The radio continuum morphology of the Orion Nebula: from 10' to 0.1" resolution.
Abstract
A complete set of newly measured radio continuum maps of the Orion Nebula at 20 and 2 cm is presented. The largest field covers a region of 2 deg x 2 deg with a resolution of 10 arcmin, the smallest covers 3 arcmin x 3 arcmin field, centered on the peak, with a resolution of 0.1 arcsec. The lower resolution maps emphasize the extended emission of the diffuse ionized gas. As the resolution increases, the maps sample regions of higher emission measure. A detailed comparison with H-alpha images shows a very good match on all scale sizes. As the resolution becomes finer than 1 arcsec a completely new aspect of the radio emission appears: a new class of weak, small diameter sources of high surface brightness are found. Many of these features are associated with stars. Finally, a morphological comparison of the radio continuum emission with similar-scale maps of molecular and atomic emission is presented.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- April 1993
- Bibcode:
- 1993A&AS...98..137F
- Keywords:
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- Astronomical Maps;
- Continuous Spectra;
- Interstellar Gas;
- Line Spectra;
- Orion Nebula;
- Radio Astronomy;
- H Alpha Line;
- Very Large Array (Vla);
- Astronomy