PDF
PDF

Keywords

\ION{H}{2} REGIONS
INTERFEROMETRY
ISM: INDIVIDUAL (M42)
STARS: CIRCUMSTELLAR MATTER

How to Cite

Biodiversity Loss in the Orion Radio Zoo?. (2001). Revista Mexicana De Astrofísica Y Astronomía Serie De Conferencias, 10(1), 213-216. https://astronomia.unam.mx/journals/rmxac/article/view/2001rmxac..10..213h
hola

Abstract

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.