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Submit your Research - Make it Global NewsNYU Abu Dhabi Leads Groundbreaking Solar Research
Researchers at New York University Abu Dhabi (NYUAD) have made a pivotal discovery in solar physics, identifying previously undetected large-scale waves propagating deep within the Sun. These global-scale waves, influenced by the star's internal magnetic fields, challenge existing models of solar dynamics and open new avenues for understanding the Sun's behavior.
The Sun, our nearest star, is a dynamic ball of plasma where convection, rotation, and magnetism interact in complex ways. Traditional observations are limited by the opaque solar surface, but helioseismology— the study of solar oscillations akin to earthquakes on Earth—allows scientists to probe its interior. NYUAD's Center for Astrophysics and Space Science (CASS) leveraged over a decade of data from NASA's Helioseismic and Magnetic Imager (HMI) aboard the Solar Dynamics Observatory to reveal these elusive waves.
Decoding the Sun's Hidden Magnetic Architecture
Helioseismology works by analyzing sound waves generated throughout the Sun that travel through its interior and emerge at the surface. These p-modes, or pressure waves, carry information about density, temperature, and motion layers deep below. The NYUAD team focused on radial vorticity patterns—swirling motions—in equatorial symmetric sectors, using normal mode-coupling analysis to detect subtle signatures.
The discovered waves are magnetically modified Rossby waves, also known as r-modes. Rossby waves (full name: Carl-Gustaf Arvid Rossby waves) are planetary-scale inertial waves arising from the Coriolis effect in rotating fluids. In hydrodynamic form, they propagate retrograde relative to rotation, but magnetism alters their dispersion relation, producing a dominant slow mode and a weaker retrograde fast mode. Confined to near-surface layers (r/R_⊙ ≲ 0.98), these waves resonate at frequencies implying a toroidal magnetic field strength of approximately 5√(ρ/ρ_S) Gauss, where ρ_S is surface density. At the convection zone base, this equates to about 5,000 Gauss, aligning with prior helioseismic inferences.
This magnetic imprint provides direct evidence of large-scale toroidal fields theorized to drive the solar dynamo—the process generating the Sun's 11-year activity cycle, sunspots, flares, and coronal mass ejections (CMEs).
Spotlight on Key Researchers Driving Innovation
Lead author Shravan Hanasoge, co-Principal Investigator at CASS and affiliated with Tata Institute of Fundamental Research, brings expertise in helioseismology and computational astrophysics. His collaborator, Christopher Hanson, Research Scientist at NYUAD CASS, specializes in solar interior imaging. Their combined efforts represent a synergy between UAE-based and international talent.
"These waves give us a unique look at the Sun’s hidden magnetic system," Hanasoge stated. "Understanding these internal processes is crucial for predicting solar activity, which can impact satellites, communications, and power systems on Earth."
NYU Abu Dhabi's Center for Astrophysics: A UAE Research Powerhouse
Established as a merger of prior centers, CASS spans Sun and stellar physics to cosmology. In solar research, it tackles convection, inertial waves, and space weather. NYUAD ranks as the top research university in the UAE per multiple metrics, including Times Higher Education (27th globally) and QS Employability Rankings. With 93% of faculty holding PhDs from top institutions, CASS attracts global talent, supported by NYUAD Research Institute funding.
NYUAD's PhD in Astrophysics and Space Systems, the region's first, prepares students for academia and UAE's burgeoning space sector, aligning with national visions like UAE Centennial 2071.
Revolutionary Methods Powering the Discovery
The team processed HMI and GONG++ data from 2010–2024, computing vorticity spectra and comparing to magneto-Rossby dispersion theory. This revealed modes weaker than pure hydrodynamic Rossby waves but distinctly magnetic. Step-by-step: (1) Track surface oscillations; (2) Invert for interior vorticity; (3) Couple modes to isolate global scales; (4) Fit theoretical curves to data for field strength.
- Equatorially symmetric analysis minimized noise.
- Power spectra showed resonances at predicted frequencies.
- Radial confinement confirmed near-surface origin.
Implications for Space Weather and Global Security
Solar eruptions disrupt GPS, aviation, and grids—events like the 1859 Carrington Event cost billions today. These waves map deep magnetism, enabling dynamo models for cycle forecasts. For UAE, with Mohammed bin Rashid Space Centre (MBRSC) and Hope Mars Mission, enhanced predictions safeguard assets.Read the full study in Nature Astronomy.
Beyond Sol, insights apply to stellar magnetism, exoplanet habitability.
Building UAE's Higher Education Excellence in STEM
This discovery elevates UAE universities globally. NYUAD's 1,000+ publications place it #1 UAE for research impact. Ties to UAE space program—Emirates Mars Mission support—foster collaborations. PhD programs train Emiratis, boosting GDP via knowledge economy.
Legacy of Solar Innovations from CASS
Prior feats: 2022 high-frequency retrograde waves defying theory; 2024 supergranule convection challenging mixing-length; AI solar wind forecasts (45% accuracy gain). CASS's track record positions NYUAD as UAE leader.
Stakeholder Perspectives and UAE Context
UAE's space investments (AED 20B+ sector) amplify such research. MBRSC partnerships enhance national capabilities. Students gain hands-on helioseismology, preparing for jobs in space agencies, tech firms.
Future Outlook: Probing Deeper into Stellar Mysteries
Next: Refine field maps with Parker Solar Probe data; extend to other stars via asteroseismology. NYUAD plans expanded CASS facilities, PhD cohorts. Actionable: UAE universities invest in compute clusters for simulations.
Career Opportunities in UAE Astrophysics
With UAE's space push, roles abound: postdocs, faculty at NYUAD/UAEU, MBRSC analysts. Skills in helioseismology, AI modeling in demand. Explore UAE higher ed jobs for research positions.
Photo by Nikola Tasic on Unsplash
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