Line Broadening of EUV Lines at the Solar Limb Observed with SUMER/SoHO. Relation to Spicules

Details Line Broadening of EUV Lines at the Solar Limb Observed with SUMER/SoHO. Relation to Spicules Line Broadening of EUV Lines at the Solar Limb Observed with SUMER/SoHO. Relation to Spicules

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..848..115g&link_type=abstract

RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS: 7th International Conference of the Hellenic Astronomical Society. AIP Conferenc

Astronomy and Astrophysics

Astrophysics

1

Solar Instruments, Chromosphere

Scientific paper

We study the broadening of EUV line widths as we move from the disk through and off the solar limb. This broadening maximizes at approximately 10 Mm above the limb. We use one raster scan and two time series obtained by SUMER/SoHO to examine a possible correlation between this phenomenon and spicule activity. It appears that spicule presence leads to even wider profiles whereas the appearance of macrospicules extends the broadening to even greater distances above the limb. We suggest that this correlation might imply that spicules are responsible for this disk-to-limb behavior even in regions where they cannot be observed.

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