THE LYMAN ALPHA REFERENCE SAMPLE. III. PROPERTIES OF THE NEUTRAL ISM FROM GBT AND VLA OBSERVATIONS

Stephen A. Pardy; John M. Cannon; Goran Ostlin; Matthew Hayes; Thoger Rivera-Thorsen; Andreas Sandberg; Angela Adamo; Emily Freeland; E. Christian Herenz; Lucia Guaita; Daniel Kunth; Peter Laursen; J. M. Mas-Hesse; Jens Melinder; Ivana Orlitova; Hector Oti-Floranes; Johannes Puschnig; Daniel Schaerer; Anne Verhamme

doi:10.1088/0004-637X/794/2/101

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THE LYMAN ALPHA REFERENCE SAMPLE. III. PROPERTIES OF THE NEUTRAL ISM FROM GBT AND VLA OBSERVATIONS

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THE LYMAN ALPHA REFERENCE SAMPLE. III. PROPERTIES OF THE NEUTRAL ISM FROM GBT AND VLA OBSERVATIONS

Stephen A. Pardy, John M. Cannon, Goran Ostlin, Matthew Hayes, Thoger Rivera-Thorsen, Andreas Sandberg, Angela Adamo, Emily Freeland, E. Christian Herenz, Lucia Guaita, …

The Astrophysical journal, Vol.794(2), pp.1-19

2014

DOI: 10.1088/0004-637X/794/2/101

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https://arxiv.org/pdf/1408.6275View

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Abstract

We present new Hi imaging and spectroscopy of the 14 UV-selected star-forming galaxies in the Lyman Alpha Reference Sample (LARS), aimed for a detailed study of the processes governing the production, propagation, and escape of Ly alpha photons. New Hi spectroscopy, obtained with the 100 m Green Bank Telescope (GBT), robustly detects the Hi spectral line in 11 of the 14 observed LARS galaxies (although the profiles of two of the galaxies are likely confused by other sources within the GBT beam); the three highest redshift galaxies are not detected at our current sensitivity limits. The GBT profiles are used to derive fundamental Hi line properties of the LARS galaxies. We also present new pilot Hi spectral line imaging of five of the LARS galaxies obtained with the Karl G. Jansky Very Large Array (VLA). This imaging localizes the Hi gas and provides a measurement of the total Hi mass in each galaxy. In one system, LARS 03 (UGC 8335 or Arp 238), VLA observations reveal an enormous tidal structure that extends over 160 kpc from the main interacting systems and that contains >10(9) M-circle dot of Hi. We compare various Hi properties with global Ly alpha quantities derived from Hubble Space Telescope measurements. The measurements of the Ly alpha escape fraction are coupled with the new direct measurements of Hi mass and significantly disturbed Hi velocities. Our robustly detected sample reveals tentative correlations between the total Hi mass and linewidth, and key Ly alpha tracers. Further, on global scales, these data support a complex coupling between Ly alpha propagation and the Hi properties of the surrounding medium.

Astronomy & Astrophysics

Physical Sciences

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Title: Subtitle: THE LYMAN ALPHA REFERENCE SAMPLE. III. PROPERTIES OF THE NEUTRAL ISM FROM GBT AND VLA OBSERVATIONS
Creators: Stephen A. Pardy - Macalester College
John M. Cannon - Macalester College
Goran Ostlin - Stockholm University
Matthew Hayes - Stockholm University
Thoger Rivera-Thorsen - Stockholm University
Andreas Sandberg - Stockholm University
Angela Adamo - Max Planck Institute for Astronomy
Emily Freeland - Stockholm University
E. Christian Herenz - Leibniz Institute for Astrophysics Potsdam
Lucia Guaita - Stockholm University
Daniel Kunth - Institut d'Astrophysique de Paris
Peter Laursen - University of Copenhagen
J. M. Mas-Hesse - Ctr Astrobiol CSIC INTA, Madrid, Spain
Jens Melinder - Macalester College
Ivana Orlitova - Czech Academy of Sciences, Astronomical Institute
Hector Oti-Floranes - Universidad Nacional Autónoma de México
Johannes Puschnig - Stockholm University
Daniel Schaerer - Université Fédérale de Toulouse Midi-Pyrénées
Anne Verhamme - University of Geneva
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.794(2), pp.1-19
DOI: 10.1088/0004-637X/794/2/101
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: IOP Publishing Ltd
Number of pages: 19
Grant note: Max Planck Society University of Cambridge University of Chicago Max-Planck-Institute for Astrophysics (MPA) Swedish National Space Board (SBSB) U.S. Department of Energy; United States Department of Energy (DOE) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Korean Scientist Group Institute for Advanced Study Chinese Academy of Sciences (LAMOST); Chinese Academy of Sciences United States Naval Observatory Japanese Monbukagakusho; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Swedish Research Council Swedish Research Council (Vetenskapsradet); Swedish Research Council Ohio State University Fermilab University of Pittsburgh Los Alamos National Laboratory; United States Department of Energy (DOE) University of Basel Joint Institute for Nuclear Astrophysics Alfred P. Sloan Foundation University of Washington EGGS-278202 / ERC-StG grant; European Research Council (ERC) Princeton University CNES (Centre National d'etudes spatiales); Centre National D'etudes Spatiales Sciex fellowship of the Rectors' Conference of Swiss Universities Max-Planck-Institute for Astronomy (MPIA) New Mexico State University postdoctoral UNAM grant Japan Participation Group; Sloan Digital Sky Survey (SDSS) University of Portsmouth Higher Education Funding Council for England; UK Research & Innovation (UKRI); Higher Education Funding Council for England (HEFCE) Astrophysical Institute Potsdam Kavli Institute for Particle Astrophysics and Cosmology Sung Kyu Kim and Macalester College American Museum of Natural History Case Western Reserve University National Science Foundation; National Science Foundation (NSF) Johns Hopkins University Drexel University Knut AMP; Alice Wallenbergs foundation Swedish National Space Board; Swedish National Space Agency (SNSA) AYA2010-21887-C04-02; AYA2012-39362-C02-01 / Spanish MINECO; Spanish Government
Language: English
Date published: 2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984627241302771

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