Objective
In the last century, the discovery of the Sun’s five-minute acoustic oscillations revolutionized our understanding of the solar interior. These oscillations revealed the location of the base of the convection zone and uncovered the Sun’s differential rotation, overturning long-held theories of the solar dynamo. Yet the fundamental question remains: what does the magnetic field look like inside the Sun?
The Sun’s magnetic field, shaped by the interaction of convection and rotation, drives solar activity and space weather. While surface magnetic fields have been measured for over a century, the deep subsurface magnetic field — the engine of the solar dynamo — remains out of reach to acoustic modes.
This project aims to measure the magnetic field deep in the solar interior through inertial-mode helioseismology, a new frontier in solar research pioneered by our group. Inertial modes, recently identified at the solar surface, are low-frequency oscillations whose sensitivity to both rotation and internal magnetic fields peaks deep inside the convection zone. They offer an unprecedented window into the solar dynamo region.
We will develop the observational, theoretical, and computational tools necessary to interpret the frequencies, eigenfunctions, and amplitudes of these modes, enabling us to infer the internal magnetic field throughout the solar cycle. Unlike acoustic modes, some inertial modes are self-excited and will require a treatment of their non-linear interaction with the mean flow and other modes.
By using inertial modes to, for the first time, seismically image subsurface magnetism, we aim to localize regions of magnetic field generation and storage and uncover their dynamical interactions with internal flows. This project will address one of the key remaining observational frontiers in solar physics and open a new chapter in the study of astrophysical dynamos.
Fields of science (EuroSciVoc)
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-ERC - HORIZON ERC Grants
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2025-ADG
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
80539 MUNCHEN
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.