ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 and 15 micron and with DENIS in the near-infrared
arXiv:astro-ph/0304383 · doi:10.1051/0004-6361:20030437
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 micron ISOCAM observations - with a resolution of 6'' at worst - with DENIS IJKs data to determine the nature of the sources and theinterstellar extinction. We have observed about 16 square degrees with a sensitivity approaching 10-20mJy, detecting ~10^5 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 description is given in Schuller et al. 2003, astro-ph/0304309): viz. the images and theISOGAL-DENIS five-wavelength point source catalogue. The main scientific results already derived or in progress are summarized. These include astrometrically calibrated 7 and 15um 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.
A&A in press. 19 pages,10 Ps figures; problems with figures fixed
References in corpus (19)
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- Infrared stellar populations in the central parts of the Milky Way galaxy
- MSX, 2MASS, and the LMC: A Combined Near and Mid Infrared View
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- Near-IR spectra of ISOGAL sources in the Inner Galactic Bulge
- Stellar sources in the ISOGAL intermediate bulge fields
- M giants in Macho, DENIS and Isogal
- The ISOGAL field FC--01863+00035: Mid-IR interstellar extinction and stellar populations
- Optimizing ISOCAM data processing using spatial redundancy
- Young massive stars in the ISOGAL survey I. VLA observations of the ISOGAL l=+45 field
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- ISOGAL survey of Baade's Windows
Cited by in corpus (50)
- Clouds, filaments and protostars: the Herschel Hi-GAL Milky Way
- ISO spectroscopy of gas and dust: from molecular clouds to protoplanetary disks
- Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane
- Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
- Characterizing Precursors to Stellar Clusters with Herschel
- Modelling the Galactic bar using OGLE-II Red Clump Giant Stars
- The mid- and far-infrared colours of AGB and post-AGB stars
- An Infrared through Radio Study of the Properties and Evolution of IRDC Clumps
- Point Sources from a Spitzer IRAC Survey of the Galactic Center
- Recent star formation in the inner Galactic Bulge seen by ISOGAL II -- The Central Molecular Zone
- Dust-enshrouded giants in clusters in the Magellanic Clouds
- Infrared Photometry and Evolution of Mass-Losing AGB Stars I. Carbon Stars Revisited
- Tracing the development of dust around evolved stars: The case of 47 Tuc
- 86 GHz SiO maser survey of late-type stars in the Inner Galaxy III. Interstellar extinction and colours of the SiO targets
- Massive Young Stellar Objects in the Galactic Center. I. Spectroscopic Identification from Spitzer/IRS Observations
- 3D outer bulge structure from near infrared star counts
- Three dimensional interstellar extinction map towards the Galactic Bulge
- Infrared Photometry and Evolution of Mass-Losing AGB Stars. II. Luminosity and Colors of MS and S Stars
- SiO Maser Survey of the Large-Amplitude Variables in the Galactic Center
- Explanatory Supplement of the ISOGAL-DENIS Point Source Catalogue
- Tracing the Energetics and Evolution of Dust with Spitzer: a Chapter in the History of the Eagle Nebula
- Near-IR spectra of ISOGAL sources in the Inner Galactic Bulge
- Extinctions at 7um and 15um from the ISOGAL survey
- ISO Mid-Infrared Spectroscopy of Galactic Bulge AGB Stars
- 86 GHz SiO maser survey of late-type stars in the Inner Galaxy II. Infrared photometry of the SiO Target Stars
- MSX versus IRAS Two-Color Diagrams and the CSE-Sequence of Oxygen-Rich Late-Type Stars
- Cool stars in the Galactic Center as seen by APOGEE: M giants, AGB stars and supergiant stars/candidates
- A Catalog of 24um Sources Toward the Galactic Center
- Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
- Chemical Characterization of the Inner Galactic bulge:North-South Symmetry
- Period-magnitude relations for M giants in Baade's Window NGC6522
- First Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center
- Late-type giant variables in NGC6522, LMC and SMC: How do they differ?
- Understanding AGB evolution in Galactic bulge stars from high-resolution infrared spectroscopy
- Extremely red stellar objects revealed by IPHAS
- Near-infrared spectroscopic observations of massive young stellar object candidates in the Central Molecular Zone
- Mid-IR period-magnitude relations for AGB stars
- On the highly reddened members in 6 young galactic star clusters - a multiwavelength study
- Recent star formation in the inner Galactic Bulge seen by ISOGAL. I - Classification of bright mid-IR sources in a test field
- Complex small-scale structure in the infrared extinction towards the Galactic Centre
- On the detection of CO and mass loss of Bulge OH/IR stars
- Near-IR spectroscopy of OH/IR stars in the Galactic Centre
- A distance scale of planetary nebulae based on mid-infrared data
- Polycyclic aromatic hydrocarbon emission toward the Galactic bulge
- CO line observations of OH/IR stars in the inner Galactic Bulge: Characteristics of stars at the tip of the AGB
- 86 GHz SiO masers in Galactic Centre OH/IR stars
- Infrared colours and bolometric corrections of SiO masing stars in the inner Milky Way
- Infrared observations of the flaring maser source G358.93-0.03 -- SOFIA confirms an accretion burst from a massive young stellar object
- 86 GHz SiO maser survey of late-type stars in the Inner Galaxy. IV. SiO emission and infrared data for sources in the Scutum and Sagittarius-Carina arms, 20 deg < l < 50 deg
- Stellar populations in a standard ISOGAL field in the Galactic disk