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    The APEX Large CO Heterodyne Orion Legacy Survey (ALCOHOLS): I. Survey overview

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    Author
    Stanke, T.
    Arce, H.G.
    Bally, J.
    Bergman, P.
    Carpenter, J.
    Davis, C.J.
    Dent, W.
    Di Francesco, J.
    Eislöffel, J.
    Froebrich, D.
    Ginsburg, A.
    Heyer, M.
    Johnstone, D.
    Mardones, D.
    McCaughrean, M.J.
    Megeath, S.T.
    Nakamura, F.
    Smith, M.D.
    Stutz, A.
    Tatematsu, K.
    Walker, C.
    Williams, J.P.
    Zinnecker, H.
    Swift, B.J.
    Kulesa, C.
    Peters, B.
    Duffy, B.
    Kloosterman, J.
    Yιldιz, U.A.
    Pineda, J.L.
    De Breuck, C.
    Klein, T.
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    Affiliation
    Steward Observatory, University of Arizona
    Issue Date
    2022
    Keywords
    ISM: bubbles
    ISM: clouds
    ISM: jets and outflows
    ISM: kinematics and dynamics
    ISM: structure
    Submillimeter: ISM
    
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    Show full item record
    Publisher
    EDP Sciences
    Citation
    Stanke, T., Arce, H. G., Bally, J., Bergman, P., Carpenter, J., Davis, C. J., Dent, W., Di Francesco, J., Eislöffel, J., Froebrich, D., Ginsburg, A., Heyer, M., Johnstone, D., Mardones, D., McCaughrean, M. J., Megeath, S. T., Nakamura, F., Smith, M. D., Stutz, A., … Klein, T. (2022). The APEX Large CO Heterodyne Orion Legacy Survey (ALCOHOLS): I. Survey overview. Astronomy and Astrophysics.
    Journal
    Astronomy and Astrophysics
    Rights
    Copyright © ESO 2022.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Context. The Orion molecular cloud complex harbours the nearest Giant Molecular Clouds (GMCs) and the nearest site of high-mass star formation. Its young star and protostar populations are thoroughly characterized. The region is therefore a prime target for the study of star formation. Aims. Here, we verify the performance of the SuperCAM 64 pixel heterodyne array on the Atacama Pathfinder Experiment (APEX). We give a descriptive overview of a set of wide-field CO(32) spectral line cubes obtained towards the Orion GMC complex, aimed at characterizing the dynamics and structure of the extended molecular gas in diverse regions of the clouds, ranging from very active sites of clustered star formation in Orion B to comparatively quiet regions in southern Orion A. In a future publication, we will characterize the full population of protostellar outflows and their feedback over an entire GMC. Methods. We present a 2.7 square degree (130 pc2) mapping survey in the 12CO(32) transition, obtained using SuperCAM on APEX at an angular resolution of 19 (7600 AU or 0.037 pc at a distance of 400 pc), covering the main sites of star formation in the Orion B cloud (L 1622, NGC 2071, NGC 2068, Ori B9, NGC 2024, and NGC 2023), and a large patch in the southern part of the L 1641 cloud in Orion A. Results. We describe CO integrated line emission and line moment maps and position-velocity diagrams for all survey fields and discuss a few sub-regions in some detail. Evidence for expanding bubbles is seen with lines splitting into double components, often in areas of optical nebulosities, most prominently in the NGC 2024 H II region, where we argue that the bulk of the molecular gas is in the foreground of the H II region. High CO(32)/CO(10) line ratios reveal warm CO along the western edge of the Orion B cloud in the NGC 2023 & NGC 2024 region facing the IC 434 H II region. We see multiple, well separated radial velocity cloud components towards several fields and propose that L 1641-S consists of a sequence of clouds at increasingly larger distances. We find a small, seemingly spherical cloud, which we term Cow Nebula globule, north of NGC 2071. We confirm that we can trace high velocity line wings out to the extremely high velocity regime in protostellar molecular outflows for the NGC 2071-IR outflow and the NGC 2024 CO jet, and identify the protostellar dust core FIR4 (rather than FIR5) as the true driving source of the NGC 2024 monopolar outflow. © 2022 EDP Sciences. All rights reserved.
    Note
    Immediate access
    ISSN
    0004-6361
    DOI
    10.1051/0004-6361/201937034
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1051/0004-6361/201937034
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    UA Faculty Publications

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