Speaker
Description
The MAGIC telescopes are conducting a long-term observational program aimed at discovering new extreme blazars emitting at TeV energies. These sources - also referred to as extremely high-peaked BL Lac objects (EHBLs) - belong to the most energetic subclass of blazars. They are capable of accelerating particles through complex mechanisms within highly efficient relativistic jets that are closely aligned with our line of sight. They represent unique extragalactic laboratories for exploring extreme combinations of particle energies, magnetic fields, and relativistic effects. Their synchrotron emission peaks above keV energies and is then reprocessed to very-high-energy (VHE) gamma rays, often resulting in very hard TeV spectra.
In the last years, the increasing population of extreme blazars has shown emerging spectral properties, which indicate inhomogeneity within this class of sources. Recent studies have also unveiled intriguing differences in the temporal evolution of their spectral emission. These observational evidences pose new challenges to the theoretical interpretation of their energetic emission performed through the current standard acceleration and emission models for blazars, suggesting the need for more complex theoretical frameworks.
In this contribution, we present the latest results from recent MAGIC Collaboration observing campaigns aimed to increase the extreme blazars population at VHE and explore the origin of their extreme properties. Furthermore, we will present the results of the most recent observations, discussing analogies and differences with the known sources, as well as interpretations of their non-conventional spectral emission.
