Search for Continuous Gravitational Waves from Unknown Neutron Stars in Binary Systems with Long Orbital Periods in O3 Data

被引：2

作者：

Covas, P. B. ^{[1
]}

Papa, M. A.

Prix, R.

机构：

[1] Albert Einstein Inst, Max Planck Inst Grav Phys, D-30167 Hannover, Germany

来源：

ASTROPHYSICAL JOURNAL | 2025年 / 985卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

ALL-SKY SEARCH; MARKOV MODEL TRACKING; LIGO; SIGNALS;

D O I：

10.3847/1538-4357/adcc2b

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gravitational waves emitted by asymmetric rotating neutron stars are the primary targets of continuous gravitational-wave searches. Neutron stars in binary systems are particularly interesting due to the potential for nonaxisymmetric deformations induced by a companion star. However, all-sky searches for unknown neutron stars in binary systems are very computationally expensive, and this limits their sensitivity and/or breadth. In this paper we present results of a search for signals with gravitational-wave frequencies between 50 and 150 Hz, from systems with orbital periods between 100 and 1000 days and projected semimajor axes between 40 and 200 lt-s. This parameter space region has never been directly searched before. We do not detect any signal, and our results exclude gravitational-wave amplitudes above 1.25 x 10-25 at 144.32 Hz with 95% confidence. Our improved search pipeline is more sensitive than any previous all-sky binary search by about 75%.

引用

页数：10

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