High resolution far-infrared observations of the evolved H II region M16

Astronomy and Astrophysics – Astronomy

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Astronomical Maps, Far Infrared Radiation, H Ii Regions, Infrared Astronomy, Molecular Clouds, Stellar Evolution, Balloon-Borne Instruments, Brightness Temperature, Continuous Radiation, Gas Ionization, High Resolution, O Stars, Stellar Luminosity

Scientific paper

A balloon-borne telescope was used to map NGC 6611, and three far-IR sources embedded in an extended ridge of emission were detected. It is found that Source I is an unresolved far-IR source, embedded in a molecular cloud, which despite the association of an H2O maser with its source does not exhibit radio continuum emissions. Far-IR sources II and III are associated with ionized gas-molecular cloud interfaces, with the far-IR radiation arising from dust at the boundary heated by the OB cluster. These observations are consistent with models of the later stages of evolution of an H II region.

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