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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

International delegates attend SACOMM conference at UFS
2016-10-12

Description: SACOMM conference  Tags: SACOMM conference

From the left: Prof Colin Chasi, Chairperson of the
South African Communications Association,
Dr Dalme Mulder UFS Lecturer; Dr Wilmien Marais,
UFS Lecturer; Prof Johann de Wet, former head of
UFS Department of Communication Science
Prof Tom O’Regan, University of Queensland (Australia)
and Prof Milli Rivera, Head of the UFS Department of
Communication Science during the conference on the
UFS Bloemfontein Campus.
Photo: Rulanzen Martin

Communication from within and below: Social Transformation and Inclusiveness. That was the theme of the 2016 South African Communication Association (SACOMM) conference, hosted at the Bloemfontein Campus of the University of the Free State (UFS) from 3 to 5 October 2016.

“Through this theme, participants were invited to submit papers that examined the role of communication in today’s tumultuous climate,” said Prof Mili Rivera, Head of the Department of Communication Science at the UFS.

A total of 140 delegates from other South African universities, as well as international delegates from Zimbabwe, Nigeria, the United Kingdom, United States, and Australia attended the conference. It was the second time in ten years that the UFS hosted the conference.

Organisation to mentor and support emerging scholars
Various staff members and students from the UFS Department of Communication Science presented papers during the three days.

Annette van Baalen and Dr Dalme Mulder, both lecturers in the department, won the best paper award in the Corporate Communication division. A number of emerging scholars also presented papers. “The organisation is committed to mentoring and supporting emerging scholars in the field of Communication Science,” said Prof Rivera.

Association must be agent of change in curriculum
Delegates discussed the role of the organisation (SACOMM) as an agent of change in terms of decolonising the curriculum. The focus was on training journalists to cover crises in a fair and balanced manner. The book The Art of Persuasive Communication - A Process (4th Edition) by Prof Johann de Wet, former head of the UFS Department of Communication Science, was also launched during the conference.

The next SACOMM conference will take place at Rhodes University in 2017.

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