New Herbig-Haro Objects and Giant Outflows in Orion

S. L. Mader; W. J. Zealey; Q. A. Parker; M. R. W. Masheder

doi:10.1046/j.1365-8711.1999.02973.x

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arXiv · astro-ph/9907371

New Herbig-Haro Objects and Giant Outflows in Orion

S. L. Mader·W. J. Zealey·Q. A. Parker·M. R. W. Masheder

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Abstract

We present the results of a photographic and CCD imaging survey for Herbig-Haro (HH) objects in the L1630 and L1641 giant molecular clouds in Orion. The new HH flows were initially identified from a deep H-alpha film from the recently commissioned AAO/UKST H-alpha Survey of the southern sky. Our scanned H-alpha and broad band R images highlight both the improved resolution of the H-alpha survey and the excellent contrast of the H-alpha flux with respect to the broad band R. Comparative IVN survey images allow us to distinguish between emission and reflection nebulosity. Our CCD H-alpha, [SII], continuum and I band images confirm the presence of a parsec-scale HH flow associated with the Ori I-2 cometary globule and several parsec-scale strings of HH emission centred on the L1641-N infrared cluster. Several smaller outflows display one-sided jets. Our results indicate that for declinations south of -6 degrees in L1641, parsec-scale flows appear to be the major force in the large-scale movement of optical dust and molecular gas.

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S. L. Mader, W. J. Zealey, Q. A. Parker, M. R. W. Masheder. 1999-07-27. New Herbig-Haro Objects and Giant Outflows in Orion. https://doi.org/10.1046/j.1365-8711.1999.02973.x

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