Gravitational Waves from a Cosmological Distribution of Sources
نویسنده
چکیده
The advent of gravitational wave detectors such as the Laser Interferometer Space Antenna and the Advanced-Laser Interferometer Gravitational wave Observatory will make it possible to observe many gravitational wave emission phenomena that may or may not have electromagnetic counterparts. In many cases, gravitational waves serve as probes of length and time scales that range many orders of magnitude as compared to electromagnetic waves. Sources of gravitational waves can be classified into non-primordial and primordial. Non-primordial sources include binary compact object inspirals, core-collapse supernovae and Neutron stars. Primordial sources include cosmological defects, phase transitions in the early universe, and inflation. In this paper we briefly outline the signatures of gravitational waves from different types of sources. We also provide a simple theorem to calculate the gravitational wave background due to a cosmological distribution of these sources. We determine that the background is cosmology independent and is a function of the cosmological distribution, the total time integrated energy spectrum of an individual source and the present-day comoving number density of remnants.
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