Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array

Stephen Muchovej; Tony Mroczkowski; John E. Carlstrom; John Cartwright; Christopher Greer; Ryan Hennessy; Michael Loh; Clem Pryke; Ben Reddall; Marcus Runyan; Matthew Sharp; David Hawkins; James W. Lamb; David Woody; Marshall Joy; Erik M. Leitch; Amber D. Miller

doi:10.1086/511971

Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array

Stephen Muchovej, Tony Mroczkowski, John E. Carlstrom, John Cartwright, Christopher Greer, Ryan Hennessy, Michael Loh, Clem Pryke, Ben Reddall, Marcus Runyan, Matthew Sharp, David Hawkins, James W. Lamb, David Woody, Marshall Joy, Erik M. Leitch, Amber D. Miller

Physics and Astronomy (Twin Cities)

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79 Scopus citations

Abstract

We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 ≤ z ≤ 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer - the Sunyaev-Zel'dovich Array (SZA) - built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9_-0.4^+0.5 × 10¹⁴ M_⊙ for Cl J1415.1+3612, 3.4_-0.5^+0.6 × 10¹⁴ M_⊙ for Cl J1429.0+4241, and 7.2_-0.9^+1.3 × 10¹⁴ M_⊙ for Cl J1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.

Original language	English (US)
Pages (from-to)	708-716
Number of pages	9
Journal	Astrophysical Journal
Volume	663
Issue number	2 I
DOIs	https://doi.org/10.1086/511971
State	Published - Jul 10 2007

Keywords

Cosmic microwave background
Cosmology: observations
Galaxies: individual (NGC 5529)
Techniques: interferometric

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Muchovej, S., Mroczkowski, T., Carlstrom, J. E., Cartwright, J., Greer, C., Hennessy, R., Loh, M., Pryke, C., Reddall, B., Runyan, M., Sharp, M., Hawkins, D., Lamb, J. W., Woody, D., Joy, M., Leitch, E. M., & Miller, A. D. (2007). Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array. Astrophysical Journal, 663(2 I), 708-716. https://doi.org/10.1086/511971

Muchovej, S, Mroczkowski, T, Carlstrom, JE, Cartwright, J, Greer, C, Hennessy, R, Loh, M, Pryke, C, Reddall, B, Runyan, M, Sharp, M, Hawkins, D, Lamb, JW, Woody, D, Joy, M, Leitch, EM & Miller, AD 2007, 'Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array', Astrophysical Journal, vol. 663, no. 2 I, pp. 708-716. https://doi.org/10.1086/511971

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title = "Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array",

abstract = "We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 ≤ z ≤ 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer - the Sunyaev-Zel'dovich Array (SZA) - built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9-0.4+0.5 × 1014 M⊙ for Cl J1415.1+3612, 3.4-0.5+0.6 × 1014 M⊙ for Cl J1429.0+4241, and 7.2-0.9+1.3 × 1014 M⊙ for Cl J1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.",

keywords = "Cosmic microwave background, Cosmology: observations, Galaxies: individual (NGC 5529), Techniques: interferometric",

author = "Stephen Muchovej and Tony Mroczkowski and Carlstrom, {John E.} and John Cartwright and Christopher Greer and Ryan Hennessy and Michael Loh and Clem Pryke and Ben Reddall and Marcus Runyan and Matthew Sharp and David Hawkins and Lamb, {James W.} and David Woody and Marshall Joy and Leitch, {Erik M.} and Miller, {Amber D.}",

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T1 - Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array

AU - Muchovej, Stephen

AU - Mroczkowski, Tony

AU - Carlstrom, John E.

AU - Cartwright, John

AU - Greer, Christopher

AU - Hennessy, Ryan

AU - Loh, Michael

AU - Pryke, Clem

AU - Reddall, Ben

AU - Runyan, Marcus

AU - Sharp, Matthew

AU - Hawkins, David

AU - Lamb, James W.

AU - Woody, David

AU - Joy, Marshall

AU - Leitch, Erik M.

AU - Miller, Amber D.

PY - 2007/7/10

Y1 - 2007/7/10

N2 - We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 ≤ z ≤ 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer - the Sunyaev-Zel'dovich Array (SZA) - built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9-0.4+0.5 × 1014 M⊙ for Cl J1415.1+3612, 3.4-0.5+0.6 × 1014 M⊙ for Cl J1429.0+4241, and 7.2-0.9+1.3 × 1014 M⊙ for Cl J1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.

AB - We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 ≤ z ≤ 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer - the Sunyaev-Zel'dovich Array (SZA) - built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9-0.4+0.5 × 1014 M⊙ for Cl J1415.1+3612, 3.4-0.5+0.6 × 1014 M⊙ for Cl J1429.0+4241, and 7.2-0.9+1.3 × 1014 M⊙ for Cl J1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.

KW - Cosmic microwave background

KW - Cosmology: observations

KW - Galaxies: individual (NGC 5529)

KW - Techniques: interferometric

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

Observations of high-redshift X-ray selected clusters with the Sunyaev-zel'dovich array

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