in view of the success of the cam central program on nebulae and hii regions dcesarsk_hii, we propose to observe in the open time other sources for which we have good near-ir data and co maps. reflection nebulae provide a special opportunity to study the general interstellar medium. the same physical processes rule both types of sources but the much more intense radiation field in reflection nebulae makes their emission much brighter and their properties perhaps different. we propose to observe a few objects with cam and the cvf in order to enlarge the sample of nebulae in which the uib emission features are mapped, with an emphasis on different radiation fields (intensity and spectrum). complementary data exist on the chosen sources, such as nir h2 emission and co maps. the comparison with the uib emission is a powerful tool to determine the geometry of the nebula, and the nature of the different emission regions. in particular, we aim at studying the existence of pahs and the variations in their band and continuum emission in ionized, diffuse and dense gas submitted to a variety of radiation fields.
Instrument
CAM04
Temporal Coverage
1997-10-03T09:23:52Z/1998-01-06T02:49:19Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
