The dynamics of Herbig-Haro objects HH46 and 47 A and their remarkable connecting filament HH47B

Details The dynamics of Herbig-Haro objects HH46 and 47 A and their remarkable connecting filament HH47B The dynamics of Herbig-Haro objects HH46 and 47 A and their remarkable connecting filament HH47B

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225..863m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, April 15, 1987, p. 863-872.

Astronomy and Astrophysics

Astronomy

57

Astronomical Spectroscopy, Herbig-Haro Objects, Interstellar Gas, Line Spectra, Stellar Winds, H Alpha Line, Stellar Mass Ejection, T Tauri Stars

Scientific paper

Echelle observations of the H-alpha and forbidden S II line profiles have been made with the Anglo-Australian Telescope along the emission-line filament (HH47B) which connects the Herbig-Haro objects HH46 and 47 A. A red continuum source between HH46 and the 10l-micron peak also has a + or - 200 km/s wide H-alpha component center on the rest velocity of the parent globule. Scattered radiation from an embedded T Tauri star is suggested. HH46 and 47 A are receding away from the observer -143 and -112 km/s, respectively) but the connecting filament exhibits some form of velocity ellipse l-178 and -87 km/s at its center. The bipolar configuration had been previously suggested by the discovery of the counter object HH47C with a heliocentric velocity of 100 km/s. The velocity features of this assembly of HH objects are interpreted in terms of the interaction of a stellar jet with its surroundings. It is suggested that the velocity ellipse is related to the entrainment and subsequent excitation of ambient material by shock-excited jet gas.

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