Zooming in on high-mass star formation with combined VLTI near-infrared interferometry and ATCA millimeter interferometry

Details Zooming in on high-mass star formation with combined VLTI near-infrared interferometry and ATCA millimeter interferometry Zooming in on high-mass star formation with combined VLTI near-infrared interferometry and ATCA millimeter interferometry

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3317k&link_type=abstract

ATNF proposal C2377, Semester: April, 2010

Astronomy and Astrophysics

Astrophysics

Star Formation, Atca

Scientific paper

In spite of its importance for astrophysics, the process through which massive stars form is only poorly understood. In a recent study, we resolved the inner environment around the high-mass protostar IRAS13481-6124 (G310.0135+00.3892) using VLTI near-infrared (2 micrometer) long-baseline interferometry and detected a compact (11 AU) disk-like structure, whose size is consistent with the expected dust sublimation radius. Perpendicular to the disk plane, we detect two bow shocks in Spitzer/IRAC images, suggesting the presence of a collimated bipolar outflow. The outflow was also detected in molecular line emission using the APEX single-dish telescope. In order to study the inner-most outflow regions and to measure the collimation angle, we propose interferometric observations in SiO, HCO+, and in the 3mm continuum emission. We also aim to resolve the thermal emission of the circumstellar dust, providing important constraints on the radial dust density profile. For the physical interpretation of the obtained data, we will simultaneously fit the SED and VLTI&ATCA visibilities using 2-D radiative transfer modeling, enabling us to characterize the global structure of the putative disk around this high-mass protostar.

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