ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 μm and 15 μm and with DENIS in the near-infrared
Year: 2003
Type: article
Abstract: The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure, stellar populations, stellar mass-loss and the recent star formation history of the inner disk and Bulge of the Galaxy. ISOGAL combines 7 and 15 μm ISOCAM observations – with a resolution of 6″ at worst – with DENIS IJKs data to determine the nature of the sources and the interstellar extinction. We have observed about 16 square degrees with a sensitivity approaching 10–20 mJy, detecting ~105 sources, mostly AGB stars, red giants and young stars. The main features of the ISOGAL survey and the observations are summarized in this paper, together with a brief discussion of data processing and quality. The primary ISOGAL products are described briefly (a full desciption is given in Schuller et al. 2003): viz. the images and the ISOGAL–DENIS five-wavelength point source catalogue. The main scientific results already derived or in progress are summarized. These include astrometrically calibrated 7 and 15 μm images, determining structures of resolved sources; identification and properties of interstellar dark clouds; quantification of the infrared extinction law and source dereddening; analysis of red giant and (especially) AGB stellar populations in the central Bulge, determining luminosity, presence of circumstellar dust and mass-loss rate, and source classification, supplemented in some cases by ISO/CVF spectroscopy; detection of young stellar objects of diverse types, especially in the inner Bulge with information about the present and recent star formation rate; identification of foreground sources with mid-IR excess. These results are the subject of about 25 refereed papers published or in preparation.
Source: Astronomy and Astrophysics
Authors: A. Omont, G. F. Gilmore, C. Alard, B. Aracil, T. August, K. Baliyan, S. Beaulieu, S. Bégon, X. Bertou, J. A. D. L. Blommaert, J. Borsenberger, M. Burgdorf, B. Caillaud, C. Cesarsky, A. Chitre, E. Copet, B. de Batz, M. P. Egan, D. Egret, N. Epchtein, M. Felli, P. Fouqué, S. Ganesh, R. Genzel, I. S. Glass, R. Gredel, M. A. T. Groenewegen, F. Guglielmo, H. J. Habing, P. Hennebelle, B. Jiang, U. C. Joshi, S. Kimeswenger, M. Messineo, M. A. Miville-Deschênes, A. Moneti, M. Morris, D. K. Ojha, R. Ortiz, S. Ott, M. Parthasarathy, M. Pérault, S. D. Price, A. C. Robin, M. Schultheis, F. Schuller, G. Simon, A. Soive, L. Testi, D. Teyssier, D. Tiphène, M. Unavane, J. T. van Loon, R. Wyse
Institutions: Centre National de la Recherche Scientifique, Institut d'Astrophysique de Paris, University of Cambridge, Observatoire de Paris, Galaxies, Etoiles, Physique et Instrumentation, Physical Research Laboratory, University of Victoria, KU Leuven, California Institute of Technology, European Southern Observatory, Indian Institute of Science Bangalore, Laboratoire d’études spatiales et d’instrumentation en astrophysique, United States Air Force Research Laboratory, Hanscom Air Force Base, Observatoire astronomique de Strasbourg, Observatoire de la Côte d’Azur, Arcetri Astrophysical Observatory, European Southern Observatory, Max-Planck-Institut für Nachhaltige Materialien, South African Astronomical Observatory, Max Planck Institute for Astronomy, Leiden Observatory, École Normale Supérieure - PSL, Beijing Normal University, Universität Innsbruck, University of California, Los Angeles, Tata Institute of Fundamental Research, Universidade Federal do Espírito Santo, European Space Research and Technology Centre, Indian Institute of Astrophysics, Observatoire des Sciences de l’Univers Terre Homme Environnement Temps Astronomie, Keele University, Johns Hopkins University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Aeronautics and Space Administration, European Commission, National Research Foundation, Fundação de Amparo à Pesquisa do Estado de São Paulo, Indo-French Centre for the Promotion of Advanced Research, Austrian Science Fund, Centre National d’Etudes Spatiales, Hungarian Scientific Research Fund, Ministère des Affaires Etrangères, Consiglio Nazionale delle Ricerche, Centre National de la Recherche Scientifique, Institut national des sciences de l'Univers, Astrophysics Division
OpenAlex ID: W2108667615