The structure of Herbig-Haro object 39

Details The structure of Herbig-Haro object 39 The structure of Herbig-Haro object 39

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..220s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 1, July 1992, p. 220-227, 434, 435.

Astronomy and Astrophysics

Astronomy

6

Charge Coupled Devices, H Alpha Line, Herbig-Haro Objects, Stellar Luminosity, Stellar Structure, Emission Spectra, Oxygen, Shock Waves, Sulfur

Scientific paper

Monochromatic images of HH 39 obtained in the light of H-alpha, forbidden O III, and forbidden S II are used to investigate the structure of this high-excitation object. Features in knot A at the head of the flow are interpreted in terms of a working surface composed of a bow shock and a Mach disk. Images in forbidden O III and H-alpha reveal a high-temperature bow shock with a lower-temperature shock at the position of the Mach disk. The trailing semistellar knots E, D, and G may represent clumps of material caught in the middle of the supersonic flow, or instabilities in which material has been entrained at the interface of the flow and the ambient medium. An extended region (J) of forbidden O III emission is identified, representing the highest-excitations gas found in any HH object.

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