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Prospects for detecting gravitational waves at 5 Hz with ground-based detectors

Yu, Hang, Martynov, Denis, Vitale, Salvatore, Evans, Matthew, Shoemaker, David, Barr, Bryan, Hammond, Giles, Hild, Stefan, Hough, James, Huttner, Sabina, Rowan, Sheila, Sorazu, Borja, Carbone, Ludovico, Freise, Andreas, Mow-Lowry, Conor, Dooley, Katherine, Fulda, Paul, Grote, Hartmut and Sigg, Daniel 2018. Prospects for detecting gravitational waves at 5 Hz with ground-based detectors. Physical Review Letters 120 , 141102. 10.1103/PhysRevLett.120.141102

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We propose an upgrade of Advanced LIGO (aLIGO), named LIGO-LF, that focuses on improving the sensitivity in the 5-30 Hz low-frequency band, and we explore the upgrade’s astrophysical applications. We present a comprehensive study of the detector’s technical noises, and show that with the new technologies such as interferometrically-sensed seismometers and balanced-homodyne readout, LIGO-LF can reach the fundamental limits set by quantum and thermal noises down to 5 Hz. These technologies are also directly applicable to the future generation of detectors. LIGO-LF can observe a rich array of astrophysical sources such as binary black holes with total mass up to 2000 M�. The horizon distance of a single LIGO-LF detector will be z ' 6, greatly exceeding aLIGO’s reach. Additionally, for a given source the chirp mass and total mass can be constrained 2 times better, and the effective spin 3-5 times better, than aLIGO. The total number of detected merging black holes will increase by a factor of 16 compared with aLIGO. Meanwhile, LIGO-LF will also significantly enhance the probability of detecting other astrophysical phenomena including the gravitational memory effects and the neutron star r-mode resonances.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0031-9007
Date of First Compliant Deposit: 5 April 2018
Date of Acceptance: 2 March 2018
Last Modified: 25 Apr 2018 12:27

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