Herbig Haro Objects in the Orion Nebula.

Details Herbig Haro Objects in the Orion Nebula. Herbig Haro Objects in the Orion Nebula.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aj....114..730o&link_type=abstract

Astronomical Journal v.114, p. 730-743 (1997)

Astronomy and Astrophysics

Astronomy

46

Stars: Pre-Main Sequence, Ism: Individual: M42

Scientific paper

We have used the Hubble Space Telescope to image two regions of the Orion Nebula in low and high ionization emission lines. There appear to be two main systems of Herbig Haro objects in the Orion nebula - a `North' System is centered slightly north of the BN and IRc2 sources, and a `South' System centered south of the Trapezium stars. The North System appears to be the result of shocks on the near side of OMC-1, the host molecular cloud for M42. The sources of these HH objects is most likely to be instabilities in shocks driven by massive star winds penetrating into a region of decreasing ambient density. HH 201 displays many of the characteristics of the North System members but lacks a trailing H_2 finger. HH 208 and 209 share this latter property and also display a very different morphological form, which puts their association with the North System in doubt. The South System contains large shocks with a variety of morphologies. This system is most likely a combination of shocks in the ionized nebular gas and lower ionization shocks formed when jets from low mass young stars strike the neutral lid lying on the near side of M42. Both shocks and photoionization affect the line excitation of HH objects in M 42, especially among the South System, where ultraviolet light from theta (1) C Ori penetrates into the back side of a bow shock that moves toward the observer. Among the bow-shaped objects along the fingers in the North system, the highest excitation lines occur near the apices of the bows, as predicted by theory. Objects that lie closer to the Trapezium are more difficult to analyze because of stronger nebular emission, rendering the HH objects best visible in [O I] and [S II] emission.

Affiliated with

Also associated with

No associations

Rating

Herbig Haro Objects in the Orion Nebula. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Herbig Haro Objects in the Orion Nebula., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Herbig Haro Objects in the Orion Nebula. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1877981