Tuesday 21st June at 2.00pm @ the JAC

ABSTRACT: A unique pair of high-latitude (b +~67) adjacent giant dust structures with bipolar morphology has recently been discovered during our search of IRAS images using SkyView. Both objects are not visible in the optical. They might be nearby (<~100 pc) fossil dust jets (A&A 416, L27; 2004), but alternatively could perhaps be ISM shock fronts or simply superpositions. Our 12CO(2-1) observations at IRAM (30m tel.) in April 2005 showed that both structures are real, i.e. they hardly are superpositions. One has a remarkable dynamical behaviour, namely a strictly linear velocity gradient from one end of the object to the other (V(LSR) = 10.27 ~V 15.87 km/sec). SCUBA observations of compact knots of the other object should help to i) determine their morphologies, ii) measure their mass, temperature and density, and iii) investigate the nature of the dust within these jet candidates.