| Description |
scientific abstract the l1551 irs 5 outflow was detected at 60 and 100 microns by the iras satellite. this emission has been attributed to dust grains transiently heated by uv photons from shocks with the supersonic flow. a comparison of the mechanical luminosity of this outflow, derived from co data, and estimates of its infrared luminosity, shows that the outflow should be momentum driven. there are, however, several problems in interpreting co data, such as projection effects, which make a statistical approach, to determining whether outflows are momentum or energy driven, more appropriate. the purpose of this proposal then is to find, and map, further examples of infrared emission from bipolar molecular outflows and to determine their spectral energy distributions. this will enable us to test, in general, whether outflows are energy or momentum conserving, and to measure how much energy is fed back into the molecular cloud for turbulent support. observation summary the targeted outflows will be raster mapped using aot pht32 and the pht-c100 detector over the complete length of the outflows as determined from co maps. the filters required are c_60 and c_90. follow-up observations with the pht-c200 detectors will be performed on the basis of these maps. the oversampling factor will be 2 and the maps will cover areas of 8.x4. (b335), 6.x4. (ngc2071), 4.x4. (hh7-11), 3.x6. (l1448), 4.x4.(l483). the typical s/n will be approximately 10 assuming a flux of one tenth of that of the l1551 outflow. |
