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| Paper: |
Typical Galaxy Synthetic Spectra for Gaia at High and Low Resolution |
| Volume: |
424, Proceedings of the 9th International Conference of the Hellenic Astronomical Society |
| Page: |
249 |
| Authors: |
Livanou, E.; Kontizas, M.; Rocca-Volmerange, B.; Tsalmantza, P.; Bellas-Velidis, I. |
| Abstract: |
A library of synthetic spectra of galaxies has already been produced with PEGASE.2 code in order to contribute to the data reduction of the Gaia space mission. The synthetic spectra allow us to correlate characteristic Spectroscopic and Photometric features of the observed galaxies with the values of the Astronomical Parameters that were used in order to produce the synthetic spectra. Consequently they can be used for training appropriate classification and regression software. So the Gaia observed spectra of galaxies, given as inputs to this software, allow us to derive the characteristic values of the real galaxies. However, the continuous progress of the Gaia preparation enables us to test more specific cases of synthetic spectra sets. Thus 407 more spectra which cover different geometry and selected redshift values were produced in order to be delivered to the Gaia Simulation Group, as a typical galaxy spectra library. This library is prepared for the Universe Model, a synthetic representation of the sky, as will be seen through Gaia. Moreover a high resolution synthetic spectra library is in progress. These spectra are produced with PEGASE-HR, an improved version of PEGASE.2 code which is using a high resolution stellar library, adjusted to the Gaia observed wavelength range. |
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