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The power of Faraday Tomography
2018-05-28 to 2018-06-02
Miyazaki, Japan
Magnetic fields play vital roles on all scales throughout the Universe: allowing the creation of stars and exoplanets, affecting the gas flows in the interstellar medium, forming galactic and AGN jet structures, and permeating the cosmic web such as galaxy clusters. Yet the origin of these cosmic magnets and the mechanisms of field amplification/ordering over the history of the Universe are still largely unsolved. “Cosmic Magnetism” is recognized as one of the key science topics for largest radio facilities such as the Low-Frequency Array (LOFAR), the Karl G. Jansky Very Large Array (VLA), and Atacama Large Milimeter/submilimeter Array (ALMA), as well as the SKA and its precursors, Murchison Widefield Array (MWA), Hydrogen Epoch of Reionization Array (HERA), the Australian SKA Pathfinder (ASKAP), and MeerKAT. We are now entering the era of largest facilities, which are expected to uniquely solve many outstanding questions in cosmic magnetism. Theoretical and numerical predictions will become much more important in this era. One of the breakthroughs given by such modern radio telescopes is wide bandwidth in frequency. It improves, for example, the sensitivity, the spectral index estimation, and depolarization analysis. Moreover, it brings us an innovative data analysis method called Faraday tomography. Here, wide frequency coverage means “big data” challenge; a computational cost is another issue, and it should be resolved by the time when the future largest projects run. Part of the organizers, the Japan SKA Consortium (SKA-JP) Cosmic Magnetism Science Working Group, has addressed the capability of Faraday tomography (see, http://arxiv.org/abs/1603.01974, https://arxiv.org/abs/1709.02072). The organizers recently had an opportunity to make a collaboration between the SKA-JP and the Netherlands group, and share the same minds to the problems described above. We hold here the workshop to review the current status and future prospects of Faraday tomography, combining astronomical observations, numerical simulations, and astrophysical theories. We also pay a special attention to a new astronomical messenger, fast radio burst (FRB). The organizers intend to host an interactive and friendly workshop rather than a formal conference. Therefore, instructive lectures from senior researchers and interim reports from young scientists are both welcomed. During the meeting, young peoples are strongly encouraged to collaborate with senior researchers and/or young researchers from different disciplines. We hold tutorials of polarization analysis using AIPS and of Faraday Tomography. The aim of these tutorials is to educate young researchers for the progress of future radio astronomy and to popularize the concept of Faraday Tomography. We welcome participation to these tutorials of senior researchers who would like to study as well as young researchers.

http://ska-jp.org/ws/SKAJP_MAGWS2018/index.htmlexternal link

Cosmology and the Quantum Vacuum 2018
2018-09-02 to 2018-09-08
Spain, Greece, Romania

This V Edition of the Workshop will focus, as the preceding ones, which took place in Benasque (twice), Rhodes, and Segovia, on aspects of Theoretical Cosmology that are related with properties of the Quantum Vacuum. The longstanding question: Why we do not see vacuum fluctuations at cosmological scale? is still without answer. Now we have indeed detected an acceleration in the cosmic expansion which could be most easily understood as a vacuum effect (dark energy), but the numbers still do not match by many orders of magnitude. Alternative approaches to this problem involve cosmological models which modify the Einstein-Hilbert Lagrangian by adding terms of higher order in the curvature. Terms of this kind should probably be there, since they appear in most attempts of calculating quantum corrections to General Relativity. At this stage, however, modified gravity models should be confronted both with fundamental theories and with the most recent astronomical data.

The Workshop is open to related topics. This includes:

1. Cosmological models: modified gravities, f(R) and similar theories, non-local models.
2. Quantum vacuum effects and its implications in cosmology. Casimir effect in brane models.
3. The cosmological constant problem and quantum vacuum fluctuations.
4. Mathematical physics techniques for quantum vacuum effects.

http://benasque.org/2018vacuum/external link

The Eighth East Asian Numerical Astrophysics Meeting (EANAM 2018)
2018-10-22 to 2018-10-26
National Cheng-Kung University (NCKU), Tainan, Taiwan
Numerical simulations have become even more important as detailed comparisons between theories and observations are now possible at a deeper level in most fields of astrophysics. The aim of this series of meetings is to bring (but not limited to) East-Asian numerical astrophysicists together and provide chances to learn each other's work and explore possible collaborations among them. The scope of the meeting will encompass all major astronomical research fields that involve numerical simulations, including (but not limited to) cosmology, astronomical hydrodynamics, magnetohydrodynamics, radiative transfer, particle acceleration, and planetary / stellar / galactic dynamics. In addition, there will also be a focus on computer science applications directed toward astrophysics including numerical methods, simulation data analysis, high performance computing, and optimization for use on large scale computer clusters. Participants from outside of the East Asia are warmly welcome as well.

http://events.asiaa.sinica.edu.tw/conference/20181022/index.phpexternal link