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A Measurement of the Millimeter Emission and the Sunyaev-zel'dovich Effect Associated with Low-frequency Radio SourcesWe present a statistical analysis of the millimeter-wavelength properties of 1.4 GHz-selected sources and a detection of the Sunyaev-Zel'dovich Effect associated with the halos that host them. The Atacama Cosmology Telescope (ACT) has conducted a survey at 148 GHz, 218 GHz and 277 GHz along the celestial equator. Using samples of radio sources selected at 1.4 GHz from the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) Survey and the National Radio Astronomy Observatory Very Large Array Sky Survey (NVSS), we measure the stacked 148, 218 and 277 GHz flux densities for sources with 1.4 GHz flux densities ranging from 5 to 200 mJy. At these flux densities, the radio source population is dominated by active galactic nuclei (AGN), with both steep and at spectrum populations, which have combined radio-to-millimeter spectral indices ranging from 0.5 to 0.95, reecting the prevalence of steep spectrum sources at high flux densities and the presence of at spectrum sources at lower flux densities. The thermal Sunyaev-Zelapos;dovich (SZ) eect associated with the halos that host the AGN is detected at the 5 level through its spectral signature. When we compare the SZ eect with weak lensing measurements of radio galaxies, we find that the relation between the two is consistent with that measured by Planck for local bright galaxies. We present a detection of the SZ eect in some of the lowest mass halos (average M(sub 200) approx. equals 10(exp 13) solar M h(sup-1) (sub 70) ) studied to date. This detection is particularly important in the context of galaxy evolution models, as it confirms that galaxies with radio AGN also typically support hot gaseous halos. With Herschel* observations, we show that the SZ detection is not significantly contaminated by dusty galaxies or by dust associated with the AGN or galaxies hosting the AGN. We show that 5 mJy < S(sub 1:4) < 200 mJy radio sources contribute l(l +1)C(sub l)/(2 pi ) = 0:37+/- 0:03 micro K(exp 2) to the angular power spectrum at l = 3000 at 148 GHz, after accounting for the SZ effect associated with their host halos.
Document ID
20140013208
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Gralla, Megan B.
(Johns Hopkins Univ. Baltimore, MD, United States)
Crichton, Devin
(Johns Hopkins Univ. Baltimore, MD, United States)
Marriage, Tobias A.
(Johns Hopkins Univ. Baltimore, MD, United States)
Mo, Wenli
(Johns Hopkins Univ. Baltimore, MD, United States)
Aguirre, Paula
(Pontificia Univ. Catolica de Chile Santiago, Chile)
Addison, Graeme E.
(British Columbia Univ. Vancouver, British Columbia, Canada)
Asboth, V.
(British Columbia Univ. Vancouver, British Columbia, Canada)
Battaglia, Nick
(Carnegie-Mellon Univ. Pittsburgh, PA, United States)
Bock, James
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bond, J. Richard
(Toronto Univ. Ontario, Canada)
Devlin, Mark J.
(Pennsylvania Univ. Philadelphia, PA, United States)
Duenner, Rolando
(Pontificia Univ. Catolica de Chile Santiago, Chile)
Hajian, Amir
(Toronto Univ. Ontario, Canada)
Halpern, Mark
(British Columbia Univ. Vancouver, British Columbia, Canada)
Hilton, Matt
(KwaZulu-Natal Univ. Durban, South Africa)
Hincks, Adam D.
(British Columbia Univ. Vancouver, British Columbia, Canada)
Hlozek Renee A.
(Princeton Univ. NJ, United States)
Huffenberger, Kevin M.
(Florida State Univ. Tallahassee, FL, United States)
Hughes, John P.
(Rutgers - The State Univ. Piscataway, NJ, United States)
Ivison, R. J.
(Edinburgh Univ. United Kingdom)
Kosowsky, Arthur
(Pittsburgh Univ. Pittsburgh, PA, United States)
Lin, Yen-Ting
(Academia Sinica Taipei, Taiwan, Province of China)
Switzer, Eric R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wollack, Edward J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Zemcov, Michael B.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
October 24, 2014
Publication Date
October 31, 2013
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN11939
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
galaxies
radio continuum
haloes
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