Instrumental and Observational Artifacts in Quiet Sun Magnetic Flux Cance llation Functions
arXiv:1209.6388 · doi:10.1007/s11207-012-0140-4
Abstract
Under the assumption that the photospheric quiet-Sun magnetic field is turbulent, the cancellation function has previously been used to estimate the true, resolution-independent mean, unsigned vertical flux . We show that the presence of network elements, noise, and seeing complicate the measurement of accurate cancellation functions and their power-law exponents . Failure to exclude network elements previously led to too low estimates of both the cancellation exponent and of . However, both and are over-estimated due to noise in magnetograms. While no conclusive value can be derived with data from current instruments, our {\it Hinode}/SP results of and gauss can be taken as upper bounds.
arXiv commentAccepted for publication in Solar Physics
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