Proposal for tasks and schedule

1
Proposal for tasks and schedule

• Coordination is needed
• Tasks
• Tools
• Topics
• Which areas are not covered
• Manpower versus needs
• Complementary observations
• Tools and methods
• End to end simulation
• Prototype of reduction

2
Questions (I)

• Selection function
• Should we go fainter in magnitude (larger mass
  ratios)
• In MBP/Spectro and in astro
• Which choice in dense areas
• How to organise the future DMS data processing
• Rejection from core processing
• Various categories of DMS
• Concurrential methods

3
Questions (II)

• Impact of binarity on spectro design
• Resolution and SB2 (simulation with correct
  instrumental effects - in progress)
• Someone from the RVS group could come into the
  DMS group?
• Impact of binarity on MBP design
• Interacting binaries
• Classification of unresolved binaries
• Need of interface with the photometric group?

4
Overall mission schedule
2004
2012
2016
2020
2008
2000
Acceptance
Techno. development
Build, Test
Launch
Observations
Analysis
Catalogue
5
Prio 1A the satellite design

• On-board detection
• Detection algorithm Arenou/Babusiaux -gt SEPT
  02
• Detection limits for multiple objects
• Sample and patch study
• Optimise sampling windows and observing
  Söderhjelm
• strategy(at different magnitudes) Söderhjelm
• MBP/Spectro simulations
• Spatial resolution problems (large pixels!)
• Binarity effects for the filter selections
• Spectral resolution for efficient SB detection
• Random systematics for bright stars
• gain

(Short term - september 2002, PDHE study) Long
term - early 2005, design frozen (much
before, because of testing)
6
Prio 1B multiple stars in simulations and
reductions

• Galaxy model
• Binaries/multiples in simulations
• Prototype single-star reduction
• Rejection of multiples
• Database principles (multiple star/individual
  component boundaries)

7
Prio 2A assessing the scientific capabilities

• Simplified reduction simulations
• Semi-realistic astrometric errors S.
  Söderhjelm
• BBP Photometric errors
• Resolution limits
• Curved proper motion detection limits
• SB detection limits
• Eclipsing binaries detection limits
• Galaxy modelling with multiple stars
• Expected numbers and accuracies for multiple star
  observations with GAIA
• Evolutionnary models

8
Prio 2B dedicated DMS reduction algorithms

• Reduction simulation with no a priori knowledge
• Resolved doubles
• Reduction simulation with period-finding
• Resolved binary orbits
• Astrometric binaries orbits D. Pourbaix
• SB orbits
• Extrasolar planet orbits
• Eclipsing binaries/transits N. Robichon
• Reduction simulations for multiple stars
• Resolved multiples
• Astrometric binaries in resolved binaries
• Eclipsing Binaries in resolved binaries
• (arbitarily long list of special cases...)

9
Prio 3 Science Case

• Uniqueness (or not) of the GAIA results
• Stellar masses
• Binary statistics
• Binary origin and evolution

10
Organisation

• Put names on task responsibilities
• Reference document (short term)
• Publication plan
• technical
• Scientific increase Gaia visibility
• Next meeting
• Parallel meeting in Monte-Rosa?
• 13-14 Sept

11
Actions

• Activate PS web page
• F.A.
• Give simulated data for orbit determination
• First agree on protocol
• F.A./C.B.
• Blind tests for orbits
• Dimitri
• Alessandro
• Hans-H
• What people can give, what they request for
  simulations
• All
• MarioDimitri to agree on protocol and to contact
  Carine for simulations
• ML circulate a page

12
Thanks

• To Annick Oger and Pascal Hammes for the
  logistics
• To Staffan for the scientific organisation
• To your contribution (to be sent by email)