出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The linear polarization of the Crab pulsar and its close environment was derived from observations
with the high-speed photo-polarimeter OPTIMA at the 2.56 m Nordic Optical Telescope in the
optical spectral range (400–750 nm). The high time resolution and photon statistic allows us to
identify very fine features in the degree and angle of linear polarization as a function of pulsar
rotational phase never achieved before. The optical data show surprising correlations with the
phase structure at radio frequency. Our observations show that there exists a subtle connection
between presumed non-coherent (optical) and coherent (radio) emissions. This finding supports
previously detected correlations between the optical intensity of the Crab and the occurrence of
giant radio pulses. Interpretation of our observations require more elaborate theoretical models
than those currently available in the literature.
