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pro vyhledávání: '"Hellings, Ronald W."'
A number of scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many such scenarios predict a high-redshift population of massive black holes (MBHs), with masses in the r
Externí odkaz:
http://arxiv.org/abs/1009.0765
Autor:
Plowman, Joseph E., Jacobs, Daniel C., Hellings, Ronald W., Larson, Shane L., Tsuruta, Sachiko
Many scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many of these formation scenarios predict a high-redshift population of intermediate-mass black holes (IMBHs), wi
Externí odkaz:
http://arxiv.org/abs/0903.2059
Publikováno v:
AIPConf.Proc.873:489-493,2006
Here we describe a hierarchal and iterative data analysis algorithm used for searching, characterizing, and removing bright, monochromatic binaries from the Laser Interferometer Space Antenna (LISA) data streams. The algorithm uses the F-statistic to
Externí odkaz:
http://arxiv.org/abs/gr-qc/0608112
Publikováno v:
Class.Quant.Grav. 23 (2006) 309-318
We present results from a covariance study for the proposed Laser Astrometric Test of Relativity (LATOR) mission. This mission would send two laser-transmitter spacecraft behind the Sun and measure the relative gravitational light bending of their si
Externí odkaz:
http://arxiv.org/abs/gr-qc/0505064
Autor:
Cornish, Neil J., Hellings, Ronald W.
Publikováno v:
Class.Quant.Grav.20:4851-4860,2003
In an effort to eliminate laser phase noise in laser interferometer spaceborne gravitational wave detectors, several combinations of signals have been found that allow the laser noise to be canceled out while gravitational wave signals remain. This p
Externí odkaz:
http://arxiv.org/abs/gr-qc/0306096
Autor:
Hellings, Ronald W., Moore, Thomas A.
Publikováno v:
Class.Quant.Grav. 20 (2003) S181-S192
The nonlinear aspect of gravitational wave generation that produces power at harmonics of the orbital frequency, above the fundamental quadrupole frequency, is examined to see what information about the source is contained in these higher harmonics.
Externí odkaz:
http://arxiv.org/abs/gr-qc/0207102
Publikováno v:
Phys.Rev. D66 (2002) 062001
Unlike ground-based interferometric gravitational wave detectors, large space-based systems will not be rigid structures. When the end-stations of the laser interferometer are freely flying spacecraft, the armlengths will change due to variations in
Externí odkaz:
http://arxiv.org/abs/gr-qc/0206081
Autor:
Hellings, Ronald W.
Publikováno v:
Class.Quant.Grav. 20 (2003) 1019-1029
We consider the detection and initial guess problems for the LISA gravitational wave detector. The detection problem is the problem of how to determine if there is a signal present in instrumental data and how to identify it. Because of the Doppler a
Externí odkaz:
http://arxiv.org/abs/gr-qc/0206023
Autor:
Hellings, Ronald W.
For the last fifteen years, the limiting noise source at the low frequency end of the sensitivity window for space gravitational wave detectors has been expected to be the confusion background of overlapping galactic binary stars. Here, we present re
Externí odkaz:
http://arxiv.org/abs/gr-qc/0110052
Autor:
Hellings, Ronald W.
Publikováno v:
Class.Quant.Grav. 18 (2001) 4075-4080
The purpose of this paper is twofold. First, we will present recent results on the data processing for LISA, including algorithms for elimination of clock jitter noise and discussion of the generation of the data averages that will eventually need to
Externí odkaz:
http://arxiv.org/abs/gr-qc/0012034