Working groups

The four current (01/26) working groups are:
  • Chemistry (Mon)
  • Physics of stars (Wed)
  • Stellar populations (Thu)
  • Cosmology (Fri)

Notes from before 01/26 are below.

Binary Stars and Evolution

  • Unknowns in binary star evolution (common-envelope,...)

  • Impact and relevance of binary stars on stellar evolution in general

  • Binary population
    Do assumptions in population synthesis codes agree with latest observations (mass ratios, orbital period distrib,...)?
    Binaries as 'contaminators' (sic) in studies on clusters etc: good knowledge of binaries needed!

  • Binary stars as key calibrators; benchmark for asteroseismology etc.
    Jason mentions problematic double red giant binary with ~20% discrepancy between asteroseismic and binary radii. Interesting in terms of rotation speeds, and potentially we can figure out which one is pulsating based on light travel time effect.

  • Surveys: what can we learn, what to look for?
    Can we catch a system in common-envelope? What would it look like...?

  • Triple systems (with a binary component) and how to use them

  • Modelling of binary star observables
    Uncertainty in limb darkening (Dave, please give links to 3D simulations)
    Surface discretization issues with Wilson Devinney style codes
    Correct modelling of reflection/irradiation/reprocessing is an issue

Summary of the talk on how binaries are modeled: (sorry the photo is crooked, it was the only way to get everything in at once)

Rotation and Magnetism

  • ...


Points brought up during the initial discussion:

Precision and Errors in Astrophysics

  • Dealing with uncertainties and uncertainties on/of uncertainties
  • Communicating uncertainty estimates in articles
  • Uncertainties on theoretical values and predictions
  • ...

Beyond Phase Space

  • Exploiting astrometry and chemistry to trace accretion histories
  • Additional tracers/indicators of MW origin