Revisiting Rotation Measures from the Canadian Galactic Plane Survey: the Magnetic Field in the Disk of the Outer Galaxy

Abstract

Faraday rotation provides a valuable tracer of magnetic fields in the interstellar medium; catalogs of Faraday rotation measures provide key observations for studies of the Galactic magnetic field. We present a new catalog of rotation measures derived from the Canadian Galactic Plane Survey, covering a large region of the Galactic plane spanning 52 deg < l < 192 deg, -3 deg < b < 5 deg, along with northern and southern latitude extensions around l ~ 105 deg. We have derived rotation measures for 2234 sources (4 of which are known pulsars), 75% of which have no previous measurements, over an area of approximately 1300 square degrees. These new rotation measures increase the measurement density for this region of the Galactic plane by a factor of two.

16 pages, 6 figures and 3 tables. Accepted by ApJS. Catalog available as ancillary data

References in corpus (13)

• Array Programming with NumPy
• The ATNF Pulsar Catalogue
• Radio observational constraints on Galactic 3D-emission models
• Magnetism in the spiral galaxy NGC 6946: magnetic arms, depolarization rings, dynamo modes and helical fields
• Rotation Measures of Extragalactic Sources Behind the Southern Galactic Plane: New Insights into the Large-Scale Magnetic Field of the Inner Milky Way
• Practical Modeling of Large-Scale Galactic Magnetic Fields: Status and Prospects
• Strong excess Faraday rotation on the Inside of the Sagittarius spiral arm
• S-PASS/ATCA: a window on the magnetic universe in the southern hemisphere
• The Complex Large-scale Magnetic Fields in the First Galactic Quadrant as Revealed by the Faraday Depth Profile Disparity
• A Radio Continuum and Polarisation Study of the pulsar wind nebula CTB87 (G74.9+1.2)
• A High Resolution Survey of the Galactic Plane at 408 MHz
• A 1420 MHz Catalog of Compact Sources in the Northern Galactic Plane
• Power Spectrum Analysis of Polarized Emission from the Canadian Galactic Plane Survey

Cited by in corpus (13)

• The Coherent Magnetic Field of the Milky Way
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• RMTable2023 and PolSpectra2023: standards for reporting polarization and Faraday rotation measurements of radio sources
• The Global Magneto-Ionic Medium Survey: A Faraday Depth Survey of the Northern Sky Covering 1280-1750 MHz
• The coherent magnetic field of the Milky Way halo, Local Bubble and Fan Region
• Peering into the Milky Way by FAST: III. Magnetic fields in the Galactic halo and farther spiral arms revealed by the Faraday effect of faint pulsars
• The Huge Magnetic Toroids in the Milky Way Halo
• The Galactic Faraday rotation sky 2020
• Superposing the Magnetic spiral structure of the Milky Way, on the stellar spiral arms -- Matching the unique galactic magnetic field reversal Zone with two galactic spiral arm Segments
• A pioneering experiment combining single-antenna and aperture-synthesis data to measure Faraday rotation with GMIMS and the CGPS
• A three-dimensional model for the reversal in the local large-scale interstellar magnetic field
• Interaction Between Rogue HI Clouds and the Magnetic Field High Above the Galaxy
• New Radio Observations of the Supernova Remnant CTA 1