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...
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2002
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paper:paper_05562821_v66_n4_p_Deffayet2023-06-08T15:42:31Z Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma Harari, Diego Darío Zaldarriaga, Matias article calculation cosmos light magnetic field mathematical analysis oscillation photon probability 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. Fil:Harari, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zaldarriaga, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 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 |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
article calculation cosmos light magnetic field mathematical analysis oscillation photon probability |
| spellingShingle |
article calculation cosmos light magnetic field mathematical analysis oscillation photon probability Harari, Diego Darío Zaldarriaga, Matias Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| topic_facet |
article calculation cosmos light magnetic field mathematical analysis oscillation photon probability |
| description |
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. |
| author |
Harari, Diego Darío Zaldarriaga, Matias |
| author_facet |
Harari, Diego Darío Zaldarriaga, Matias |
| author_sort |
Harari, Diego Darío |
| title |
Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| title_short |
Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| title_full |
Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| title_fullStr |
Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| title_full_unstemmed |
Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| title_sort |
dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma |
| publishDate |
2002 |
| url |
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 |
| work_keys_str_mv |
AT hararidiegodario dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma AT zaldarriagamatias dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma |
| _version_ |
1768545147243462656 |