Survey W. J. Zealey, S. L. Mader, PASA, 15 (1), 165
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Introduction
The process of star formation is a highly disruptive event where both infall and outflow of material occur simultaneously in the production of a protostellar core. The outflow phase is characterised by the impact of high velocity winds with the surrounding interstellar medium, creating bipolar molecular outflows, masers, Herbig-Haro (HH) objects and jets. Multi-wavelength observations have shown HH objects and jets to be regions of shock-excited gas emitting H
(
6563), [OI] (6300,6363) and [SII] (6716,6731) in the visible and H
(2.12 
m) in the infrared.
The new AAO/UKSTU H Survey of the Galactic Plane will be beneficial to star formation studies as it provides us with a tool for surveying large regions near and around dark clouds for signs of outflow activity from young stellar objects (YSOs) which span a wide range in evolution from highly embedded sources to optically visible T Tauri stars. In this poster paper, we outline an application of digital methods to the study of outflows from YSOs using the AAO/UKSTU H Survey of the Galactic Plane in conjunction with existing ESO/SERC Schmidt Plates. These allow us to identify shock-excited emission regions and distinguish between reflection and emission nebulosity. The image digitisation process has been discussed elsewhere (Zealey et al. 1994; Zealey & Mader 1997). This paper will be devoted to showing examples of the digitised images and the information we can obtain from them.
| Next Section: HH 49/50 Title/Abstract Page: Image Digitisation of Outflows Previous Section: Image Digitisation of Outflows | Contents Page: Volume 15, Number 1 |
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