An extended, high speed, ionized flow in the vicinity of a Herbig-Haro-like knot (M42-HH2) in the core of the Orion nebula (NGC 1976)

Details An extended, high speed, ionized flow in the vicinity of a Herbig-Haro-like knot (M42-HH2) in the core of the Orion nebula (NGC 1976) An extended, high speed, ionized flow in the vicinity of a Herbig-Haro-like knot (M42-HH2) in the core of the Orion nebula (NGC 1976)

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...164..358m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 164, no. 2, Aug. 1986, p. 358-363.

Astronomy and Astrophysics

Astrophysics

25

Astronomical Spectroscopy, Herbig-Haro Objects, Orion Nebula, Line Spectra, Optical Filters, Oxygen, Radial Velocity, Stellar Winds, Velocity Distribution

Scientific paper

A small, lowly ionized, high speed, knot M42-HH2 in the core of the Orion nebula has now been associated with a more extensive region emitting the [O III] 5007 Å line which has a similar negative velocity component of -54 km s-1 with respect to the systemic velocity. The positive velocity component from the receding side of an expanding shell is also tentatively detected. M42-HH2 could be a collimated flow, shock ionized by the wind from a local source, with a surrounding pressure driven bubble radiatively ionized by the ultra-violet radiation of the general field from the OB stars in the Trapezium cluster. Alternatively all the M42-HH like knots could be some manifestation of the general, bi-conical, molecular outflows from the BN source.

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