publication . Preprint . 2007

Latitudinal variation of the solar photospheric intensity

Rast, Mark P.; Ortiz, Ada; Meisner, Randle W.;
Open Access English
  • Published: 16 Oct 2007
Abstract
We have examined images from the Precision Solar Photometric Telescope (PSPT) at the Mauna Loa Solar Observatory (MLSO) in search of latitudinal variation in the solar photospheric intensity. Along with the expected brightening of the solar activity belts, we have found a weak enhancement of the mean continuum intensity at polar latitudes (continuum intensity enhancement $\sim0.1 - 0.2%$ corresponding to a brightness temperature enhancement of $\sim2.5{\rm K}$). This appears to be thermal in origin and not due to a polar accumulation of weak magnetic elements, with both the continuum and CaIIK intensity distributions shifted towards higher values with little cha...
Subjects
arxiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Solar and Stellar AstrophysicsPhysics::Space Physics
free text keywords: Astrophysics
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