Matheus Aguiar-Kriginsky Silva_Student Presentation

Robert Jarolim_Student Presentation

Galina_Chikunova_Student Presenation

Daniele_calchetti_student_Presentation

Antonio J. Dorantes Monteagudo_Student Presentation

abstract

F. Berrilli, L. Bertello, M. Cantoresi, S. Criscuoli

Reconstruction of the Total Solar Irradiance (TSI) over past epochs requires the evaluation of two major temporal components of solar activity: the quasi-cyclical component due to the 11-year sunspot cycle and the long-term component. We present here an empirical method to separate these components and to estimate the levels of the TSI during the last five centuries, an important information for global or regional climatology studies. We used available historical records of active region area coverage, reproduced by a functional form, and a time series of the Solar Modulation Potential to which we apply the Hilbert-Huang empirical mode decomposition (EMD) algorithm. The main finding of our study is that the estimated TSI values during the Maunder minimum and the present epoch differ by ~ 2.5 W/m2. By using this approach, we are also able to forecast the area coverage of active regions for solar cycle 25.

F. Ferrente, M. Murabito, S. Guglielmino, F. Zuccarello, V. Andretta, I. Ermolli, P. Romano, D. Spadaro, C. Sasso, F. Giorgi

The most conspicuous manifestation of solar magnetism is the emergence of active regions (ARs) in the solar atmosphere. They appear as sunspots and facular regions at the photosphere and also involve all the overlying atmospheric layers. Despite our overall knowledge about the AR formation and evolution, the understanding of a number of fine details of these processes are still missing. In order to investigate aspects related to the AR emergence using high-resolution spectroscopic and spectropolarimetric observations, we have been awarded 10 days of observing time (31 July - 9 August 2023) at the GREGOR solar telescope. In our poster, we will show a preview of the observed targets, relevant to the above mentioned research topics. We will also present coordinated observations taken with Hinode and IRIS.

Decay of a photospheric transient filament at the boundary of a pore and the chromospheric response