Biodiversity Loss in the Orion Radio Zoo?

Details Biodiversity Loss in the Orion Radio Zoo? Biodiversity Loss in the Orion Radio Zoo?

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001rmxac..10..213h&link_type=abstract

The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows and Glows (Eds. William H. Lee and Silvia Torres-Peimbert) Rev

Astronomy and Astrophysics

Astrophysics

2

\Ion{H}{2} Regions, Interferometry, Ism: Individual (M42), Stars: Circumstellar Matter

Scientific paper

We re-examine radio observations of compact sources in the core of the Orion nebula and find that 70% of the sources correspond to known proplyds. For all of these sources, including many that have been previously classified as variable and non-thermal, the radio flux between 1.5 and 86 Ghz is fully accounted for by thermal free-free emission from the photoevaporation flow. We therefore suggest that many of the proposed Orion FOXES are in fact EIDERS, and that their apparent variability reflects observational difficulties in detecting the lower surface-brightness portions of the proplyds. The PIGs turn out to be extinct in Orion, and the hybrid creatures that we dub PANTHERS (Proplyds Associated with Non-THErmal Radio Sources) remain elusive.

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