Back to
IVOA Theory: Science Use Cases
Mexican VO - SVO - ESAVO Use case: Comparison of evolutionary synthesis models
Description
A user wants to compare the results given by different grids of evolutionary synthesis models (produced by different developers/groups) with observational data.
primary actor
Evolutionary synthesis model user.
End result:
Plot by VOSpec of results of theoretical and real data.
Other actors:
- Evolutionary synthesis model server
- VO Registry
- VOSpec
Pre-conditions
1 Existence of a protocol (e.g. TSAP) that explores (using the "format=metadata" option)
the parameter space of the theoretical grid of models (not known a priori).
Flow of events
All the information exchange between the synthesis model server and VOSpec is done using the TSAP protocol.
- User logins in VOSpec and makes a query by object
- Among the SSA and theoretical services provided by VOSpec the user selects those of interest.
- In response to the "format=metadata" query, the selected theoretical services send a VOTable to VOSpec with the parameter space (and the associated valid values) that defines the grid of models.This information is displayed by VOSpec
- The user selects the desired parameters/range of values, and VOSpec send them back to the theoretical service.
- The service returns a VOTable with the results to be displayed by VOSpec. Depending on the server, the results can be obtained from a pre-computed grid of models or on-the-fly.
- Models and observations are displayed. Using VOSpec both datasets can be normalized to a common scale.
Post-condition
- Results provided in VOTable format.
Basic assumptions
Synthesis models mix the results of two types of theoretical results: evolutionary tracks and atmosphere models.
Alternative flows
Open Issues
- How to evaluate if the resulting model (final product of a mathematical algorithm) has a physical meaning? Use of cautions, warnings etc...?
Originally sent by
M. Cerviņo - 27 Sep 2005
Last modified:
E. Solano - 30 Sep 2005
Please add comments below.
This area should be used for refinement of the above document. If you want to ask questions or start a dialogue with the author,
please use the theory mailing list.