Journal article
H I asymmetries in LVHIS, VIVA, and HALOGAS galaxies
TN Reynolds, T Westmeier, L Staveley-Smith, G Chauhan, CDP Lagos
Monthly Notices of the Royal Astronomical Society | Published : 2020
Abstract
We present an analysis of morphological, kinematic, and spectral asymmetries in observations of atomic neutral hydrogen (H I) gas from the Local Volume H I Survey (LVHIS), the VLA Imaging of Virgo in Atomic Gas (VIVA) survey, and the Hydrogen Accretion in Local Galaxies Survey. With the aim of investigating the impact of the local environment density and stellar mass on the measured H I asymmetries in future large H I surveys, we provide recommendations for the most meaningful measures of asymmetry for use in future analysis. After controlling for stellar mass, we find signs of statistically significant trends of increasing asymmetries with local density. The most significant trend we measur..
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Funding Acknowledgements
We thank B. Koribalski for providing helpful comments. We also thank B. Holwerda for instructive discussions and comments. This research was conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. This research was supported by the Munich Institute for Astro-and Particle Physics (MIAPP) of the DFG cluster of excellence 'Origin and Structure of the Universe'. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with theNational Aeronautics and SpaceAdministration. The Local Volume HI Survey HI 21-cm observations were obtained with the Australia Telescope Compact Array which is part of the Australia Telescope National Facility that is funded by the Commonwealth of Australia for operations as a National Facility managed by Commonwealth Scientific and Industrial Research Organisation (CSIRO). This research made use of data fromWSRT HALOGASDR1. The Westerbork Synthesis Radio Telescope is operated by ASTRON(Netherlands Institute forRadio Astronomy) with support from the Netherlands Foundation for Scientific Research NWO. This research used data from VIVA survey carried out on the Karl G. Jansky Very Large Array, which is part of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for HighPerformance Computing at the University of Utah. The SDSS web site is www.sdss.org.SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian ParticipationGroup, the Carnegie Institution for Science, Carnegie Mellon University, the Chilean Participation Group, the French Participation Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrof ' isica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut fur Astrophysik Potsdam (AIP), MaxPlanck-Institut fur Astronomie (MPIA Heidelberg), Max-PlanckInstitut f ur Astrophysik (MPA Garching), Max-Planck-Institut f ur Extraterrestrische Physik (MPE), National Astronomical Observatories of China, NewMexico State University, NewYork University, University of Notre Dame, Observatario Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad NacionalAutonoma de Mexico, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University ofWashington, University ofWisconsin, Vanderbilt University, and Yale University.