediclinic in Bloemfontein, but has always been involved with the Faculty of Health Sciences at the university.  He spent eight years as consultant in the Department of Cardiothoracic Surgery and recently became a registered student again when he enrolled for an interdisciplinary PhD.  He is currently also supervisor for the research projects of undergraduate medical students.

Thus, Marius no doubt has a substantial interest in the issues and future decisions at the UFS.

Guard against retroformation
"Higher education is a challenging environment and expectations about excellence and human development are being tested.  Transformation is on everybody’s lips, but we have to guard against what I would call retroformation – moving back to old regimes and new forms of exclusion," he says.

Marius is excited to begin his term with a new Rector and Vice-Chancellor.  He realises that many challenges awaits him as councillor on the way forward, but he is ready to pull his weight in Council.

"My own daughter is involved in the challenges students are experiencing on a daily basis, and my wife is supporting a first-generation rural student.  The university should be sensitive to these students.  Empowering them can bring change to communities."

His interests are varied and it is clear that he has a vision for a better world.

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