Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
學年 111
學期 1
出版（發表）日期 2022-09-21
作品名稱 Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
作品名稱（其他語言）
著者 Liu, Guo-qing
單位
出版者
著錄名稱、卷期、頁數 Phys. Rev. D 106(6),　062002
摘要 Results are presented for a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin wandering. This search improves on previous HMM-based searches of Laser Interferometer Gravitational-Wave Observatory data by including the orbital period in the search template grid, and by analyzing data from the latest (third) observing run. In the frequency range searched, from 60 to 500 Hz, we find no evidence of gravitational radiation. This is the most sensitive search for Scorpius X-1 using a HMM to date. For the most sensitive subband, starting at 256.06 Hz, we report an upper limit on gravitational wave strain (at 95% confidence) of h95%0=6.16×10−26, assuming the orbital inclination angle takes its electromagnetically restricted value ι=44°. The upper limits on gravitational wave strain reported here are on average a factor of ∼3 lower than in the second observing run HMM search. This is the first Scorpius X-1 HMM search with upper limits that reach below the indirect torque-balance limit for certain subbands, assuming ι=44°.
關鍵字 Binary stars;Neutron stars & pulsars
語言 zh_TW
ISSN 2470-0029
期刊性質 國內
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124299 )