NYU Abu Dhabi researchers find mysterious new set of waves in Sun
Researchers from NYU Abu Dhabi’s (NYUAD) Centre for Space Science have discovered a new set of waves in the Sun that, unexpectedly, appear to travel much faster than predicted by theory.
In the study, ‘Discovery of high-frequency-retrograde vorticity waves in the Sun’, published in the journal Nature Astronomy, the researchers, led by Research Associate Chris S. Hanson, detailed how they analysed 25 years of space and ground-based data to detect these waves. The high-frequency retrograde (HFR) waves, which move in the opposite direction of the Sun’s rotation, appear as a pattern of vortices (swirling motions) on the surface of the Sun and move at three times the speed established by current theory.
The interior of the Sun and stars cannot be imaged by conventional astronomy (e.g. optical, x-ray etc.), and scientists rely on interpreting the surface signatures of a variety of waves to image the interiors. These new HFR waves may yet be an important puzzle piece in our understanding of stars.
Complex interactions between other well known waves and magnetism, gravity or convection could drive the HFR waves at this speed. “If the HFR waves could be attributed to any of these three processes, then the finding would have answered some open questions we still have about the Sun,” said Hanson. “However, these new waves don’t appear to be a result of these processes, and that’s exciting because it leads to a whole new set of questions.”
This research was conducted within NYUAD’s Centre for Space Science in collaboration with the Tata Institute of Fundamental Research (TIFR) and New York University, using NYUAD and TIFR’s computational resources. By studying the Sun’s interior dynamics – through the use of waves – scientists can better appreciate the Sun’s potential impact on the Earth and other planets in our solar system.
“The very existence of HFR modes and their origin is a true mystery and may allude to exciting physics at play,” said Shravan Hanasoge, a co-author of the paper. “It has the potential to shed insight on the otherwise unobservable interior of the Sun.”
If you’ve ever fumbled for a parking ticket while leaving City Walk or queued at a payment machine, those days are over.
Dubai’s popular lifestyle destination has rolled out a barrierless, ticketless parking system, allowing motorists to drive in and out without collecting a ticket or stopping to pay before exiting.
The new system, introduced by Parkin, uses automatic number plate recognition technology to record when vehicles enter and leave the parking facility, making the entire process faster and more convenient.
How the new parking system works
Instead of paper tickets and exit barriers, cameras identify your vehicle when you enter and exit City Walk.
Parking fees are calculated automatically based on the length of your stay.
If you have a Parkin account, the fee is deducted automatically. Visitors without an account, or those with insufficient balance, will receive a payment link to complete the transaction digitally.
The move is part of Dubai’s wider shift towards smart mobility and cashless services.
Parking charges at City Walk
Visitors can still enjoy one hour of free parking at City Walk.
After the complimentary period, parking is charged at:
- Dh5 per hour, or part of an hour.
For visitors heading to The Boulevard, a different tariff applies.
The first 30 minutes are free, after which parking costs Dh20 per hour. According to City Walk, these charges are automatically deducted through the visitor’s Salik account.
How to get free parking
Visitors spending Dh50 or more at participating outlets can receive up to three hours of complimentary parking.
To claim the benefit, shoppers and diners must validate their parking at the participating retailer before leaving.
Parking validation is also available for eligible visitors at attractions including Roxy Cinemas, The Green Planet and selected participating outlets.
Part of a growing smart parking network
City Walk is the latest destination to embrace ticketless parking as Dubai continues expanding digital payment solutions across the city.
Earlier, Parkin announced a five-year agreement with Al Ghurair Centre to introduce a similar smart parking system.
Under that arrangement, visitors receive three hours of complimentary parking before charges apply from Monday to Saturday, while parking remains free on Sundays and public holidays.
With barrierless parking now becoming more common across Dubai, motorists can expect quicker entry and exit, fewer queues and a smoother parking experience, without the hassle of paper tickets.
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