Stellar sources in the ISOGAL inner galactic bulge field (l=0°,b=−1°)

Ojha, D. K. ; Omont, A. ; Ganesh, S. ; Simon, G. ; Schultheis, M. (2000) Stellar sources in the ISOGAL inner galactic bulge field (l=0°,b=−1°) Journal of Astrophysics and Astronomy, 21 (1-2). pp. 77-90. ISSN 0250-6335

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Official URL: http://www.ias.ac.in/describe/article/joaa/021/01-...

Related URL: http://dx.doi.org/10.1007/BF02702264

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 central l= ±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.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Stars: AGB and Post-AGB; Stars: Circumstellar Matter; Stars: Mass-Loss-Dust-Infrared: Stars; Galaxy: Bulge
ID Code:105484
Deposited On:26 Apr 2017 16:46
Last Modified:26 Apr 2017 16:46

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