학술논문
CHANG-ES XXXI—A Decade of CHANG-ES: What We Have Learned from Radio Observations of Edge-on Galaxies
Document Type
article
Author
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
Source
Galaxies, Vol 12, Iss 3, p 22 (2024)
Subject
Language
English
ISSN
2075-4434
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.