k 2021

Where is Love? Tidal deformability in the black hole limit

POSADA AGUIRRE, Nelson Camilo, Cecilia CHIRENTI and Victor GUEDES

Basic information

Original name

Where is Love? Tidal deformability in the black hole limit

Authors

POSADA AGUIRRE, Nelson Camilo, Cecilia CHIRENTI and Victor GUEDES

Edition

RAGtime 23: 6-10 September, 2021 - Workshop on Black Holes and Neutron Stars, 2021

Other information

Language

English

Type of outcome

Prezentace na konferencích

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Organization unit

Institute of physics in Opava

Tags

International impact
Změněno: 14/11/2021 20:22, Ing. Petra Ryšavá

Abstract

V originále

One of the macroscopically measurable effects of gravity is the tidal deformability of astrophysical objects, which can be quantified by their tidal Love numbers. For planets and stars, these numbers measure the resistance of their material against the tidal forces, and the resulting contribution to their gravitational multipole moments. According to GR, nonrotating deformed BHs, instead, show no addition to their gravitational multipole moments, and all of their Love numbers are zero. Here I will discuss different configurations of nonrotating compact and ultracompact objects to bridge the compactness gap between BHs an NSs and calculate their Love number. For the first time we compute the Love number for uniform density ultracompact stars with compactness beyond the Buchdahl limit, and we find that the Love number approaches smoothly to zero as the compactness approaches the Schwarzschild limit. Our results provide insight on the zero tidal deformability limit.