The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing

Rupert Allison; Sam N. Lindsay; Blake D. Sherwin; Francesco De Bernardis; J. Richard Bond; Erminia Calabrese; Mark J. Devlin; Joanna Dunkley; Patricio Gallardo; Shawn Henderson; Adam D. Hincks; Renée Hlozek; Matt Jarvis; Arthur Kosowsky; Thibaut Louis; Mathew Madhavacheril; Jeff Mcmahon; Kavilan Moodley; Sigurd Naess; Laura Newburgh; Michael D. Niemack; Lyman A. Page; Bruce Partridge; Neelima Sehgal; David N. Spergel; Suzanne T. Staggs; Alexander Van Engelen; Edward J. Wollack

doi:10.1093/mnras/stv991

The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing

Rupert Allison, Sam N. Lindsay, Blake D. Sherwin, Francesco De Bernardis, J. Richard Bond, Erminia Calabrese, Mark J. Devlin, Joanna Dunkley, Patricio Gallardo, Shawn Henderson, Adam D. Hincks, Renée Hlozek, Matt Jarvis, Arthur Kosowsky, Thibaut Louis, Mathew Madhavacheril, Jeff Mcmahon, Kavilan Moodley, Sigurd Naess, Laura NewburghMichael D. Niemack, Lyman A. Page, Bruce Partridge, Neelima Sehgal, David N. Spergel, Suzanne T. Staggs, Alexander Van Engelen, Edward J. Wollack

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41 Scopus citations

Abstract

We correlate the positions of radio galaxies in the FIRST survey with the cosmic microwave background lensing convergence estimated from the Atacama Cosmology Telescope over 470 deg² to determine the bias of these galaxies. We remove optically cross-matched sources below redshift z = 0.2 to preferentially select active galactic nuclei (AGN). We measure the angular cross-power spectrum C_l^kg at 4.4σ significance in the multipole range 100 < l < 3000, corresponding to physical scales within ≈2-60 Mpc at an effective redshift z_eff = 1.5. Modelling the AGN population with a redshift-dependent bias, the cross-spectrum is well fitted by the Planck best-fitting Λ cold dark matter cosmological model. Fixing the cosmology and assumed redshift distribution of sources, we fit for the overall bias model normalization, finding b(z_eff) = 3.5 ± 0.8 for the full galaxy sample and b(z_eff) = 4.0 ± 1.1(3.0 ± 1.1) for sources brighter (fainter) than 2.5 mJy. This measurement characterizes the typical halo mass of radio-loud AGN: we find log(M_halo/M_⊙) = 13.6_-0.4^+0.3.

Original language	English (US)
Pages (from-to)	849-858
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	451
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stv991
State	Published - May 1 2015
Externally published	Yes

Keywords

Large-scale structure of Universe
Radio continuum: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stv991

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Allison, R., Lindsay, S. N., Sherwin, B. D., De Bernardis, F., Bond, J. R., Calabrese, E., Devlin, M. J., Dunkley, J., Gallardo, P., Henderson, S., Hincks, A. D., Hlozek, R., Jarvis, M., Kosowsky, A., Louis, T., Madhavacheril, M., Mcmahon, J., Moodley, K., Naess, S., ... Wollack, E. J. (2015). The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing. Monthly Notices of the Royal Astronomical Society, 451(1), 849-858. https://doi.org/10.1093/mnras/stv991

Allison, R, Lindsay, SN, Sherwin, BD, De Bernardis, F, Bond, JR, Calabrese, E, Devlin, MJ, Dunkley, J, Gallardo, P, Henderson, S, Hincks, AD, Hlozek, R, Jarvis, M, Kosowsky, A, Louis, T, Madhavacheril, M, Mcmahon, J, Moodley, K, Naess, S, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Sehgal, N, Spergel, DN, Staggs, ST, Van Engelen, A & Wollack, EJ 2015, 'The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing', Monthly Notices of the Royal Astronomical Society, vol. 451, no. 1, pp. 849-858. https://doi.org/10.1093/mnras/stv991

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title = "The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing",

abstract = "We correlate the positions of radio galaxies in the FIRST survey with the cosmic microwave background lensing convergence estimated from the Atacama Cosmology Telescope over 470 deg2 to determine the bias of these galaxies. We remove optically cross-matched sources below redshift z = 0.2 to preferentially select active galactic nuclei (AGN). We measure the angular cross-power spectrum Clkg at 4.4σ significance in the multipole range 100 < l < 3000, corresponding to physical scales within ≈2-60 Mpc at an effective redshift zeff = 1.5. Modelling the AGN population with a redshift-dependent bias, the cross-spectrum is well fitted by the Planck best-fitting Λ cold dark matter cosmological model. Fixing the cosmology and assumed redshift distribution of sources, we fit for the overall bias model normalization, finding b(zeff) = 3.5 ± 0.8 for the full galaxy sample and b(zeff) = 4.0 ± 1.1(3.0 ± 1.1) for sources brighter (fainter) than 2.5 mJy. This measurement characterizes the typical halo mass of radio-loud AGN: we find log(Mhalo/M⊙) = 13.6-0.4+0.3.",

keywords = "Large-scale structure of Universe, Radio continuum: galaxies",

author = "Rupert Allison and Lindsay, {Sam N.} and Sherwin, {Blake D.} and {De Bernardis}, Francesco and Bond, {J. Richard} and Erminia Calabrese and Devlin, {Mark J.} and Joanna Dunkley and Patricio Gallardo and Shawn Henderson and Hincks, {Adam D.} and Ren{\'e}e Hlozek and Matt Jarvis and Arthur Kosowsky and Thibaut Louis and Mathew Madhavacheril and Jeff Mcmahon and Kavilan Moodley and Sigurd Naess and Laura Newburgh and Niemack, {Michael D.} and Page, {Lyman A.} and Bruce Partridge and Neelima Sehgal and Spergel, {David N.} and Staggs, {Suzanne T.} and {Van Engelen}, Alexander and Wollack, {Edward J.}",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2015",

month = may,

day = "1",

doi = "10.1093/mnras/stv991",

language = "English (US)",

volume = "451",

pages = "849--858",

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T1 - The Atacama Cosmology Telescope

T2 - Measuring radio galaxy bias through cross-correlation with lensing

AU - Allison, Rupert

AU - Lindsay, Sam N.

AU - Sherwin, Blake D.

AU - De Bernardis, Francesco

AU - Bond, J. Richard

AU - Calabrese, Erminia

AU - Devlin, Mark J.

AU - Dunkley, Joanna

AU - Gallardo, Patricio

AU - Henderson, Shawn

AU - Hincks, Adam D.

AU - Hlozek, Renée

AU - Jarvis, Matt

AU - Kosowsky, Arthur

AU - Louis, Thibaut

AU - Madhavacheril, Mathew

AU - Mcmahon, Jeff

AU - Moodley, Kavilan

AU - Naess, Sigurd

AU - Newburgh, Laura

AU - Niemack, Michael D.

AU - Page, Lyman A.

AU - Partridge, Bruce

AU - Sehgal, Neelima

AU - Spergel, David N.

AU - Staggs, Suzanne T.

AU - Van Engelen, Alexander

AU - Wollack, Edward J.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - We correlate the positions of radio galaxies in the FIRST survey with the cosmic microwave background lensing convergence estimated from the Atacama Cosmology Telescope over 470 deg2 to determine the bias of these galaxies. We remove optically cross-matched sources below redshift z = 0.2 to preferentially select active galactic nuclei (AGN). We measure the angular cross-power spectrum Clkg at 4.4σ significance in the multipole range 100 < l < 3000, corresponding to physical scales within ≈2-60 Mpc at an effective redshift zeff = 1.5. Modelling the AGN population with a redshift-dependent bias, the cross-spectrum is well fitted by the Planck best-fitting Λ cold dark matter cosmological model. Fixing the cosmology and assumed redshift distribution of sources, we fit for the overall bias model normalization, finding b(zeff) = 3.5 ± 0.8 for the full galaxy sample and b(zeff) = 4.0 ± 1.1(3.0 ± 1.1) for sources brighter (fainter) than 2.5 mJy. This measurement characterizes the typical halo mass of radio-loud AGN: we find log(Mhalo/M⊙) = 13.6-0.4+0.3.

AB - We correlate the positions of radio galaxies in the FIRST survey with the cosmic microwave background lensing convergence estimated from the Atacama Cosmology Telescope over 470 deg2 to determine the bias of these galaxies. We remove optically cross-matched sources below redshift z = 0.2 to preferentially select active galactic nuclei (AGN). We measure the angular cross-power spectrum Clkg at 4.4σ significance in the multipole range 100 < l < 3000, corresponding to physical scales within ≈2-60 Mpc at an effective redshift zeff = 1.5. Modelling the AGN population with a redshift-dependent bias, the cross-spectrum is well fitted by the Planck best-fitting Λ cold dark matter cosmological model. Fixing the cosmology and assumed redshift distribution of sources, we fit for the overall bias model normalization, finding b(zeff) = 3.5 ± 0.8 for the full galaxy sample and b(zeff) = 4.0 ± 1.1(3.0 ± 1.1) for sources brighter (fainter) than 2.5 mJy. This measurement characterizes the typical halo mass of radio-loud AGN: we find log(Mhalo/M⊙) = 13.6-0.4+0.3.

KW - Large-scale structure of Universe

KW - Radio continuum: galaxies

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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The Atacama Cosmology Telescope: Measuring radio galaxy bias through cross-correlation with lensing

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