Project description
Uncovering the radio emission mechanisms of neutron stars
Neutron stars are fascinating environments characterised by extreme magnetic fields, relativistic processes and quantum effects, making them unique natural laboratories for plasma physics. Their coherent radio emissions offer valuable information, yet the exact mechanisms behind these emissions remain unclear. With the support of the Marie Skłodowska-Curie Actions programme, the AMPER project aims to uncover how specific processes, such as pair-creation events and propagating kinetic Alfvén waves in neutron star magnetospheres, produce coherent radio emissions in pulsars and fast radio bursts. By combining particle-in-cell simulations with radio wave analysis, the proposed research will help predict radio emission properties such as power, spectrum and polarisation. Project findings should help enhance understanding of neutron stars and improve models for interpreting their radio signals.
Objective
Magnetospheres of neutron stars (NSs) represent unique plasma-physics labs of extreme environments characterized by ultra-high magnetic field strengths, relativistic processes, and the presence of quantum electrodynamic effects – parameters far unreachable on the Earth. Detailed information on these processes comes to us via coherent radio emissions of pulsars and possibly fast radio bursts (FRBs), being observed by fast-developing sophisticated instruments of radio astronomy like FAST, CHIME, ALMA, and in near future, SKA. However, no agreement has been reached on their exact coherent radio emission mechanism that can interpret the observations, mainly because the modeling of the radio emissions requires operation of the extreme-physical processes and simultaneous consideration of the wave coherency at plasma kinetic micro-scales.
This project addresses the question of which specific mechanisms are responsible for coherent radio emissions of NSs; in detail, which qualitative radio emission properties of pulsar pair-creation events and propagating kinetic Alfvén waves in the magnetospheres of NSs can lead to the interpretation of pulsars and transient events like fast radio bursts. The mechanisms will be investigated by combination of my expertise in first-principle particle-in-cell simulations of the micro-kinetic instabilities with the long-term experience in advanced dispersion and coherency analyses of radio waves in the simulations at the host institute.
This combination of skills will allow me to make predictions on coherent properties of radio waves in terms of their total power, luminosity spectrum, its directivity and polarization as they escape the emission sources. I will distinguish, for the first time, how the extreme plasma instabilities lead to the coherent and incoherent radio emissions of pulsars and FRBs. After the project, the obtained properties can be utilized in radiative transfer codes to get specific predictions on NS radio observables.
Fields of science (EuroSciVoc)
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CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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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)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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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.
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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-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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(opens in new window) HORIZON-MSCA-2024-PF-01
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25165 Ondrejov
Czechia
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