Faraday rotation of radio sources from THOR

DOI

We present first results for Faraday rotation of compact polarized sources (1-2GHz continuum) in The HI/OH/Recombination line (THOR) survey of the inner Galaxy. In the Galactic longitude range 39{deg}<l<52{deg}, we find rotation measures (RMs) in the range -310rad/m^2^<=RM49{deg}, RM drops off rapidly, while at l49{deg}. We attribute the RM structure to the compressed diffuse warm ionized medium in the spiral arm, upstream of the major star formation regions. The Sagittarius arm acts as a significant Faraday screen inside the Galaxy. This has implications for models of the Galactic magnetic field and the expected amount of Faraday rotation of fast radio bursts from their host galaxies. We emphasize the importance of sensitivity to high Faraday depth in future polarization surveys.

Cone search capability for table J/ApJ/887/L7/table1 (Rotation measure detections)

Identifier
DOI http://doi.org/10.26093/cds/vizier.18879007
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/887/L7
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/887/L7
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/887/L7
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/887/L7
Provenance
Creator Shanahan R.; Lemmer S.J.; Stil J.M.; Beuther H.; Wang Y.; Soler J.,Anderson L.D.; Bigiel F.; Glover S.C.O.; Goldsmith P.; Klessen R.S.,McClure-Griffiths N.M.; Reissl S.; Rugel M.; Smith R.J.
Publisher CDS
Publication Year 2021
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysical Processes; Astrophysics and Astronomy; Cosmology; Exoplanet Astronomy; Interstellar medium; Natural Sciences; Observational Astronomy; Physics