The following document lists the file abstract/THENNING_YSO_MC.abs
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SCIENTIFIC ABSTRACT THE NEW DETECTOR SATURATION LIMITS GIVEN BY THE ISOPHOT TEAM HAVE IT MADE NECESSARY TO REPLACE THE THREE BRIGHTEST TARGETS IN M17SW BY A FAINTER PROTOSTELLAR CONDENSATION. THE TWO CONDENSATIONS IN M17SW WILL BE OBSERVED WITH THE SAME AOT'S AS ORIGINALLY PROPOSED. IT WAS ONLY NECESSARY TO REPLACE SOME OF THE FILTERS AND TO MAKE MINOR CHANGES OF THE MAP PARAMETERS. The molecular cloud cores M17SW and Mon R2 play central roles in the discussion of star-formation processes. In both cases previous high spatial resolution observations show the existence of gas clumps and cool dust condensations. Sometimes these are related to compact IR sources. Dependent on the launch date, we propose to measure the spectral flux distributions of deeply embedded pre-main sequence stars and presumably protostellar condensations either in M17SW or in Mon R2. Because the energy distributions of our targets peak at or beyond 100 microns ISO is especially suited to supplement available submm/mm fluxes and derive broad-band flux distributions for these examples of very early stellar evolutionary phases. OBSERVATION SUMMARY M17SW: From IPAC maps and submm/mm observations by the Bonn MPIfR Bolometer group, we selected two protostellar condensations. We propose to make oversampled maps of the protostellar condensations with PHT-C200 (filters: 135 and 200 microns, AOT P32: Oversampling factor = 1) as well as single-pointed raster maps with PHT-P at 60 microns. Furthermore, the condensations should be observed in the single-pointing multi- filter mode with PHT-P and filters 3.6, 4.85, 7.7, 11.5, and 25 microns (AOT P03). Mon R2: We propose make oversampled maps at the position of Mon R2-IRS1 with PHT-C100 and filters 60 and 100 microns, and with PHT-C200 and filters 135 and 200 microns (AOT P32). Furthermore, we want to get single-pointing multi-filter observations with PHT-P at wavelengths 3.6, 4.85, 7.7, 11.5, 25, and 60 microns. In addition we will use PHT-P to observe 5 isolated dust clumps in single-pointing multi-filter mode (AOT P03) with the same filters as above.