Physical properties of the solar magnetic photosphere under the MISMA hypothesis. III. Sunspot at disk center

摘要: Small-scale fluctuations of magnetic field and velocity may be responsible for the Stokes asymmetries observed in all photospheric structures (the microstructured atmosphere [MISMA] hypothesis). We support hypothesis by showing that atmospheres with optically thin microstructure reproduce polarization Fe I λλ6301.5 6302.5 a sunspot. Ten thousand spectra were fitted model MISMAs two components interleaved along line sight. Combining fits, we set up semiempirical sunspot characterized very different inclinations. The major component, which contains most mass, is more vertical than minor component. lines component are inclined below horizontal plane throughout penumbra. Magnetic mass flows parallel; consequently, both upflows downflows present everywhere on Major have velocities (several hundred meters per second versus 10 km s-1 component), but transported unit time similar. similarity between flow flux suggests emerging as return to photosphere components. If so, strength difference leads siphon whose magnitude direction agree inferred Evershed flow. Several tests internal consistency retrieved vector B does not violate ∇ = 0 condition. reproduces net circular plus abnormal behavior λ15648. use only one interpret inferring inner penumbra outer penumbra, agreement previous findings.