Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma

被引:42
作者
Deffayet, C
Harari, D
Uzan, JP
Zaldarriaga, M
机构
[1] NYU, Dept Phys, New York, NY 10003 USA
[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina
[3] Univ Paris 11, CNRS, UMR 8627, Phys Theor Lab, F-91405 Orsay, France
[4] Inst Astrophys, F-75014 Paris, France
[5] Inst Adv Study, Princeton, NJ 08540 USA
来源
PHYSICAL REVIEW D | 2002年 / 66卷 / 04期
关键词
D O I
10.1103/PhysRevD.66.043517
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It has been suggested recently that the observed dimming of distant type Ia 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.
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页数:6
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