Microwave background signatures of a primordial stochastic magnetic field
| العنوان: | Microwave background signatures of a primordial stochastic magnetic field |
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| المؤلفون: | Tina Kahniashvili, Andrew Mack, A. Kosowsky |
| المصدر: | Physical Review D. 65 |
| بيانات النشر: | American Physical Society (APS), 2002. |
| سنة النشر: | 2002 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Astrophysics (astro-ph), Cosmic microwave background, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Polarization (waves), Upper and lower bounds, Spectral line, Magnetic field, Amplitude, Quantum mechanics, Anisotropy, Microwave |
| الوصف: | A stochastic magnetic field in the early Universe will produce anisotropies in the temperature and polarization of the cosmic microwave background. We derive analytic expressions for the microwave background temperature and polarization power spectra induced by vector and tensor perturbations from a power-law magnetic field. For a scale-invariant stochastic magnetic field smoothed over a comoving scale of $1 {\rm Mpc}$, the MAP satellite has the potential to constrain the comoving mean-field amplitude to be no greater than approximately $2\times10^{-9}$ G. Limits improve as the power-law slope increases: for causally-generated power-law magnetic fields, the comoving mean-field amplitude has an upper bound of approximately $4\times10^{-13} {\rm G}$. Such constraints will surpass all current limits on galactic-scale primordial stochastic magnetic fields at decoupling. 28 pages, 3 Postscript figures. Improved treatments on vorticity and magnetic damping. Revised version in response to the referee's comments |
| تدمد: | 1089-4918 0556-2821 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::557d6b3748bb447cb8866786c2653e36Test https://doi.org/10.1103/physrevd.65.123004Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....557d6b3748bb447cb8866786c2653e36 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10894918 05562821 |
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