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      https://www.ias.ac.in/article/fulltext/joaa/021/01-02/0077-0090

    • Keywords

       

      Stars: AGB and post-AGB; stars: circumstellar matter; stars: mass-loss-dust-infrared: stars; Galaxy: bulge

    • Abstract

       

      ISOGAL is a survey at 7 and 15 μm with ISOCAM of the inner galactic disk and bulge of our Galaxy. The survey covers ∼ 22 deg2 in selected areas of the centrall = ±30 degree of the inner Galaxy. In this paper, we report the study of a small ISOGAL field in the inner galactic bulge (l = 0°,b = −1°, area = 0.033deg2). Using the multicolor nearinfrared data (IJKs) of DENIS (DEep Near Infrared Southern Sky Survey) and mid-infrared ISOGAL data, we discuss the nature of the ISOGAL sources. The various color-color and color-magnitude diagrams are discussed in the paper. While most of the detected sources are red giants (RGB tip stars), a few of them show an excess in J-Ks and Ks-[15] colors with respect to the red giant sequence. Most of them are probably AGB stars with large mass-loss rates.

    • Author Affiliations

       

      D. K. Ojha1 A. Omont2 S. Ganesh3 G. Simon4 M. Schultheis2

      1. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai - 400 005, India
      2. Institut d’Astrophysique de Paris, CNRS, 98 bis, Bd AragoF-75014, Paris, France
      3. Physical Research Laboratory, Navrangpura, Ahmedabad - 380 009, India
      4. DASGAL, CNRS UMR 8633, Observatoire de Paris, France
    • Dates

       
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