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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 Campus hosts annual HELTASA conference
2014-12-09

 

From the left are: Prof Francois Strydom, Director: Academic - Centre for Teaching and Learning, UFS; Dr Lis Lange, Vice-Rector: Academic, UFS; and Prof George Kuh, Adjunct Research Professor of Education Policy at the University of Illinois.

This year, the privilege to host the annual Higher Education Learning and Teaching Association of Southern Africa (HELTASA) conference was afforded to our university. The event took place on the Bloemfontein Campus from 18 – 21 November 2014, attracting keynote speakers and members from across the world.

HELTASA is a professional association mainly for educators and significant role players in higher education institutions. With its inception in the early 2000s, it has grown to become the premier organisation for teaching and learning in Southern Africa, Dr Amanda Hlengwa, President of HELTASA, pointed out.

A central concern of this body is issues around success within the tertiary sector. The theme of this year, ‘Accessing success: using evidence for change’ served to focus members’ attention on what works and what does not work – as derived from researched evidence.

In a message from Prof Jonathan Jansen, Vice-Chancellor and Rector of the University of the Free State (UFS), he stressed that the task as university teachers “is not simply cognitive gains that ensure graduation success but also intellectual gains that ensure success in life during and after university studies.”

The conference was led by internationally-acclaimed keynote speakers, namely Prof George Kuh, Prof William Grabe and Prof Fredricka Stoller, as well as our own A1 NRF-rated Prof Malanie Walker.

Prof Kuh is Adjunct Research Professor of Education Policy at the University of Illinois and Chancellor’s Professor of Higher Education Emeritus at Indiana University. In his keynote address, Prof Kuh offered valuable lessons from the field to promote student success.

Profs Grabe and Stoller collectively presented the second keynote address that explored how to set up students for success through strategic-reader training. Prof Grabe is Regents’ Professor of Applied Linguistics and Vice President for Research at Northern Arizona University. Prof Stoller is a Professor of English at Northern Arizona University, where she teaches in the MA-TESL and PhD in Applied Linguistics programmes.

Prof Walker is a Senior Research Professor at the UFS Centre for Research on Higher Education and Development (CRHED). She is also currently Director of Research Training and a senior researcher in the EU-funded Marie Curie EDUWEL project. In her keynote address, Prof Walker looked at well-being and agency in higher education.

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