The red colored image, obtained with NASA's SDO telescope, shows the active region simultaneously observed by CLASP2 and Hinode (IMAGE)

Instituto de Astrofísica de Canarias (IAC)

The red colored image, obtained with NASA's SDO telescope, shows the active region simultaneously observed by CLASP2 and Hinode

Caption

The red colored image, obtained with NASA's SDO telescope, shows the active region simultaneously observed by CLASP2 and Hinode. The green lines on the left panels show the slit position of the CLASP2 spectropolarimeter. At each point on the slit, CLASP2 measured the wavelength variation of the intensity (upper right panel) and circular polarization (lower right panel) of various chromospheric lines of the solar ultraviolet spectrum. At the same time, the circular polarization of photospheric lines in the visible spectral range was measured by the space telescope Hinode. Such circular polarization signals arise from the magnetic fields present at different heights in the solar atmosphere and, from them, the researchers were able to determine how the magnetic field varies from the photosphere to the base of the corona.

Credit

NAOJ, IAC, NASA/MSFC, IAS.

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