The nature of extremely young massive protostars found by ISO

Details The nature of extremely young massive protostars found by ISO The nature of extremely young massive protostars found by ISO

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20444h&link_type=abstract

Spitzer Proposal ID #20444

Computer Science

Scientific paper

Using the ISOPHOT 170 um Serendipity Survey (ISOSS) we have constructed a catalog of more than 50 very cold and massive molecular cloud cores. (Sub)millimeter continuum images of these cores at 450, 850 and 1200 um revealed a number of compact sources that show infall signatures in molecular line profiles and have no counterpart in deep near-infrared images. These objects are excellent candidates for collapsing cold and massive pre-stellar cores on the verge of becoming massive protostars or protoclusters. Sensitive mid- and far-infrared observations are urgently required to verify their suggested nature. We therefore ask for 12 hours of Spitzer observing time to perform a detailed study of 13 sources from our ISOSS sample: I) MIPS spectrophotometry of the energy distribution around 70 um will reliably constrain their temperture and density distribution. II) Deep MIPS 24 um and IRAC mapping will verify whether the objects are indeed pre-stellar and contain no deeply embedded mid-infrared sources. We will apply a multi-wavelength radiative transfer code to perform a full 3D modeling of the Spitzer data and exisiting (sub)mm measurements. The discovery of a genuine massive protostar during its initial phase of gravitational collapse would be a Spitzer breakthrough in the field of star formation.

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