Orateur
Description
$\chi$EFT is a powerful framework to construct models for the equation of state of low-density neutron star (NS) matter. However, there are currently only limited probes of NS matter that can reliably be used to test $\chi$EFT and the models it produces. While constraints on bulk NS properties can be inferred from various observables, these properties are mainly sensitive to the NS core, where $\chi$EFT may be inapplicable as exotic phases of matter could appear. Asteroseismology on the other hand allows us to probe lower-density matter within these compact objects, as different normal modes are sensitive to various properties throughout the star. Resonant shattering flares in particular could provide reliable constraints on the frequency of the crust-core interface mode, which is sensitive to the composition of matter around half saturation density. I will examine how measurements of this mode's frequency could be used to infer the equation of state of nuclear matter at sub-saturation densities, and subsequently investigate its use as a test of $\chi$EFT. While reliable measurements of this frequency require the multimessenger detection of gravitational waves alongside a resonant shattering flare, I will also asses short gamma-ray bursts precursor flares identified in the literature under the optimistic assumption that most are resonant shattering flares, providing some early insight into the properties of the interface mode.
