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The first Galaxy scale hunt for the youngest high-mass protostars

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arxiv 1512.04522 v1 pith:O3V4MCWZ submitted 2015-12-13 astro-ph.GA astro-ph.SR

The first Galaxy scale hunt for the youngest high-mass protostars

classification astro-ph.GA astro-ph.SR
keywords massivestarsalmaenvelopesfirstobjectsoriginsize-scales
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The origin of massive stars is a fundamental open issue in modern astrophysics. Pre-ALMA interferometric studies reveal precursors to early B to late O type stars with collapsing envelopes of 15-20 M$_\odot$ on 1000-3000 AU size-scales. To search for more massive envelopes we selected the most massive nearby young clumps from the ATLASGAL survey to study their protostellar content with ALMA. Our first results using the intermediate scales revealed by the ALMA ACA array providing 3-5" angular resolution, corresponding to $\sim$0.05-0.1 pc size-scales, reveals a sample of compact objects. These massive dense cores are on average two-times more massive than previous studies of similar types of objects. We expect that once the full survey is completed, it will provide a comprehensive view on the origin of the most massive stars.

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