Directed search for continuous gravitational waves from the possible kilonova remnant G4.8+6.2
Yu Liu and Yuan-Chuan Zou
Submitted on 5 November 2022
G4.8+6.2 was proposed as a possible kilonova remnant associated with the Korean guest star of AD 1163 in our Milky Way galaxy. Its age is about 860 years according to the historical record. If a neutron star was left in the center of G4.8+6.2, this young neutron star may radiate strong continuous gravitational waves, which could beat the indirect age-based upper limit with current LIGO sensitivity. In this work, we searched such continuous gravitational waves in the frequency band
. This search
used two days of LIGO O3b data from the Hanford and Livingston detectors. While
no signal was found, we placed upper limits on the gravitational wave strain.
For comparison we also showed the latest results of all-sky searches obtained
with various search pipelines. With upgrading of the LIGO detectors, it will
provide the opportunity to see whether a black hole or a neutron star is
harbored inside G4.8+6.2.
Comment: 8 pages, 6 figures, 1 tables, Accepted for publication in Physical Review D
Subjects: Astrophysics - High Energy Astrophysical Phenomena; General Relativity and Quantum Cosmology