J/ApJ/929/L19 Gravitational-wave frequencies between 300-500Hz (Covas+, 2022)
Constraints on r-modes and mountains on millisecond neutron stars in binary
systems.
Covas P.B., Papa M.A., Prix R., Owen B.J.
<Astrophys. J., 929, L19 (2022)>
=2022ApJ...929L..19C 2022ApJ...929L..19C
ADC_Keywords: Gravitational wave; Stars, neutron
Keywords: Gravitational waves ; Neutron stars
Abstract:
Continuous gravitational waves are nearly monochromatic signals
emitted by asymmetries in rotating neutron stars. These signals have
not yet been detected. Deep all-sky searches for continuous
gravitational waves from isolated neutron stars require significant
computational expense. Deep searches for neutron stars in binary
systems are even more expensive, but these targets are potentially
more promising emitters, especially in the hundreds of Hertz region,
where ground-based gravitational-wave detectors are most sensitive. We
present here an all-sky search for continuous signals with frequency
between 300 and 500Hz, from neutron stars in binary systems with
orbital periods between 15 and 60 days and projected semimajor axes
between 10 and 40lt-s. This is the only binary search on Advanced LIGO
data that probes this frequency range. Compared to previous results,
our search is over an order of magnitude more sensitive. We do not
detect any signals, but our results exclude plausible and unexplored
neutron star configurations, for example, neutron stars with relative
deformations greater than 3x10-6 within 1kpc from Earth and r-mode
emission at the level of α∼a few 10-4 within the same distance.
Description:
This search uses the Advanced LIGO O3a data (see 2023ApJS..267...29A 2023ApJS..267...29A and
arXiv:2201.00697). O3a comprises the first 6 months of the O3 run,
i.e., 2019 April-October, and is the first O3 data set publicly
released. We use data from both LIGO gravitational-wave detectors,
i.e., from the Hanford (H1) and the Livingston (L1) detectors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig8.dat 20 40008 Upper limits on the gravitational-wave amplitude
h095%
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See also:
J/ApJ/804/114 : Parameter-estimation performance with LIGO (Berry+, 2015)
J/ApJ/848/L16 : Counterpart of GW170817. I. DECam obs. (Soares-Santos+, 2017)
J/ApJ/906/L14 : LIGO O2; gravitational waves from Scorpius X-1 (Zhang+, 2021)
J/ApJ/924/54 : LIGO/Virgo 3rd observing run (O3) public alerts (Petrov+, 2022)
Byte-by-byte Description of file: fig8.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 Hz Freq [300/500] Frequency
11- 20 E10.5 --- h0-95 [2.7e-25/3.9e-25] Upper limit, h0 (95%)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Mar-2024