SF-05-2003

TEMPO: Tracing the Evolution of Massive Protostellar Objects

Gary A Fuller, Adam Avison, Naomi Asabre Frimpong, The TEMPO Collaboration

TEMPO is an ALMA survey of 38 colour-luminosity selected high mass protostars. Using observations in Band 6 (~230 GHz) with four wide bandwidth spectral windows, the goal of the survey is to investigate the evolutionary status of the sources using their chemical properties. The targets have been selected to have luminosities between 3x10<sup>3</sup> L<sub>?</sub> and 10<sup>5</sup> L<sub>?</sub> with a range of 24 micron to 70 micron colour. The observations have a spectral resolution of 1.25 km/s and a spatial resolution of 0.7’’, reaching a typical noise level of 0.3 mJy/beam in the continuum. This corresponds to a mean mass sensitivity of 1.0 M<sub>?</sub> (2.5 M<sub>?</sub> ) assuming a dust temperature of 15 K (30 K). The sources show a wide range of spectral line richness, with many sources showing emission from complex organic molecules (COMs). In this poster we will describe the fragmentation properties of the sources derived from the dust-continuum emission before moving on to present an exploration of the COM emission. Two new algorithms developed for the analysis of the TEMPO source, will also be described. The first, Lumberjack, estimates the continuum level in line-rich sources and the second has been developed to assess the compactness of continuum sources in the uv-plane.