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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 448041.0, MPI für Astronomie / Publikationen_mpia
A library of galaxy spectra for Gaia
Authors:Tsalmantza, P.; Kontizas, M.; Rocca-Volmerange, B.; Bailer-Jones, C. A. L.; Kontizas, E.; Bellas-Velidis, I.; Korakitis, R.; Livanou, E.; Dapergolas, A.; Vallenari, A.; Fioc, M.
Publisher:AIP, Springer
Date of Publication (YYYY-MM-DD):2009
Title of Proceedings:Probing Stellar Populations Out to the Distant Universe
Start Page:79
End Page:82
Title of Series:AIP Conference Proceedings
Volume (in Series):1111
Place of Conference/Meeting:Cefalu, Sicily, Italy
Review Status:not specified
Audience:Experts Only
Abstract / Description:The ESA satellite mission Gaia will acquire spectrophotometric observations of several million unresolved galaxies during its five years of operation. In order to implement a classification scheme for these observations we need to build a new library of galaxy spectra which covers the necessary parameter space. Using the evolutionary code PÉGASE.2 we have produced a library of 28885 synthetic galaxy spectra at zero redshift covering four general spectral types of galaxies over the wavelength range from 250 to 1050 nm, at a sampling of 1 nm or less. The library was also reproduced for four random values of redshift in the range of 0-0.2 and it is computed on a random grid of four key astrophysical parameters (3 for SFR and 1 for timescale of the infall of gas). The synthetic library was compared with various photometric and spectroscopic observations (e.g. from SDSS) and found in good agreement with them.
Free Keywords:red shift; galaxies; gamma-ray spectroscopy
Comment of the Author/Creator:Date: 2009, May 1, 2009
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:978-0-7354-0648-3 [ID No:1]
URL: [ID No:2]
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