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26th November 2020
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The registration is closed: 235 participants registered.
The workshop will start on the 1st of December at 13:45 pm ! The workshop will take a fully online format via Zoom. Re-opening of the inscriptions! Re-programmation of the conference, Report of the conference due to the Covid19 epidemic. Publication of the scientific rationale. Building the website. |
Scientific rationale
The Magnetic field awakens in star-formation processes
Understanding the formation of stars is a cornerstone challenge in modern astronomy. This is a highly multi-physics problematic occurring over many orders of magnitude of physical scales from the molecular cloud (a few parsecs) down to the accretion onto the protostar (below 0.1 au).
In particular, the role of the magnetic fields in the context of star formation has been conjectured, and often accounted for. The recent studies led with the Planck satellite have demonstrated that magnetic field is ubiquitous in the interstellar medium and shows a clear association with density gradients, which put them back at the centre of the scientific debate.
In particular, the role of the magnetic fields in the context of star formation has been conjectured, and often accounted for. The recent studies led with the Planck satellite have demonstrated that magnetic field is ubiquitous in the interstellar medium and shows a clear association with density gradients, which put them back at the centre of the scientific debate.
In practice, however, due to the great variety of observational techniques and profusion of physical processes where the role of magnetic fields could be substantial, our community is traditionally subdivided into independent fields of research. All scales and all physical processes are relevant to reach a global understanding of star formation, including:
The role that the magnetic field plays in these processes can be addressed observationally through different and complementary technics that all have their biases and limitations:
This meeting is timely as recent and forthcoming facilities such as the ALMA interferometer, the balloon experiments BLAST-Pol and PILOT, the aeroplane SOFIA/HAWC+, the single dish SCUBA-Pol, and the instrument ESPaDOnS have started to put constraints on magnetic fields at relevant scales. But, above all, we need to get prepared for all the incoming instruments such as SPIRou, NIKA2-POL at IRAM/30m, and more distant projects such as TolTec on the LMT/50m and SKA. They will, all together, revolutionize our view of magnetic fields in the context of star formation. These new observational tools, as well as the development of comprehensive models and numerical simulations, will permit to know where and when the magnetic fields are crucial along the star formation processes. This meeting is the opportunity to synthesize our current knowledge of the magnetic field role on the end-to-end process of star formation and identify the cornerstone questions that shall be addressed in the foreseeable future.
The present program aims at strengthening the links between the various specialized scientific communities, by bringing together experts performing observational experiments, modelling through numerical simulations and theoretical work at different scales.
- the formation of molecular clouds,
- the fragmentation of molecular clouds into filaments and cores,
- the collapse of dense cores and the generation of centrifugally supported disks,
- the transport of the angular momentum from the system protostar/disk,
- the interaction of the magnetosphere with the inner part of the circumstellar disk and the accretion onto the protostar
- the star formation and the building of the stellar magnetic field.
The role that the magnetic field plays in these processes can be addressed observationally through different and complementary technics that all have their biases and limitations:
- the polarized dust thermal emission
- the Zeeman effect
- the Goldreich-Kylafis effect
- the Faraday effect
- the synchrotron emission
This meeting is timely as recent and forthcoming facilities such as the ALMA interferometer, the balloon experiments BLAST-Pol and PILOT, the aeroplane SOFIA/HAWC+, the single dish SCUBA-Pol, and the instrument ESPaDOnS have started to put constraints on magnetic fields at relevant scales. But, above all, we need to get prepared for all the incoming instruments such as SPIRou, NIKA2-POL at IRAM/30m, and more distant projects such as TolTec on the LMT/50m and SKA. They will, all together, revolutionize our view of magnetic fields in the context of star formation. These new observational tools, as well as the development of comprehensive models and numerical simulations, will permit to know where and when the magnetic fields are crucial along the star formation processes. This meeting is the opportunity to synthesize our current knowledge of the magnetic field role on the end-to-end process of star formation and identify the cornerstone questions that shall be addressed in the foreseeable future.
The present program aims at strengthening the links between the various specialized scientific communities, by bringing together experts performing observational experiments, modelling through numerical simulations and theoretical work at different scales.
