Science Meetings

January 2019

University of Oslo | Norway

The kickoff meeting of the WaLSA Team took place at the University of Oslo (Oslo, Norway), between 7-11 January 2019, as a "Rosseland International Team", supported by the Research Council of Norway (project no. 262622). The entirely interactive meeting was aimed at improving scientific knowledge and stumulating new research objectives under the "umbrella topics" listed below, in the field of MHD waves in the lower solar atmosphere. From the challenges raised during the meeting, several new (original) science projects were created.

Challenges in the theory and observations of wave excitation and dissipation mechanisms

Challenges in the spectropolarimetric characterisation of MHD wave modes

Challenges in the use of non-linear and non-stationary analysis techniques

Challenges in the simulations of wave propagation in realistic solar atmospheres

Challenges in the observations of waves along complex solar structures

Challenges related to the design of new instrumentation for wave observations

Solutions to challenges with upcoming DKIST & EST observations

August 2019

Rosseland Centre for Solar Physics | Norway

The second meeting of the WaLSA Team was held at the Rosseland Centre for Solar Physics (RoCS), in Oslo, Norway, during 12-16 August 2019. The meeting was funded by the Research Council of Norway through its centre of excellence, RoCS (project number 262622). In addition to a few allocated “umbrella topics” (listed below), to address other key challenges of the topic, the meeting was mostly dedicated to in-depth discussions of the challenges reviewed in the two meetings, followed by exploring observational data, theory, and models/simulations linked to our ongoing research projects started during, or after, the first team meeting in Oslo.

Challenges in MHD wave modelling and simulation with LARExD, MANCHA, CO5BOLD, Bifrost, and MURaM codes

Challenges in the modelling and observations of MHD shocks

Open problems and identification of research projects linked to MHD waves in sunspots and small magnetic elements

Identification of research projects linked to wave studies with ALMA

February 2020

Chicheley Hall of The Royal Society | UK

The third meeting of the WaLSA Team, held at the Kavli Royal Society Centre, Chicheley Hall (Newport Pagnell, Buckinghamshire, UK), on 10-11 February 2020, focused on presenting results of the research projects identified during the previous meetings in Oslo, including those related to spectropolarimetry and radiative transfer in the optically thick atmosphere. Implications imposed on upcoming next-generation ground-based facilities such as DKIST and EST, alongside space and balloon-borne missions like Solar Orbiter and Sunrise, were also discussed. The meeting was supported by a generous grant from The Royal Society (award no. Hooke18b/SCTM) as a Theo Murphy international scientific meeting (meeting's website).

Waves in the Lower Solar Atmosphere: examining small-scale magnetic elements as a source of waves

HMI observations of MHD waves in the lower solar atmosphere

Multi-fluid effects on chromospheric waves

Wave coupling and heating of expanding flux tubes in the chromosphere

Acoustic-gravity wave propagation characteristics in 3D radiation hydrodynamic simulations of the solar atmosphere

Oscillations observed with ALMA

Properties of local oscillations in lower sunspot atmospheres

Comprehensive MHD simulations of the solar atmosphere from quiet to active Sun

The modelling and interpretation of magnetohydrodynamic wave modes in sunspots and pores

The polarization profiles of Ca ii 854.2 nm in a Quiet Sun simulation

Waves captured by spectropolarimetric IBIS obversations

Two-fluid shocks in an isothermal stratified atmosphere

Waves in the lower solar atmosphere: setting the scene for the next generation of solar telescopes

Next Meeting

International Space Science Institute | Switzerland

The next meeting of the WaLSA Team will be held at the International Space Science Institute (ISSI) in Bern, Switzerland. Pandemic permitting, the meeting will be organised during 2021. The WaLSA Team has been awarded a prestigious grant from ISSI to organise two to three one-week meetings over a period of 12 to 18 months.