first flag workshop
DESCRIPTION
First FLAG Workshop. Overview of where we stand Summary of results to date Future objectives for the group A Topical Issue in Solar Physics?. The Group. 21 members from 12 institutions Primary FLAG Hare & Hounds Exercise (FLAGhh01, frequency splittings) Other ‘spin-off’ projects: - PowerPoint PPT PresentationTRANSCRIPT
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First FLAG Workshop Overview of where we stand Summary of results to date Future objectives for the group A Topical Issue in Solar Physics?
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The Group 21 members from 12 institutions Primary FLAG Hare & Hounds
Exercise (FLAGhh01, frequency splittings)
Other ‘spin-off’ projects: F. Baudin: extraction of estimates of
acoustic forcing of modes S. Fletcher: Fitting in the time domain N. Seghouani: Spectral Estimates
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FLAGhh01 Main FLAG dataset FLAG_021_nw_025
Artificial Sun-as-a-star, Doppler-like data
Approximately 9.5 yrs, on 40-s cadence
10 Hounds fitted the data: WJC analysed returned estimates of mode splittings
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FLAG Hare & Hounds
Fitted minus input splitting...
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FLAG Hare & Hounds
Fitted minus input splitting...
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FLAG Hare & Hounds
Fitted minus input splitting...
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FLAG Hare & Hounds
Independent Realizations of main dataset
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FLAG Hare & Hounds
Normalized scatter between independent sets
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FLAG Hare & Hounds
Normalized scatter between hounds (main set)
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FLAG Hare & Hounds
Effect of changing fixed m-component H ratio
nmlnmln HHl |,|,|,2|, /)(
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Are differences between hounds due to assumed height ratio differences?
Test by fitting splittings of hounds at each (l,n) as function of
Here, the dummy variable j tags the results of each hound
FLAG Hare & Hounds
Effect of changing fixed m-component H ratio
njj
s lkknlv )(),( 10
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FLAG Hare & Hounds
Are different responsible for
differences?
Dotted line prediction from varying only
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Future Objectives: FLAGhh01 Complete and submit splitting
work? Get the hounds to fit with the
same m-component height ratios Which journal? WJC to write and circulate for
comment/revision to all?
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Future Objectives: New Parameters? Which parameters do we tackle
next? Working structure:
There should be spin-off programmes where individuals use data to help their own investigations
Also, a centrally co-ordinated Hare & Hounds programme (e.g., FLAGhh02 could look at frequencies)
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Future Objectives: A Topical Issue in Solar Physics? Motivation:
To demonstrate the importance of coordinated activity of this type to the community
To demonstrate widely the vigorous programme on-going in the global, low-l area
Timeliness: links to asteroseismology of solar-like stars
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Future Objectives: A Topical Issue in Solar Physics? We could do a joint issue with the
asteroseismology community (H&H activity is on-going in this area)
Can have: Topical Issue (whole volume, or half
volume/issue) Topical Section (some smaller fraction
of an issue)