ISOCAM CVF observations of the Quintuplet and Object#17 clusters near the Galactic Center.

Astronomy and Astrophysics – Astrophysics

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Dust, Extinction, H Ii Regions, Ism: Molecules, Galaxy: Center, Infrared: Interstellar: Lines

Scientific paper

Two fields near the Galactic Center, containing the Quintuplet and Object #17 star-clusters, have been imaged with the ISOCAM circular variable filters (CVFs) in the wavelength range of 2.47-3.08μm and 3.99-9.09μm. Emission of [Ar II] 6.99μm is detected in the "pistol-shaped" H II region (G0.15-0.05) to the south of the Quintuplet cluster. Absorption probably due to O-H stretching vibration (2.8μm) is evident in the Quintuplet spectra. In addition, Quintuplet members and the central part of Object #17 have CO_2_(4.3μm) and CO (4.7μm) absorption. Abundant CO_2_ might be present in these lines of sight.

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