The earliest stages of massive star formation - Exploiting the ATCA-Spitzer synergy

Details The earliest stages of massive star formation - Exploiting the ATCA-Spitzer synergy The earliest stages of massive star formation - Exploiting the ATCA-Spitzer synergy

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atnf.prop..385l&link_type=abstract

ATNF proposal C1587, Semester: April, 2006

Computer Science

Galactic, Atca

Scientific paper

Motivated by the first results of our ongoing Spitzer/MIPS programme to search for massive stars and clusters in very early stages of evolution, we propose to observe three of the carefully selected Spitzer regions in the 3-mm continuum and in the dense gas tracer N2H+. The main scientific drivers of these observations are: (I) A direct comparison of the Spitzer 24 micron and 70 micron results with the 3-mm continuum data is possible since both trace dust emission on similar spatial scales. The energetics of individual constituents within the massive cloud cores can be estimated. (II) Both, the line and the continuum measurements, will be used for the estimation of column densities and for tracing the mass distribution on scales of <10000 AU. (III) The dynamical state of the dense gas can be assessed by the line observations. The N2H+(1-0) transition is well-suited since the system of 7 hyperfine structure lines guarantees a very robust estimation of velocities and velocity gradients. The high spatial resolution enables us to distinguish between more quiescent clumps and more disturbed gas in the vicinity of potential Spitzer point sources.

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