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128 papers · 1 filter
Magnetic activity and differential rotation of HIP12653
Amina Boulkaboul, Lotfi Yelles Chaouche, Alessandro C. Lanzafame +1
We present a spectroscopic and photometric study of HIP12653 to investigate its magnetic cycle and differential rotation. Using HARPS archival spectra matched with MARCS-AMBER theo…
CUbesat Solar Polarimeter (CUSP) Sensitivity Estimation and Performance Optimization using Geant4
Abhay Kumar, Giovanni Lombardi, Giovanni De Cesare +45
The CUbesat Solar Polarimeter (CUSP) aims to measure the linear polarization of solar flares in the 25-100 keV X-ray band using a Compton scattering polarimeter. CUSP will allow us…
Four ages of rotating stars in the rotation--activity relationship and gyrochronology
Huiqin Yang, Jifeng Liu, Roberto Soria +4
Gyrochronology and the rotation--activity relationship are standard techniques used to determine the evolution phase.The mismatch in the definition of the evolutionary phases has s…
The stellar population in the SARAO MeerKAT Galactic Plane Survey
Okwudili D. Egbo, David A. H. Buckley, Paul J. Groot +5
We report on optically selected stellar candidates of SARAO MeerKAT 1.3 GHz radio continuum survey sources of the Galactic plane. Stellar counterparts to radio sources are selected…
Gravity's role in taming the Tayler instability in red giant cores
Domenico G. Meduri, Rainer Arlt, Alfio Bonanno +1
The stability of toroidal magnetic fields in radiative stellar interiors is a key open problem in astrophysics. We investigate the Tayler instability of purely toroidal fields $B_ϕ…
Understanding the thermal and magnetic properties of a X-class flare in the low solar atmosphere
F. Ferrente, C. Quintero Noda, F. Zuccarello +1
We analyse the spatial distribution and vertical stratification of the physical parameters of the solar atmosphere when an X-class flare occurs. We made use of observations acquire…