tokens: This work is based on observations with the NASA/ESA Hubble Space Telescope , which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. T.H. and S.B. were supported by grant HST GO 13862. V.W. acknowledges the support of the European Research Council via the award of a starting gant (SEDMorph: P.I. V. Wild). This project also made use of archival SDSS data. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS Web Site is http://www.sdss.org/ . The SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions. The Participating Institutions are the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, University of Cambridge, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max Planck-Institute for Astronomy (MPIA), the Max Planck-Institute for Astrophysics (MPA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington. T.H. thanks the Kavli Institute for Theoretical Physics, the Simons Foundation, and the Aspen Center for Physics for supporting informal workshops on galactic winds, feedback, and the circum-galactic medium during 2014, 2015, and 2016. These provided important input for this paper. Conversations at these workshops with Romeel Davé Crystal Martin, Norm Murray, Ralph Pudritz, Eliot Quataert, Brant Robertson, Chuck Steidel, Todd Thompson, and Ellen Zweibel were especially helpful. He also thanks Greg Bryan, Mark Voit, and Brian O‘Shea for interesting discussions of the possible importance of wind-driven precipitation. Facility: Sloan (COS) .
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