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

2013/10/31 by Megan B. Gralla, Megan Gralla, Devin Crichton +50 · 3 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Radio Astronomy Observations and Technology #astro-ph.CO

paper · pdf · doi:10.1093/mnras/stu1592

published as Monthly Notices of the Royal Astronomical Society 2014 445: 460-478 · Accepted version. Some reorganization of discussion, added appendices. Other minor edits

openalex publication_date 2014/09/29 · arxiv created 2014/10/23 · arxiv updated 2014/10/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 5σ level through its spectral signature, representing a statistical detection of the SZ effect in some of the lowest mass haloes (average M200 ≈ 1013 M|_\odot h₇₀^-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.

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Cited by

• SEARCHING FOR FOSSIL EVIDENCE OF AGN FEEDBACK IN WISE-SELECTED STRIPE-82 GALAXIES BY MEASURING THE THERMAL SUNYAEV–ZEL’DOVICH EFFECT WITH THE ATACAMA COSMOLOGY TELESCOPE
• On the redshift distribution and physical properties of ACT-selected DSFGs
• Star formation [wikipedia]

Related

• The radio SZ effect as a probe of the cosmological radio background
• Hot Electrons and Cold Photons: Galaxy Clusters and the Sunyaev-Zel'dovich Effect
• "SZ spectroscopy" in the coming decade: Galaxy cluster cosmology and astrophysics in the submillimeter
• Thermal Sunyaev-Zel'dovich cross-correlations with unWISE galaxies: disentangling radio contamination, dust properties, and electron pressure
• The Sunyaev-Zeldovich Effect as Microwave Foreground and Probe of Cosmology