First ISOCAM images of the Milky Way.

Details First ISOCAM images of the Milky Way. First ISOCAM images of the Milky Way.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.165p&link_type=abstract

Astronomy and Astrophysics, v.315, p.L165-L168

Astronomy and Astrophysics

Astrophysics

134

Galaxy: Stellar Content, Interstellar Medium: General, Interstellar Medium: Dust, Extinction, Infrared: Galaxies, Infrared: Stars

Scientific paper

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.

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