P2.122 — THOR - The HI, OH, Recombination Line Survey of the Milky Way

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Aug 10th at 6:00 PM until 6:00 PM

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Author(s): Simon Bihr1, Henrik Beuther1, THOR collaboration1

Institution(s): 1. Max Planck Institute for Astronomy

To study a large variety of open questions, such as the transition of atomic to molecular hydrogen in Giant Molecular Clouds (GMCs) or studies of evolved stars showing OH maser emission, we have initiated a multi-line and continuum Galactic plane survey with the Karl G. Jansky Very Large Array (VLA): ‘THOR - The HI, OH, Recombination Line survey of the Milky Way’. We use the VLA for more than 200h in the C-array configuration to map the 21cm HI line, 4 OH lines, up to 19 Hα recombination lines and the continuum from 1-2GHz in full polarisation. We cover a significant fraction of the Milky Way (l=15-67°, |b|<1°) at an angular resolution of ~20’’ resulting in more than 2TB of raw data. Starting in 2012, we mapped 4 square degrees of the GMC associated with the W43 star-formation complex during a pilot study. The rest of the area was observed during two observing campaigns in 2013 and 2014. This data set will become public and on my poster, I will explain our observing strategy, the data reduction and show results of our HI and OH studies. Furthermore, I will show the wealth that this dataset offers to the community.