Σας ενημερώνουμε για τη διάλεξη που θα πραγματοποιηθεί στα πλαίσια του Μεταπτυχιακού Προγράμματος Σπουδών, Προχωρημένες Σπουδές στην Φυσική, του Τμήματος Φυσικής, την Πέμπτη 26/11/2020 και ώρα 14:00 από τον Dr Dave Tsang, Επικ. Καθηγητή του Πανεπιστημίου του Bath (Ηνωμένο Βασίλειο). Η ομιλία θα πραγματοποιηθεί στην Αγγλική γλώσσα μέσω zoom.
Ακολουθούν ο τίτλος, η περίληψη και ο σύνδεσμος του zoom για την ομιλία.
Ημερομηνία: Πέμπτη 26/11/2020
Ώρα: 14:00
Title: "Neutron Star Resonant Shattering Flares as Multimessenger Probes of Nuclear Physics"
Speaker: Dr Dave Tsang, University of Bath, UK
Summary: Neutron stars contain the most extreme physical matter in the universe, and provide a probe of physics inaccessible to normal terrestrial experiments. The recent success of the LIGO/Virgo gravitational-wave observatories have begun a new era of mutlimessenger observations of neutron star mergers which promise to provide new insights into neutron star physics. Resonant Shattering Flares (RSFs) can occur during the gravitational-wave driven inspiral, when the tidal forcing frequency due to a neutron star's compact companion matches the resonant frequency of the crust-core interface mode, causing the crust to shatter and induce a gamma-ray flare. These RSFs are relatively isotropic and can be observed as precursors to short gamma ray bursts (SGRBs), or as orphan RSFs when the relatively narrow SGRBs are beamed away from the observer. If an RSF can be detected with coincident timing of the gravitational-wave chirp, this can be used to precisely determine the asteroseismic frequency of the core/crust interface-mode, allowing us to provide competitive constraints on nuclear physics parameters, such as the symmetry energy at nuclear saturation and its derivatives. For particular nuclear physics models, this can provide constraints that are significantly tighter than those provided by current experiments.
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Zoom Link: https://upatras-gr.zoom.us/j/92735621210?pwd=Zk15UVZLTFo3QUhIbGlFUmNJN2N...