Establishing an evolutionary sequence for high-mass star formation

Details Establishing an evolutionary sequence for high-mass star formation Establishing an evolutionary sequence for high-mass star formation

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2415f&link_type=abstract

ATNF proposal C1804, Semester: July, 2009

Computer Science

Galactic, Atca

Scientific paper

With this proposal we wish to search for free-free emission at 1.3 cm in 210 massive star forming regions already imaged by us at 1.2 mm with SIMBA@SEST and in the CS line emission. Thanks to its new band pass capabilities, ATCA has now the sensitivity in the centimeter domain needed to address the fundamental issue of discriminating between molecular clumps which contain already developed hypercompact or ultracompact HII regions and those which are still in a proto- or even pre-stellar evolutionary phase. We will trace in detail the critical phase in which the massive protostellar core accretes most of its final mass and eventually switches on its H-burning, providing statistically significant constraints on the timeline of high-mass star formation. This project thus differs significantly from the RMS-survey, which specifically excludes the earliest evolutionary phases. Planning targeted follow-up observations with ATCA and ALMA will be a natural outcome of this program.

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