Hypermagnetic knots and gravitational radiation at intermediate frequencies
| Autor: | Massimo Giovannini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
High Energy Physics - Theory
Astrophysics and Astronomy Cosmology and Nongalactic Astrophysics (astro-ph.CO) Physics and Astronomy (miscellaneous) Field (physics) gr-qc FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences 010306 general physics Particle Physics - Phenomenology Physics 010308 nuclear & particles physics Gravitational wave General Relativity and Cosmology hep-th Spectral density hep-ph Baryogenesis High Energy Physics - Phenomenology High Energy Physics - Theory (hep-th) Intermediate frequency Orders of magnitude (time) Quantum electrodynamics astro-ph.CO Electroweak epoch Electroweak scale Particle Physics - Theory Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | The maximally gyrotropic configurations of the hypermagnetic field at the electroweak epoch can induce a stochastic background of relic gravitational waves with comoving frequencies ranging from the $\mu$Hz to the kHz. Using two complementary approaches we construct a physical template family for the emission of the gravitational radiation produced by the hypermagnetic knots. The current constraints and the presumed sensitivities of the advanced wide-band interferometers (both terrestrial and space-borne) are combined to infer that the lack of observations at intermediate frequencies may invalidate the premise of baryogenesis models based (directly or indirectly) on the presence of gyrotropic configurations of the hypermagnetic field at the electroweak epoch. Over the intermediate frequency range the spectral energy density of the gravitational waves emitted by the hypermagnetic knots at the electroweak scale can exceed the inflationary signal even by nine orders of magnitude without affecting the standard bounds applicable on the stochastic backgrounds of gravitational radiation. The signal of hypermagnetic knots can be disambiguated, at least in principle, since the the produced gravitational waves are polarized. Comment: 19 pages, 2 figures; to appear in Classical and Quantum Gravity as a regular article |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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