Issue |
A&A
Volume 586, February 2016
|
|
---|---|---|
Article Number | A86 | |
Number of page(s) | 8 | |
Section | Astrophysical processes | |
DOI | https://doi.org/10.1051/0004-6361/201527197 | |
Published online | 28 January 2016 |
The stochastic background of gravitational waves due to the f-mode instability in neutron stars
1 Theoretical Astrophysics, IAAT, Eberhard-Karls University of Tübingen, 72076 Tübingen, Germany
e-mail: marco.surace@port.ac.uk
2 Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Rd, Portsmouth, PO1 3FX, UK
Received: 14 August 2015
Accepted: 3 December 2015
This paper presents an estimate for the spectral properties of the stochastic background of gravitational waves emitted by a population of hot, young, rapidly rotating neutron stars throughout the Universe undergoing f-mode instabilities, formed through either core-collapse supernova explosions or the merger of binary neutron star systems. Their formation rate, from which the gravitational wave event rate is obtained, is deduced from observation-based determinations of the cosmic star formation rate. The gravitational wave emission occurs during the spin-down phase of the f-mode instability. For low magnetized neutron stars and assuming 10% of supernova events lead to f-mode unstable neutron stars, the background from supernova-derived neutron stars peaks at Ωgw ~ 10-9 for the l = m = 2f-mode, which should be detectable by cross-correlating a pair of second generation interferometers (e.g. Advanced LIGO/Virgo) with an upper estimate for the signal-to-noise ratio of ≈9.8. The background from supramassive neutron stars formed from binary mergers peaks at Ωgw ~ 10-10 and should not be detectable, even with third generation interferometers (e.g. Einstein Telescope).
Key words: cosmology: miscellaneous / gravitational waves / stars: neutron / stars: oscillations
© ESO, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.