IAU Symp. 212, Special session on
"Recent advances in nebular diagnostics of hot star atmospheres"
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Coordinators: Daniel Schaerer, Sally Oey, Paul Crowther

Main topics:
- the impact of stellar atmosphere models on nebular diagnostics, results
  from new line blanketed model atmospheres
- benchmarks for stellar + nebular modeling:
  detailed analysis of well studied HII or giant regions providing strong
  constraints on stellar and nebular models
- calibrations of stellar and abundance diagnostics
- new results from recent observations (especially ISO)

The main focus of the session will be on new line blanketed model 
atmospheres, and the modeling of simple, well constrained HII regions 
providing the best tests for combined stellar and photoionisation models.
The aim of the latter is to discuss the methodology, successes and failures
of models of the ionised ISM.

The coordinators intend to publish a summary of the session in the
proceedings of the symposium.

Program (Sunday 23 june)
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15:00 -- 15:10  Conti           Comments on stellar effective temperatures

15:10 -- 15:20  Puls            A New Spectral-Type/Teff Calibration for Hot
                                Stars

15:20 -- 15:30  Martins         Status of line blanketed O star model
                                atmospheres (CMFGEN and WMBASIC models)

15:30 -- 15:40  Norris          WR model atmospheres compared with HII regions

15:40 -- 15:55  Crowther        Discussion 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

15:55 -- 16:05  Schaerer        Testing O star model atmospheres with
                                nebular modeling (ISO results)             

16:05 -- 16:15  Bresolin        Nebular diagnostics and stellar populations of
                                HII regions
            
16:15 -- 16:25  Luridiana       The robustness of nebular diagnostics:
                                which, why and when

16:25 -- 16:35  Castellanos     Metal-rich HII regions (diagnostisc
                                and modeling)

16:35 -- 16:45  Beckman         Density bounded regions and leakage 

16:45 -- 17:00  Oey             Discussion

--> For further information contact Daniel Schaerer 
    (schaerer@ast.obs-mip.fr).

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