[2025-01-18] For better promotion of the events, the categories in this system will be adjusted. For details, please refer to the announcement of this system. The link is https://indico-tdli.sjtu.edu.cn/news/1-warm-reminder-on-adjusting-indico-tdli-categories-indico

24–26 Sept 2025
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Probing Intrinsic Ellipticity in Neutron Star Binaries

26 Sept 2025, 15:10
20m
N400 (Tsung-Dao Lee Institute)

N400

Tsung-Dao Lee Institute

Speaker

Zhiqiang Miao (TDLI)

Description

Gravitational-wave astronomy has entered the era of precision modeling, where spin precession, tidal effects, and high-order relativistic corrections are routinely included in waveform analyses. Beyond these well-studied ingredients, it is important to assess rarer phenomena that may nevertheless carry profound physical implications. In this talk, I will present a potentially powerful effect—spin–orbit resonance locking in NSBH and BNS inspirals. Such locking can occur if the neutron star has finite ellipticity, arising from, for example, strong internal magnetic fields, a solid quark core, or other exotic structures.
I will discuss the capability of Advanced LIGO and next-generation observatories to detect such extreme events. A detection would have rich physical implications: measuring the ellipticity would provide direct evidence for magnetars in binaries and allow inference of their internal magnetic fields; offering the most precise way to measure the neutron star moment of inertia, which enables stringent constraints on the dense-matter equation of state, unique tests of general relativity (via the I–Love relation), and even test of exotic compact objects (ECOs).

Session Selection Astronomy and Astrophysics

Primary author

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