Talk given by Nikolai Piskunov and Kevin Benson at the VAMDC Annual Meeting, University of Vienna, Austria, 24 February

1. VAMDC
demo
by Nikolai Piskunov and Kevin Benson
2/24/2012 Vienna

2. VAMDC infrastructure
Applications capable of combining,
extracting and processing data from all VOSI Node
VAMDC member databases Registry DB
... software
Client
Applications Node
Applications XSAMS DB
software
Legacy Format Node
Applications
Format
Format
converters
... software DB
converters Monitoring
converters
Database Node
VAMDC Core Infrastructure

3. VAMDC demo
1. Portal functionality
2. Test queries
3. XSAMS manipulation
4. Use case for stellar astrophysics (Gaia)
5. Automating workflow
2/24/2012 Vienna

4. Demos 1-3
2/24/2012 Vienna

5. 1.1 Portal functionality
Status and description of VAMDC databases
2/24/2012 Vienna

6. 1.2 Portal functionality
Preview of VAMDC databases capable of
responding to a query on specific ions
2/24/2012 Vienna

7. 2.1 Collision query
Finding data of collisional cross-sections for CO and H
2/24/2012 Vienna

8. 2.2 Spectral line query
Finding radiative transitions of CO in the 4.5-5 μ region
2/24/2012 Vienna

9. 3.1 XSAMS content preview
Selecting ”consumer” converter (BibTeX) for XSAMS received from HITRAN
2/24/2012 Vienna

10. 3.2 XSAMS content preview
A fragment of ”consumer” converter presentation of
radiative transitions and states as cross-linked tables
2/24/2012 Vienna

11. 4.1 Stellar astrophysics
• Goal: Deriving stellar parameters from
Not quite …
observations
• Data and tools involved:
Stellar parameters
RT solver
Atomic and
SME
Spectral synthesis molecular
data
EOS
Stellar models
Opacities
2/24/2012 Vienna

12. 4.2 What happens
• Querying VAMDC
• Converting XSAMS to SME line list format
• Starting SME
• Importing observations
• Importing line list
• Running SME
• Visualizing the results
2/24/2012 Vienna

13. 4.3 Querying VAMDC
Getting a list of atomic transitions in a given spectral
region for low excitation atomic energy levels
2/24/2012 Vienna

14. 4.4 Converting
XSAMS to SME input
Using “consumer” converter to create in input for
“Spectroscopy Made Easy” (SME) tool
2/24/2012 Vienna

15. 4.5 Running SME on
real observations
SME derives stellar parameters based on VAMDC data
2/24/2012 Vienna

16. 4.6 Results of SME fit
Resulting SME spectral synthesis compared with the
2/24/2012
observations Vienna

17. 5. Automating workflow
The end
Demo 4 was repeated in automatic mode using Taverna workflow system
2/24/2012 Vienna