Galaxies (May 2024)
CHANG-ES XXXI—A Decade of CHANG-ES: What We Have Learned from Radio Observations of Edge-on Galaxies
- Judith Irwin,
- Rainer Beck,
- Tanden Cook,
- Ralf-Jürgen Dettmar,
- Jayanne English,
- Volker Heesen,
- Richard Henriksen,
- Yan Jiang,
- Jiang-Tao Li,
- Li-Yuan Lu,
- Crystal Mele,
- Ancla Müller,
- Eric Murphy,
- Troy Porter,
- Richard Rand,
- Nathan Skeggs,
- Michael Stein,
- Yelena Stein,
- Jeroen Stil,
- Andrew Strong,
- Rene Walterbos,
- Q. Daniel Wang,
- Theresa Wiegert,
- Yang Yang
Affiliations
- Judith Irwin
- Department of Physics, Engineering Physics & Astronomy, Queen’s University, Kingston, ON K7L 3N6, Canada
- Rainer Beck
- Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
- Tanden Cook
- Department of Physics, Engineering Physics & Astronomy, Queen’s University, Kingston, ON K7L 3N6, Canada
- Ralf-Jürgen Dettmar
- Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), Ruhr University Bochum, 44780 Bochum, Germany
- Jayanne English
- Department of Physics & Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Volker Heesen
- Hamburg Observatory, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
- Richard Henriksen
- Department of Physics, Engineering Physics & Astronomy, Queen’s University, Kingston, ON K7L 3N6, Canada
- Yan Jiang
- Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210023, China
- Jiang-Tao Li
- Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210023, China
- Li-Yuan Lu
- Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210023, China
- Crystal Mele
- Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), Ruhr University Bochum, 44780 Bochum, Germany
- Ancla Müller
- Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), Ruhr University Bochum, 44780 Bochum, Germany
- Eric Murphy
- National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA
- Troy Porter
- Kavli Institute for Particle Astrophysics and Cosmology, SLAC, 2575 Sand Hill Road, M/S 29, Menlo Park, CA 94025, USA
- Richard Rand
- Department of Physics & Astronomy, University of New Mexico, 210 Yale Blvd. NE, Albuquerque, NM 87106, USA
- Nathan Skeggs
- Department of Physics, Engineering Physics & Astronomy, Queen’s University, Kingston, ON K7L 3N6, Canada
- Michael Stein
- Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), Ruhr University Bochum, 44780 Bochum, Germany
- Yelena Stein
- Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), Ruhr University Bochum, 44780 Bochum, Germany
- Jeroen Stil
- Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
- Andrew Strong
- Max Planck Institute for Extraterrestrial Physics, Gießenbachstraße 1, 85748 Garching, Germany
- Rene Walterbos
- Astronomy Department, New Mexico State University, Las Cruces, NM 88003, USA
- Q. Daniel Wang
- Department of Astronomy, University of Massachusetts, North Pleasant Street, Amherst, MA 01003-9305, USA
- Theresa Wiegert
- Departamento Astronomía Extragaláctica, Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, Spain
- Yang Yang
- Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210023, China
- DOI
- https://doi.org/10.3390/galaxies12030022
- Journal volume & issue
-
Vol. 12,
no. 3
p. 22
Abstract
CHANG-ES (Continuum Halos in Nearby Galaxies—an EVLA Survey) is an ambitious project to target 35 nearby disk galaxies that are edge-on to the line of sight. The orientation permits both the disk and halo regions to be studied. The observations were initially at 1.5 GHz (L-band) and 6.0 GHz (C-band) in a variety of VLA array configurations, and in all four Stokes parameters, which allowed for spatially resolved images in total intensity plus polarization. The inclusion of polarization is unique to an edge-on galaxy survey and reveals the galaxies’ halo magnetic fields. This paper will summarize the results to date, some of which are new phenomena, never seen prior to CHANG-ES. For example, we see that ‘X-type’ fields, as well as rotation measure reversals, are common features of spiral galaxies. Further observations at 3.0 GHz (S-band) as well as future scientific opportunities will also be described.
Keywords
