Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-01-27
Astronomy and Astrophysics
Astrophysics
To appear in MNRAS, 12 pages, 9 figures
Scientific paper
10.1046/j.1365-8711.1999.02509.x
Extremely strong magnetic fields change the vacuum index of refraction. This induces a lensing effect that is not unlike the lensing phenomenon in strong gravitational fields. The main difference between the two is the polarization dependency of the magnetic lensing, a behaviour that induces a handful of interesting effects. The main prediction is that the thermal emission of neutron stars with extremely strong magnetic fields is polarized - up to a few percent for the largest fields known. This potentially allows a direct method for measuring their magnetic fields.
Heyl Jeremy S.
Lithwick Yoram
Shaviv Nir J.
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