With the advent of gravitational wave astronomy\, our view of the universe has expanded to new and exciting frontiers. One especially promising avenue to explore in fundamental phys ics through gravitational waves is probing dense nuclear matter contained in neutron stars\; observations of gravitational waves sourced by these ex tremely compact objects allow one to study matter in regimes that we could never replicate on Earth. Compact stars contain finite-size effects\, suc h as tidal deformations\, which leave imprints on the gravitational wave s ignal that describe the internal stellar structure\, so studying such effe cts is crucial to expanding our understanding of matter at the most extrem e scales. In this seminar\, I shall describe how tidal fields in magnetar systems (neutron stars with incredibly strong magnetic fields) can lead to an interesting interplay between tidal fields and magnetic fields. This i nteraction is encapsulated in how the tidal field changes the magnetic pro perties of the star and\, in turn\, in how the magnetic field of the star changes its tidal deformability properties. I shall also outline an effect ive field theory formalism to study tidal fields alongside the conventiona l general relativity formalism. This effective field theory approach prove s to be a natural arena to identify features of this system which can be d ifficult to study with the usual spacetime geometric approach alone.

\n DTSTART:20240401T173000Z LOCATION:Zoom and in-person\, Room 323\, JBL SUMMARY:Gravitational and Electromagnetic Love Numbers of Magnetar Systems: an Effective Field Theory Approach END:VEVENT END:VCALENDAR