Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma
It has been suggested recently that the observed dimming of distant type la supernovae may be a consequence of mixing of the photons with very light axions. We point out that the effect of the plasma, in which the photons are propagating, must be taken into account. This effect changes the oscillati...
Guardado en:
| Autores principales: | , |
|---|---|
| Publicado: |
2002
|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v66_n4_p_Deffayet http://hdl.handle.net/20.500.12110/paper_05562821_v66_n4_p_Deffayet |
| Aporte de: |
| Sumario: | It has been suggested recently that the observed dimming of distant type la supernovae may be a consequence of mixing of the photons with very light axions. We point out that the effect of the plasma, in which the photons are propagating, must be taken into account. This effect changes the oscillation probability and renders the dimming frequency dependent, contrary to observations. One may hope to accommodate the data by averaging the oscillations over many different coherence domains. We estimate the effect of coherence loss, either due to the inhomogeneities of the magnetic field or of the intergalactic plasma. These estimates indicate that the achromaticity problem can be resolved only with very specific, and probably unrealistic, properties of the intergalactic medium. ©2002 The American Physical Society. |
|---|