High Proper Motion Features in the Central Orion Nebula

Details High Proper Motion Features in the Central Orion Nebula High Proper Motion Features in the Central Orion Nebula

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....125..277o&link_type=abstract

The Astronomical Journal, Volume 125, Issue 1, pp. 277-287.

Astronomy and Astrophysics

Astronomy

29

Ism: Herbig-Haro Objects, Ism: Individual: Name: Orion Nebula, Ism: Jets And Outflows, Stars: Winds, Outflows

Scientific paper

The brightest portion of the Orion Nebula has been reimaged with the Hubble Space Telescope in Hα, [N II], and [O III]. Comparison with earlier Wide Field Planetary Camera 2 images going back as much as 8 yr has allowed determination of tangential velocities (proper motions) down to about 10 km s-1 for a variety of sources. Multiple outflow systems are found associated with individual proplyds in the ionized portion of the nebula (HH 518, HH 624, possibly HH 507). The Orion-S complex of radio and infrared sources is the source of multiple outflows. A new outflow system (HH 625) has been identified as coming from the blueshifted portion of the imbedded high velocity CO flow coming from the Orion-S region, this object having CO, H2, and low ionization optical components. The low velocity CO outflow originating from or near FIR 4 is the likely source of HH 530. A new imbedded source is inferred from this optical data to lie in Orion-S. This optical outflow source (OOS) clearly feeds the systems HH 269 and HH 529, which lie along a straight line. There is evidence that this is also the source for HH 528, HH 202, and HH 203/204, all of which are blueshifted (except possibly HH 528 whose radial velocity is unknown). There is no strong radio, infrared, or X-ray source within the positional ellipse of the OOS. Based in part on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

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