Quiet Sun Workshop
EVENTS OF INTEREST:
DATA SETS USED:
ANALYSIS UNDER TAKEN:
- I hope to bring to the workshop BBSO centerline H-alpha data for 1998 June
with 1'' pixels and one-minute cadence for the whole day.
- In addition to the H-alpha data, I will also bring Yohkoh SXT data to the
As a minimum, these will included processed full-frame and
frame data from 12 UT - 20 UT on 1998 June 19, and less-complete data for
rest of that day.
RELEVANT PREVIOUS WORK:
- Multi-wavelength manifestations of spicule-like features.
"Traditional" solar spicules are chromospheric jet-like features. Yet,
spicule-like features have also been seen in UV and EUV (e.g., Dere et al.
1983, Karovska et al. 1994; see reviews in Sterling 1998, 2000). Both types
jets tend to occur in the chromospheric network regions, but just how the
chromospheric and UV features are related is not known. At the workshop, I
hope to be able to compare network brightenings seen in CDS, SUMER, and
with H-alpha features, and absorption features in TRACE. Most spicules or UV
spicules are very small (1'' wide and a few arcsec long), and therefore
spicules (whatever that is!) may be difficult to see with CDS, SUMER, and
less-than-exceptional H-alpha data. Nonetheless, some network brightenings
"blinkers" could possibly have corresponding "large" or "macro-" spicules.
presence or absence of such a connection, and the specifics of any such
connection, could help to differentiate between competing models for the
formation of spicules, and other network features.
In my talk, I will present a model (Sterling et al. 1993) which predicts a
connection between brightenings in UV and features in H-alpha, and discuss
I would expect this connection to manifest itself in the data available at
ASPIRATIONS FOR WORKSHOP:
Dere, K. P. et al. 1983, ApJ, 267, L65
- Karovska, M. et al. 1994, ApJ, 428, 854
- Sterling, A. C. et al. 1993, ApJ, 407, 778
- Sterling, A. C. 1998, ApJ, 508, 916
- Sterling, A. C. 2000, Solar Phys., 196, 79
Back to list of participants - Back to timetable - Back to list of data analysis
Working with others, I hope to find (or establish the absence of)
correspondences in H-alpha to blinkers, UV microflares, and other
phenomena in UV/EUV. I am specifically interested in examining the relative
timings between H-alpha and UV/EUV features when both are seen.