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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Autores principales: Deffayet, C., Harari, D., Uzan, J.-P., Zaldarriaga, M.
Formato: JOUR
Materias:
article
calculation
cosmos
light
magnetic field
mathematical analysis
oscillation
photon
probability
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05562821_v66_n4_p_Deffayet
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_05562821_v66_n4_p_Deffayet2023-10-03T15:35:48Z Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma Deffayet, C. Harari, D. Uzan, J.-P. Zaldarriaga, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Deffayet, C.
Harari, D.
Uzan, J.-P.
Zaldarriaga, M.
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.
format JOUR
author Deffayet, C.
Harari, D.
Uzan, J.-P.
Zaldarriaga, M.
author_facet Deffayet, C.
Harari, D.
Uzan, J.-P.
Zaldarriaga, M.
author_sort Deffayet, C.
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
url http://hdl.handle.net/20.500.12110/paper_05562821_v66_n4_p_Deffayet
work_keys_str_mv AT deffayetc dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma
AT hararid dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma
AT uzanjp dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma
AT zaldarriagam dimmingofsupernovaebyphotonpseudoscalarconversionandtheintergalacticplasma
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