Quasar Proper Motions and Low-Frequency Gravitational Waves
Astrophysics
2009-10-28 v1
Abstract
We report observational upper limits on the mass-energy of the cosmological gravitational-wave background, from limits on proper motions of quasars. Gravitational waves with periods longer than the time span of observations produce a simple pattern of apparent proper motions over the sky, composed primarily of second-order transverse vector spherical harmonics. A fit of such harmonics to measured motions yields a 95%-confidence limit on the mass-energy of gravitational waves with frequencies <2e-9 Hz, of <0.11/h*h times the closure density of the universe.
Keywords
Cite
@article{arxiv.astro-ph/9610086,
title = {Quasar Proper Motions and Low-Frequency Gravitational Waves},
author = {Carl R. Gwinn and T. Marshall Eubanks and Ted Pyne and Mark Birkinshaw and Demetrios N. Matsakis},
journal= {arXiv preprint arXiv:astro-ph/9610086},
year = {2009}
}
Comments
15 pages, 1 figure. Also available at http://charm.physics.ucsb.edu:80/people/cgwinn/cgwinn_group/index.html