PhysRevD.82.065004.pdf (2.96 MB)
CMB power spectra from cosmic strings: Predictions for the Planck satellite and beyond
journal contribution
posted on 2023-06-08, 06:53 authored by Neil Bevis, Mark HindmarshMark Hindmarsh, Martin Kunz, Jon UrrestillaWe present a significant improvement over our previous calculations of the cosmic string contribution to cosmic microwave background (CMB) power spectra, with particular focus on sub-WMAP angular scales. These smaller scales are relevant for the now-operational Planck satellite and additional suborbital CMB projects that have even finer resolutions. We employ larger Abelian Higgs string simulations than before and we additionally model and extrapolate the statistical measures from our simulations to smaller length scales. We then use an efficient means of including the extrapolations into our Einstein-Boltzmann calculations in order to yield accurate results over the multipole range 2 <= l <= 4000. Our results suggest that power-law behavior cuts in for l greater than or similar to 3000 in the case of the temperature power spectrum, which then allows cautious extrapolation to even smaller scales. We find that a string contribution to the temperature power spectrum making up 10% of power at l = 10 would be larger than the Silk-damped primary adiabatic contribution for l greater than or similar to 3500. Astrophysical contributions such as the Sunyaev-Zeldovich effect also become important at these scales and will reduce the sensitivity to strings, but these are potentially distinguishable by their frequency-dependence.
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Publication status
- Published
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- Published version
Journal
Physical Review DISSN
1550-7998Publisher
American Physical SocietyExternal DOI
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6Volume
82Page range
1-18Department affiliated with
- Physics and Astronomy Publications
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Article Number: 065004Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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