VOSA: virtual observatory SED analyzer. An application to the Collinder 69 open cluster
Abstract
Context: The physical properties of almost any kind of astronomical object can be derived by fitting synthetic spectra or photometry extracted from theoretical models to observational data.
Aims: We want to develop an automatic procedure to perform this kind of fitting to a relatively large sample of members of a stellar association and apply this methodology to the case of Collinder 69.
Methods: We combine the multiwavelength data of our sources and follow a work-flow to derive the physical parameters of the sources. The key step of the work-flow is performed by a new VO-tool, VOSA. All the steps in this process are done in a VO environment.
Results: We present this new tool, and provide physical parameters such as T_eff, gravity, luminosity, etc. for ~170 candidate members of Collinder 69, and an upper-limit for the age of this stellar association.
Conclusions: This kind of study of star forming regions, clusters, etc. produces a huge amount of data, very tedious to analyse using the traditional methodology. Thus, they are excellent examples of where to apply the VO techniques.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 2008
- DOI:
- 10.1051/0004-6361:200810395
- arXiv:
- arXiv:0808.0270
- Bibcode:
- 2008A&A...492..277B
- Keywords:
-
- astronomical data bases: miscellaneous;
- stars: formation;
- stars: circumstellar matter;
- stars: low-mass;
- brown dwarfs;
- stars: Hertzsprung-Russell (HR) and C-M diagrams;
- Galaxy: open clusters and associations: individual: Collinder 69;
- Astrophysics
- E-Print:
- Accepted for publication in A&