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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

Middle East activists speak about peace on the Bloemfontein Campus
2012-03-15

 

Bassem Eid (left) and Benjamin Pogrund discuss the situation in the Middle East.
Photo: Johan Roux
15 March 2012

Peace is a big word in the Middle East, particularly amongst Israelis and Palestinians. After years of conflict, people yearn for peace; they want an end to the killings and the uncertainty. The problem is that both sides are actively doing things that undermine the prospect of peace. There is also double talk, lies and evasion with each side pointing fingers. This was the word from Benjamin Pogrund, an Israeli peace activist, addressing staff and students on the Bloemfontein Campus of the University of the Free State. He and fellow peace activist Bassem Eid, a Palestinian, visited the campus to speak about the situation in the Middle East.

Both men agreed that peace efforts were hindered by the Israeli and the Palestinian leaders. According to Pogrund, neither the Palestinians, nor the Israelis are leading the way in accepting that the conflict must end.
 
“Both Israeli and Palestinian leaders say let us get together with no pre-conditions. Then the Israeli leaders say, Jerusalem we cannot share, that is not for negotiation. And, they say to the Palestinians you must recognise Israel as a Jewish state. So, what they say is unless you agree to these pre-conditions there can be no talks without pre-conditions.
 
“And the Palestinians in turn say the settlement construction must cease immediately, and unless that happened, there is no point in meeting. And they say we will never acknowledge you as a Jewish state so do not even bother talking about it. And we insist on the right of return of Palestinian refugees. So they also say unless you acknowledge these pre-conditions there is no point in meeting with our pre-conditions. So as you can gather each side blames the other side, each side points the finger and says you are responsible for the lack of progress.”
 
Pogrund said both the Israelis and the Palestinians could demand legitimacy in that part of the world.
 
“Both Jewish and Arabs can say we have history on our side. We have religion on our side, culture.”
 
To compare Israel to Apartheid South Africa is wrong, he said.
 
“It is an occupation, it is repression, but it is not Apartheid.”
 
Eid, who is the director of the Palestinian Human Rights Monitoring Group, said the Palestinians were close to having a complete independent Palestinian state from 1994 to 1999.
 
“But in one rocket former Israeli Prime minister Ariel Sharon destroyed it.”
 
He said Israel’s disengagement from the Gaza Strip in 2005 did not bring political unity.
 
“We, the Palestinians, were supposed to start building the infrastructure of the Gaza Strip but unfortunately Hamas started dancing on that Israeli disengagement and considered it as their own success because of their military resistance against the occupation.” He also said Hamas is satisfied with its hold in the Gaza Strip and Fatah is also very satisfied with its hold in the West Bank. According to Eid, it is convenient for the Israelis that the Palestinians are separated.

 

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