Condensations of a new type in the center of the Orion Nebula

Details Condensations of a new type in the center of the Orion Nebula Condensations of a new type in the center of the Orion Nebula

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980lastr..94..275l&link_type=abstract

L'Astronomie, vol. 94, June 1980, p. 275-280. In French.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Condensing, Orion Nebula, Spectrophotometry, Forbidden Bands, H Alpha Line, H Beta Line, Herbig-Haro Objects, High Resolution, Hydrogen Ions, Telescopes

Scientific paper

High-resolution electronic camera observations of regions of relatively high concentrations of ionized matter in the Orion Nebula are presented. Monochromatic plates of the region were obtained using a 106-cm telescope and a 22-mm useful-field electronic camera at wavelengths corresponding to characteristic nebular H beta, forbidden O III, H alpha, forbidden N II and forbidden S II emission lines and the nebular continuum at 6440 A. Ten objects were detected in the Trapezium region in addition to the four stars of the Trapezium, of which six, present only on the H alpha, H beta and forbidden O III plates, are identified as condensations of nebular matter exhibiting a point structure but not identifiable as Bok globules or Herbig-Haro objects. Analysis of the energy densities of each of the concentrations in H alpha, H beta and the forbidden O III lines indicates that the condensations are globules in which the exterior regions are ionized and the interior is neutral, with an inward-moving ionization front, possibly representing clouds of insufficient mass for star formation.

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