Solar Spectroscopy and (Pseudo-)Diagnostics of the Solar Chromosphere

Details Solar Spectroscopy and (Pseudo-)Diagnostics of the Solar Chromosphere Solar Spectroscopy and (Pseudo-)Diagnostics of the Solar Chromosphere

2009-05-16

arxiv.org/abs/0905.2623v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To appear in "Recent Advances in Spectroscopy: Astrophysical, Theoretical and Experimental Perspectives", eds. R.K. Chaudhuri,

Scientific paper

I first review trends in current solar spectrometry and then concentrate on comparing various spectroscopic diagnostics of the solar chromosphere. Some are actually not at all chromospheric but just photospheric or clapotispheric and do not convey information on chromospheric heating, even though this is often assumed. Balmer Halpha is the principal displayer of the closed-field chromosphere, but it is unclear how chromospheric fibrils gain their large Halpha opacity. The open-field chromosphere seems to harbor most if not all coronal heating and solar wind driving, but is hardly seen in optical diagnostics.

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