Title：Cracking neutron star mysteries: Physics-driven insights into interior, surface, and exterior

Speaker：Chun Huang 博士（Washington University）

Abstract：The utilization of Pulse Profile modeling techniques could simultaneously provide measurements for Neutron star Mass Radius and offer insights into their hotspot distribution. Presently, these methodologies rely on meta models of the equation of state (EOS) and employ pure geometrical cap overlapping techniques to align with observational data. This presentation aims to showcase our recent results about utilizing a physics-oriented EOS to explore the constraint of X-ray timing observations on fundamental physics parameters governing neutron stars structure.

Furthermore, I will present a Physics-motivated computation of neutron star hotspot temperature maps given by PSR J0030+0451 NICER measurement about its magnetic configuration. This computation reveals tensions between the physics-motivated temperature map and proposed hotspot configurations derived from NICER observation inference and inconsistent with its observation pulse profile itself. This motivate that we need to introduce higher multipole components and integrate them into the current computation to explain the observation data better. In the future, with better instruments like STROBE-X and eXTP, a better understanding of neutron star matter and neutron star hotspot map could be reached, by using these techniques described.

报告时间：2024年7月26日10:00

报告地点：紫台3-302会议室

欢迎大家参加！