Work

Gravitational-Wave Background as a Probe of the Primordial Black-Hole Abundance

Year: 2009

Type: article

Abstract: The formation of a significant number of black holes (PBHs) is realized if and only if primordial density fluctuations have a large amplitude, which means that tensor perturbations generated from these scalar perturbations as a second-order effect are also large and comparable to the observational data. We show that pulsar timing data essentially rule out PBHs with 10;{2}-10;{4}M_{middle dot in circle}, which were previously considered as a candidate of intermediate-mass black holes, and that PBHs with a mass range of 10;{20} to 10;{26} g, which serves as a candidate of dark matter, may be probed by future space-based laser interferometers and atomic interferometers.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.102.161101

Authors: Ryo Saito, Jun’ichi Yokoyama

Institutions: Research Center for the Early Universe, The University of Tokyo, Kavli Institute for the Physics and Mathematics of the Universe

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science

Award: Precision cosmology beyond the cosmic variance