|Probing Outflows from Massive Proto-stars with High-J CO Lines
|Massive star formation remains one of the major challenges of modern astrophysics. One key ingredient which is still poorly understood are the massive outflows which are observed near 100 % detection rate toward massive protostars. The CO molecule is in principle the best probe of the flows, however most work has been done with low-J transitions which can only probe the outer swept-up layers of the flows. High-J CO transitions on the other hand probe the warm gas very near the massive protostars and are ideal probes of the physics and role of the flows in the formation of massive stars. We propose to obtain observations in the CO(10-9) and 13CO(10-9), C18O(10-9) and the CO(16-15) lines toward a sample of 4 massive protostars which drive massive flows. We will join these data with existing lower and mid-J CO data, EVLA continuum and SPITZER-IRAC data. We will carry out radiative transfer calculations of the CO lines to determine their physical properties as function of velocity. All data together will be used to investigate the driving and collimation mechanisms and and to develop coherent models for the massive flows.
|Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2013, OT2_phofner_1, SPG v14.1.0. https://doi.org/10.5270/esa-44wkgvj