Recent advances in Solar Physics in Argentina

CREMADES, H.

Ushuaia

Congreso; Space Weather observations throughout Latinamerica: Filling the Southern Gaps; 2023

Investigations relevant to solar-terrestrial relations in Argentina started in the beginning of the XX century, together with the first systematic observations of sunspots and faculae. Throughout the decades, though not without adversities, Solar Physics has consolidated in the country, leading to state-of-the-art studies led by local researchers, at times also in collaboration with foreign colleagues. Nowadays, the research topics focus on phenomena and processes taking place from the outermost layers of the solar interior until the solar atmosphere and the interplanetary medium, covering various scales of space and time. The study of magnetic structures associated to active regions and their evolution is aimed at understanding the energy involved in eruptive events such as flares and coronal mass ejections, and the destabilization mechanisms behind them, as well as the genesis of solar magnetic fields. The analysis of various aspects of coronal mass ejections and related phenomena addresses their origins and evolution with space weather implications. Application of solar tomography techniques to visible light and EUV images of the inner solar corona for reconstruction of its 3D distribution of electron density and temperature, enables global validation of state-of-the-art 3D-MHD models of the corona and solar wind used for space weather prediction. On the numerical modeling side, the addressed science objectives include the analysis of quasi periodic pulsations through oscillations of coronal loops and filaments, supra-arcade downflows, and cut-off frequencies of magnetoacustic waves throughout the transition region and corona. In this talk I briefly review these recent and ongoing research efforts, with contributions from the scientists leading them.