ISOGAL is a 15μm ISOCAM survey of ~12deg^2^ in the Galactic Plane interior to |l|=45°. In combination with IJK data from the near-infrared southern sky survey DENIS, the ISO images allow the first detailed study of stellar populations throughout the inner Galaxy. We present preliminary results from a test observation at l= -45° with 6" pixels and completeness limit 8mJy. Of the ~3000 sources deg^-2^ detected, about half are KM giants, seen through extinction of up to A_v_~30, while most of the remainder are probably dusty young stars. Although away from bright IRAS regions, the field displays spectacular emission features, and, unexpectedly, a number of regions which are optically thick at 15μm. The dark regions are presumably dense filaments with A_v_>25.
Perault M, Omont A, Simon G, Seguin P, Ojha D, Blommaert J, et al. (1996). First ISOCAM images of the Milky Way. ASTRONOMY & ASTROPHYSICS, 315, 165-168.
First ISOCAM images of the Milky Way
Testi L;
1996
Abstract
ISOGAL is a 15μm ISOCAM survey of ~12deg^2^ in the Galactic Plane interior to |l|=45°. In combination with IJK data from the near-infrared southern sky survey DENIS, the ISO images allow the first detailed study of stellar populations throughout the inner Galaxy. We present preliminary results from a test observation at l= -45° with 6" pixels and completeness limit 8mJy. Of the ~3000 sources deg^-2^ detected, about half are KM giants, seen through extinction of up to A_v_~30, while most of the remainder are probably dusty young stars. Although away from bright IRAS regions, the field displays spectacular emission features, and, unexpectedly, a number of regions which are optically thick at 15μm. The dark regions are presumably dense filaments with A_v_>25.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
