Herbig-Haro Objects 46 and 47 - Evidence for bipolar ejection from a young star

A new Herbig-Haro Object (HH 47C) has been discovered in the system HH 46/47. Radial velocity measurements indicate that HH 47A is approaching at -128 km/s, whereas HH47C is receding at 105 km/s. Both components appear to have been driven clear in opposite directions from a small dark cloud which harbors HH 46 on a direct line between HH 47A and HH 47C. HH 46 exhibits a combined HH emission spectrum and a T Tauri star reflection spectrum. New spectrophotometric measurements of HH 47C and HH 47D (a 'bubble' nebula surrounding HH 47A) are also presented. A model is presented wherein the HH objects are produced by bipolar ejection from a T Tauri star embedded in an accretion disk.