Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2025-01-04T04:40:05.073Z Has data issue: false hasContentIssue false
  • English
  • Français

The Unresolved Galaxies with Gaia

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou ,
M. Kontizas ,
I. Bellas-Velidis ,
B. Rocca-Volmerange ,
E. Kontizas ,
P. Tsalmantza ,
E. Livanou  and
A. Dapergolas
...Show all authors
M. Kontizas
Affiliation:
National and Kapodistrian University of Athens, Faculty of Physics, Athens, Greece
I. Bellas-Velidis
Affiliation:
National Observatory of Athens, Athens, Greece
B. Rocca-Volmerange
Affiliation:
Institut d’Astrophysique de Paris, 98bis Bd. Arago, 75014 Paris, France Université de Paris-Sud XI, I.A.S., 91405 Orsay Cedex, France
E. Kontizas
Affiliation:
National Observatory of Athens, Athens, Greece
P. Tsalmantza
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
E. Livanou
Affiliation:
National and Kapodistrian University of Athens, Faculty of Physics, Athens, Greece
A. Dapergolas
Affiliation:
National Observatory of Athens, Athens, Greece
A. Karampelas
Affiliation:
National and Kapodistrian University of Athens, Faculty of Physics, Athens, Greece
Get access

Abstract

Classification and parametrization of unresolved galaxies to be detected by Gaia is thegoal of our contribution to DPAC/CU8. Gaia will observe more than several times106 unresolved galaxies seen almost as point sources. For the classificationand parametrization of these sources we have undertaken the following tasks: a) providinglibraries of synthetic galaxy spectra (produced under the PÉGASE.2 code of galaxyevolution) and a semi-empirical library using observed galaxy spectra from SDSS dataarchive. b) Developping an appropriate algorithm called Unresolved Galaxy Classifier(UGC). The algorithm is being developed implementing the Support Vector Machines (SVM), asupervised training technique. This algorithm utilizes Gaia simulated BP/RP galaxy spectraof our synthetic galaxy library.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 337 - 342
Copyright
© EAS, EDP Sciences 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Références

Belcheva, M., et al., this volume
Fioc, M., & Rocca-Volmerange, B., 1997, A&A, 326, 950
Karampelas, A., et al., in preparation
Livanou, E., et al., 2009, GAIA-C8-TN-UOA-EL-001-1
Rana, N.C., & Basu, S., 1992, A&A, 265, 499
Tsalmantza, P., et al., 2007, A&A, 470, 761
Tsalmantza, P., et al., 2009, A&A, 504, 1071
Tsalmantza, P., et al., in preparation, GAIA-C8-TN-UOA-PAT-003-1