Infrared spectrophotometry of NGC 7023 with ISOCAM.

Details Infrared spectrophotometry of NGC 7023 with ISOCAM. Infrared spectrophotometry of NGC 7023 with ISOCAM.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.305c&link_type=abstract

Astronomy and Astrophysics, v.315, p.L305-L308

Astronomy and Astrophysics

Astrophysics

86

Ism: Individual: Ngc 7023, Ism: Dust, Ism: Molecules, Ism: Reflection Nebulae, Infrared: Ism: Lines And Bands, Infrared: Ism: Continuum

Scientific paper

We present spectrophotometric observations of the reflection nebula NGC 7023 obtained with the ISOCAM Circular Variable Filter (CVF) in the spectral range 5.15 to 16.5μm. Maps in the 16μm continuum emission and in the Unidentified Infrared Bands (UIBs) have been obtained. The continuum emission peaks at the dense interface between the surrounding molecular cloud and the inner photodissociated region. The whole spectrum (UIBs and continuum) becomes systematically harder closer to the exciting star. Our observations show that it is entirely due to the same category of carriers, probably PAHs heated transiently by single photons, and that the systematic spectral changes inside NGC 7023 are due to changes in the size distribution or/and ionization degree of these particles.

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