The Vla/Alma Nascent Disk And Multiplicity (Vandam) Survey Of Orion

We present highlights and initial results from the VANDAM II: Orion survey where we have observed 330 protostars (Class 0 and I) with ALMA at 850 micron, and we observed a subset with the VLA at 9 mm (100 Class 0, 48 Class I) all at 30 AU resolution. This survey has greater sensitivity to extended disks than the VANDAM-Perseus survey because of the shorter wavelength (850 micron) and has 4x more sources to substantially improve the multiplicity statistics. The results demonstrate the power and utility of unbiased protostar surveys in the characterization of disk formation and multiplicity.

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University of Oklahoma
United States

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