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: F. Baudin: extraction of estimates of

acoustic forcing of modes S. Fletcher: Fitting in the time domain N. Seghouani: Spectral Estimates

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

FLAG Hare & Hounds

Fitted minus input splitting...

FLAG Hare & Hounds

Fitted minus input splitting...

FLAG Hare & Hounds

Fitted minus input splitting...

FLAG Hare & Hounds

Independent Realizations of main dataset

FLAG Hare & Hounds

Normalized scatter between independent sets

FLAG Hare & Hounds

Normalized scatter between hounds (main set)

FLAG Hare & Hounds

Effect of changing fixed m-component H ratio

nmlnmln HHl |,|,|,2|, /)(

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

FLAG Hare & Hounds

Are different responsible for

differences?

Dotted line prediction from varying only

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?

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)

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

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)