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A measurement of the millimetre emission and the Sunyaev-Zel’dovich effect associated with low-frequency radio sources

Author(s): Gralla, Megan B; Crichton, Devin; Marriage, Tobias A; Mo, Wenli; Aguirre, Paula; et al

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Abstract: We present a statistical analysis of the millimetre-wavelength properties of 1.4 GHz-selected sources and a detection of the Sunyaev-Zel’dovich (SZ) effect associated with the haloes that host them. We stack data at 148, 218 and 277 GHz from the Atacama Cosmology Telescope at the positions of a large sample of radio AGN selected at 1.4 GHz. The thermal SZ effect associated with the haloes that host the AGN is detected at the 5 sigma level through its spectral signature, representing a statistical detection of the SZ effect in some of the lowest mass haloes (average M-200 approximate to 10(13) M-circle dot h(70)(-1)) studied to date. The relation between the SZ effect and mass (based on weak lensing measurements of radio galaxies) is consistent with that measured by Planck for local bright galaxies. In the context of galaxy evolution models, this study confirms that galaxies with radio AGN also typically support hot gaseous haloes. Adding Herschel observations allows us to show that the SZ signal is not significantly contaminated by dust emission. Finally, we analyse the contribution of radio sources to the angular power spectrum of the cosmic microwave background.
Publication Date: 21-Nov-2014
Electronic Publication Date: 29-Sep-2014
Citation: Gralla, Megan B, Crichton, Devin, Marriage, Tobias A, Mo, Wenli, Aguirre, Paula, Addison, Graeme E, Asboth, V, Battaglia, Nick, Bock, James, Bond, J Richard, Devlin, Mark J, Duenner, Rolando, Hajian, Amir, Halpern, Mark, Hilton, Matt, Hincks, Adam D, Hlozek, Renee A, Huffenberger, Kevin M, Hughes, John P, Ivison, RJ, Kosowsky, Arthur, Lin, Yen-Ting, Marsden, Danica, Menanteau, Felipe, Moodley, Kavilan, Morales, Gustavo, Niemack, Michael D, Oliver, Seb, Page, Lyman A, Partridge, Bruce, Reese, Erik D, Rojas, Felipe, Sehgal, Neelima, Sievers, Jon, Sifon, Cristobal, Spergel, David N, Staggs, Suzanne T, Switzer, Eric R, Viero, Marco P, Wollack, Edward J, Zemcov, Michael B. (2014). A measurement of the millimetre emission and the Sunyaev-Zel’dovich effect associated with low-frequency radio sources. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 445 (460 - 478. doi:10.1093/mnras/stu1592
DOI: doi:10.1093/mnras/stu1592
ISSN: 0035-8711
EISSN: 1365-2966
Pages: 460 - 478
Type of Material: Journal Article
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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