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Galaxies 2017, 5(3), 47;

Can CMB Surveys Help the AGN Community?

Haverford College, Haverford, PA 1904, USA
Departamento de Física, Universidad de Oviedo, C. Federico García Lorca 18, E-33007 Oviedo, Spain
European Space Astronomy Centre, Camino Bajo del Castillo s/n, Urb. Villafranca del Castillo, 28692 Villanueva de la Cañada, E-28692 Madrid, Spain
NASA Postdoctoral Program Fellow, NASA Goddard Space Flight Center, Mail Code 665, Greenbelt, MD 20771, USA
Astronomy Department, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA
IFCA, University of Cantabria, 39005 Santander, Spain
Aalto University Metsähovi Radio Observatory, Metsahovintie 114, FIN-02540, Kylmala, 02540 Kirkkonummi, Finland
Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
Astrophysical Sciences, Princeton University, Princeton, NJ 08540, USA
Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
Author to whom correspondence should be addressed.
Academic Editors: Markus Boettcher, Emmanouil Angelakis and Jose L. Gómez
Received: 17 July 2017 / Revised: 5 August 2017 / Accepted: 18 August 2017 / Published: 30 August 2017
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
View Full-Text   |   Download PDF [10185 KB, uploaded 31 August 2017]   |  


Contemporary projects to measure anisotropies in the cosmic microwave background (CMB) are now detecting hundreds to thousands of extragalactic radio sources, most of them blazars. As a member of a group of CMB scientists involved in the construction of catalogues of such sources and their analysis, I wish to point out the potential value of CMB surveys to studies of AGN jets and their polarization. Current CMB projects, for instance, reach mJy sensitivity, offer wide sky coverage, are “blind” and generally of uniform sensitivity across the sky (hence useful statistically), make essentially simultaneous multi-frequency observations at frequencies from 30 to 857 GHz, routinely offer repeated observations of sources with interesting cadences and now generally provide polarization measurements. The aim here is not to analyze in any depth the AGN science already derived from such projects, but rather to heighten awareness of their promise for the AGN community. View Full-Text
Keywords: active galactic nuclei; extragalactic radio sources; cosmic microwave background; polarized emission active galactic nuclei; extragalactic radio sources; cosmic microwave background; polarized emission

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Partridge, B.; Bonavera, L.; López-Caniego, M.; Datta, R.; Gonzalez-Nuevo, J.; Gralla, M.; Herranz, D.; Lähteenmäki, A.; Mocanu, L.; Prince, H.; Vieira, J.; Whitehorn, N.; Zhang, L. Can CMB Surveys Help the AGN Community? Galaxies 2017, 5, 47.

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