Use case: Galactic Star Content Simulator

Description

offer a service which supplies a realistic distribution of the Galactic stellar content in a given sky field.

Could be used in Virtual Telescopes; could be combined with other simulators (e.g. galaxy cluster simulators, Kuiper belt simulators, etc.)

Once the service is located in a registry, and the description fits the user requirements, the user must be able to supply input parameters (limiting magnitudes, field positions, ...) and then get back observational parameters of a Galactic stellar distribution which can be combined with the output of other simulator(s) and input in e.g. an instrument simulator.

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Principal actor

• Astronomer

• Instrument developer

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End Result

catalogue of Galactic simulated stars with observational parameters and with all necessary informational metadata

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Other actors

• galaxy cluster simulators

• instrument simulator / image generator

• Registry

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Pre-conditions

• detailed description of the Galactic star simulator in a Registry

• definition of a protocol to access simulated data

• availability of other astrophysical simulators and of instrument simulator

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Flow of events

1. definition of observation parameters (photometric bands, ...)
2. search Galactic star simulator in a Registry
3. check the availability of chosen observational parameters
4. if yes query the Galactic star simulator for given field(s)
5. possibly get simulation from fore-/background simulator(s)
6. combine the simulations and input the result in an instrument simulator or image generator

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Post-condition

catalogues of simulated Galactic stars supplied in a standard format (VOTable) with all necessary metadata informations.

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Basic assumptions

existence of simulations of Galactic stars on all the sky stored in a data base

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Key references

• Poster at ADASS XV

• A.C. Robin et al., 2003, A&A, 409:523-540

• Besançon model of the stellar populations of the Galaxy, on-line version

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Requirements on IVOA working groups

• DM/Theory IG : Simulation Data Model

• DAL : Access protocol for simulated data

• Possibility of fine parameter query description in the Registry