Searches for low-frequency bursts of gravitational radiation

1985 ◽  
Vol 28 (10) ◽  
pp. 938-939 ◽  
Author(s):  
Vladimir B Braginskiĭ ◽  
A V Gusev ◽  
V P Mitrofanov ◽  
V N Rudenko ◽  
V N Yakimov
Keyword(s):  
Gravitational Radiation ◽  
Low Frequency

scholarly journals Low Frequency Gravitational Waves in Cosmology

1974 ◽  
Vol 63 ◽  
pp. 299-315
Author(s):  
G. Dautcourt
Keyword(s):  
Gravitational Waves ◽  
Gravitational Radiation ◽  
Low Frequency ◽  
Wave Band ◽  
Thermal Background

An intense non-thermal background of cosmic gravitational radiation in the Megaparsec wave band could be detected by its influence on many astrophysical processes. In particular, it may give an explanation of the so-called redshift anomalies.

Low-frequency gravitational radiation from coalescing massive black holes

2005 ◽  
Vol 22 (10) ◽  
pp. S363-S368 ◽  
Author(s):  
A Sesana ◽  
F Haardt ◽  
P Madau ◽  
M Volonteri
Keyword(s):  
Black Holes ◽  
Gravitational Radiation ◽  
Low Frequency ◽  
Massive Black Holes

scholarly journals Path length variations due to changes in tropospheric refraction

1979 ◽  
Vol 89 ◽  
pp. 157-162 ◽  
Author(s):  
Allen Joel Anderson
Keyword(s):  
Spectral Analysis ◽  
Gravitational Radiation ◽  
Path Length ◽  
Low Frequency ◽  
Length Variation ◽  
Deep Space ◽  
Very Low Frequency ◽  
Tropospheric Refraction ◽  
Detection Capabilities

An experiment is described in which microwave Doppler is used to determine very small changes in path length to spacecraft tracked by the Deep Space Tracking Network (DSN). The experiment was carried out to test the detection capabilities of the DSN system to gravitational radiation of very low frequency (10−2–10−4 Hz). In this work spectral analysis of Doppler variations were performed for periods over 4 hours and more.These results indicated that one of major sources of noise was due to rapid variations in tropospheric refraction. The results obtained a differential path length variation, ΔL/L, of 1 part in 1014 for periods between 100 and 1 000 seconds.Doppler spectra are shown and a general discussion of the experiment is given.

scholarly journals SOGRO (Superconducting Omni-directional Gravitational Radiation Observatory)

2018 ◽  
Vol 168 ◽  
pp. 01005 ◽  
Author(s):  
Ho Jung Paik
Keyword(s):  
Gravitational Radiation ◽  
Thermal Noise ◽  
Low Frequency ◽  
Newtonian Gravity ◽  
Strain Sensitivity ◽  
Wave Polarization ◽  
Intermediate Mass ◽  
Binary Black Holes ◽  
New Era ◽  
Made In

Detection of gravitational waves (GWs) from merging binary black holes (BHs) by Advanced LIGO has ushered in the new era of GW astronomy. Many conceivable sources such as intermediate-mass BH binaries and white dwarf binaries, as well as stellar-mass BH inspirals, would emit GWs below 10 Hz. It is highly desirable to open a new window for GW astronomy in the infrasound frequency band. A low-frequency tensor detector could be constructed by combining six magnetically levitated superconducting test masses. Such a detector would be equally sensitive to GWs coming from anywhere in the sky, and would be capable of resolving the source direction and wave polarization. I will present the design concept of a new terrestrial GW detector, named SOGRO, which could reach a strain sensitivity of 10−19-10−21 Hz−1/2 at 0.1-10 Hz. Seismic and Newtonian gravity noises are serious obstacles in constructing terrestrial GW detectors at frequencies below 10 Hz. I will explain how these noises are rejected in SOGRO. I will also report the progress made in designing the platform and modelling its thermal noise.

scholarly journals Low‐Frequency Gravitational Radiation from Coalescing Massive Black Hole Binaries in Hierarchical Cosmologies

2004 ◽  
Vol 611 (2) ◽  
pp. 623-632 ◽  
Author(s):  
Alberto Sesana ◽  
Francesco Haardt ◽  
Piero Madau ◽  
Marta Volonteri
Keyword(s):  
Black Hole ◽  
Gravitational Radiation ◽  
Low Frequency ◽  
Massive Black Hole ◽  
Black Hole Binaries

scholarly journals Pulsar Timing Limits on Very Low Frequency Stochastic Gravitational Radiation

1996 ◽  
Vol 160 ◽  
pp. 132
Author(s):  
Rachel J. Dewey ◽  
Stephen E. Thorsett
Keyword(s):  
Galaxy Formation ◽  
Gravitational Radiation ◽  
Low Frequency ◽  
Radiation Background ◽  
Arrival Times ◽  
Statistical Framework ◽  
Pulsar Timing ◽  
Orbital Decay ◽  
Timing Data ◽  
Gravitational Wave Background

AbstractA low-frequency, stochastic gravitational radiation background can be detected through the irregularities it induces in pulsar arrival times. In this poster we re-examine pulsar timing data presented in Kaspi, Taylor and Ryba (1994) [Ap.J.,428, p. 713] and present an optimal statistical framework for using timing data from a single pulsar to constrain the energy density in a gravitational wave background. Observations of PSRB1855+09 yield an upper limit (95% confidence) 1.0 × 10−8or (90% confidence) 4.8 × 10−9of the closure density at frequency 4.4 × 10−9Hz. This result probably rules out cosmological models that use cosmic strings as seeds for galaxy formation. Using combined observations of the orbital decay of four binary pulsars we also derive weaker limits at frequencies as low as 10−12Hz.

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