The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications

Neta A. Bahcall; Feng Dong; Paul Bode; Rita Kim; James Annis; Timothy A. McKay; Sarah Hansen; Josh Schroeder; James Gunn; Jeremiah P. Ostriker; Marc Postman; Robert C. Nichol; Chris Miller; Tomotsugu Goto; Jon Brinkmann; Gillian R. Knapp; Don O. Lamb; Donald P. Schneider; Michael S. Vogeley; Donald G. York

doi:10.1086/345981

The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications

Neta A. Bahcall, Feng Dong, Paul Bode, Rita Kim, James Annis, Timothy A. McKay, Sarah Hansen, Josh Schroeder, James Gunn, Jeremiah P. Ostriker, Marc Postman, Robert C. Nichol, Chris Miller, Tomotsugu Goto, Jon Brinkmann, Gillian R. Knapp, Don O. Lamb, Donald P. Schneider, Michael S. Vogeley, Donald G. York

Astrophysical Sciences

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Abstract

The mass function of clusters of galaxies is determined from 400 deg ² of early commissioning imaging data of the Sloan Digital Sky Survey using ∼300 clusters in the redshift range z = 0.1-0.2. Clusters are selected using two independent selection methods: a matched filter and a red-sequence color-magnitude technique. The two methods yield consistent results. The cluster mass function is compared with large-scale cosmological simulations. We find a best-fit cluster normalization relation of σ ₈Ω_m^0.6 = 0.33 ± 0.03 (for 0.1 ≲ Ω_m ≲ 0.4) or, equivalently, σ₈ = (0.16/Ω_m)^0.6. The amplitude of this relation is significantly lower than the previous canonical value, implying that either Ω_m is lower than previously expected (Ω_m = 0.16 if σ₈ = 1) or σ₈ is lower than expected (σ₈ = 0.7 if Ω_m = 0.3). The shape of the cluster mass function partially breaks this classic degeneracy. We find best-fit parameters of Ω_m = 0.19±_0.07 ^0.08 and σ₈ = 0.9±_0.2 ^0.3. High values of Ω_m (≳ 0.4) and low σ₈ (≲ 0.6) are excluded at ≳ 2 σ.

Original language	English (US)
Pages (from-to)	182-190
Number of pages	9
Journal	Astrophysical Journal
Volume	585
Issue number	1 I
DOIs	https://doi.org/10.1086/345981
State	Published - Mar 1 2003

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmological parameters
Cosmology: observations
Cosmology: theory
Dark matter
Galaxies: clusters: general
Large-scale structure of universe

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10.1086/345981

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Bahcall, N. A., Dong, F., Bode, P., Kim, R., Annis, J., McKay, T. A., Hansen, S., Schroeder, J., Gunn, J., Ostriker, J. P., Postman, M., Nichol, R. C., Miller, C., Goto, T., Brinkmann, J., Knapp, G. R., Lamb, D. O., Schneider, D. P., Vogeley, M. S., & York, D. G. (2003). The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications. Astrophysical Journal, 585(1 I), 182-190. https://doi.org/10.1086/345981

@article{4711589ef7d24aecb4d7485cb1686791,

title = "The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications",

abstract = "The mass function of clusters of galaxies is determined from 400 deg 2 of early commissioning imaging data of the Sloan Digital Sky Survey using ∼300 clusters in the redshift range z = 0.1-0.2. Clusters are selected using two independent selection methods: a matched filter and a red-sequence color-magnitude technique. The two methods yield consistent results. The cluster mass function is compared with large-scale cosmological simulations. We find a best-fit cluster normalization relation of σ 8Ωm0.6 = 0.33 ± 0.03 (for 0.1 ≲ Ωm ≲ 0.4) or, equivalently, σ8 = (0.16/Ωm)0.6. The amplitude of this relation is significantly lower than the previous canonical value, implying that either Ωm is lower than previously expected (Ωm = 0.16 if σ8 = 1) or σ8 is lower than expected (σ8 = 0.7 if Ωm = 0.3). The shape of the cluster mass function partially breaks this classic degeneracy. We find best-fit parameters of Ωm = 0.19±0.07 0.08 and σ8 = 0.9±0.2 0.3. High values of Ωm (≳ 0.4) and low σ8 (≲ 0.6) are excluded at ≳ 2 σ.",

keywords = "Cosmological parameters, Cosmology: observations, Cosmology: theory, Dark matter, Galaxies: clusters: general, Large-scale structure of universe",

author = "Bahcall, {Neta A.} and Feng Dong and Paul Bode and Rita Kim and James Annis and McKay, {Timothy A.} and Sarah Hansen and Josh Schroeder and James Gunn and Ostriker, {Jeremiah P.} and Marc Postman and Nichol, {Robert C.} and Chris Miller and Tomotsugu Goto and Jon Brinkmann and Knapp, {Gillian R.} and Lamb, {Don O.} and Schneider, {Donald P.} and Vogeley, {Michael S.} and York, {Donald G.}",

year = "2003",

month = mar,

day = "1",

doi = "10.1086/345981",

language = "English (US)",

volume = "585",

pages = "182--190",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1 I",

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Bahcall, NA, Dong, F, Bode, P, Kim, R, Annis, J, McKay, TA, Hansen, S, Schroeder, J, Gunn, J, Ostriker, JP, Postman, M, Nichol, RC, Miller, C, Goto, T, Brinkmann, J, Knapp, GR, Lamb, DO, Schneider, DP, Vogeley, MS & York, DG 2003, 'The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications', Astrophysical Journal, vol. 585, no. 1 I, pp. 182-190. https://doi.org/10.1086/345981

TY - JOUR

T1 - The cluster mass function from early Sloan Digital Sky Survey data

T2 - Cosmological implications

AU - Bahcall, Neta A.

AU - Dong, Feng

AU - Bode, Paul

AU - Kim, Rita

AU - Annis, James

AU - McKay, Timothy A.

AU - Hansen, Sarah

AU - Schroeder, Josh

AU - Gunn, James

AU - Ostriker, Jeremiah P.

AU - Postman, Marc

AU - Nichol, Robert C.

AU - Miller, Chris

AU - Goto, Tomotsugu

AU - Brinkmann, Jon

AU - Knapp, Gillian R.

AU - Lamb, Don O.

AU - Schneider, Donald P.

AU - Vogeley, Michael S.

AU - York, Donald G.

PY - 2003/3/1

Y1 - 2003/3/1

N2 - The mass function of clusters of galaxies is determined from 400 deg 2 of early commissioning imaging data of the Sloan Digital Sky Survey using ∼300 clusters in the redshift range z = 0.1-0.2. Clusters are selected using two independent selection methods: a matched filter and a red-sequence color-magnitude technique. The two methods yield consistent results. The cluster mass function is compared with large-scale cosmological simulations. We find a best-fit cluster normalization relation of σ 8Ωm0.6 = 0.33 ± 0.03 (for 0.1 ≲ Ωm ≲ 0.4) or, equivalently, σ8 = (0.16/Ωm)0.6. The amplitude of this relation is significantly lower than the previous canonical value, implying that either Ωm is lower than previously expected (Ωm = 0.16 if σ8 = 1) or σ8 is lower than expected (σ8 = 0.7 if Ωm = 0.3). The shape of the cluster mass function partially breaks this classic degeneracy. We find best-fit parameters of Ωm = 0.19±0.07 0.08 and σ8 = 0.9±0.2 0.3. High values of Ωm (≳ 0.4) and low σ8 (≲ 0.6) are excluded at ≳ 2 σ.

AB - The mass function of clusters of galaxies is determined from 400 deg 2 of early commissioning imaging data of the Sloan Digital Sky Survey using ∼300 clusters in the redshift range z = 0.1-0.2. Clusters are selected using two independent selection methods: a matched filter and a red-sequence color-magnitude technique. The two methods yield consistent results. The cluster mass function is compared with large-scale cosmological simulations. We find a best-fit cluster normalization relation of σ 8Ωm0.6 = 0.33 ± 0.03 (for 0.1 ≲ Ωm ≲ 0.4) or, equivalently, σ8 = (0.16/Ωm)0.6. The amplitude of this relation is significantly lower than the previous canonical value, implying that either Ωm is lower than previously expected (Ωm = 0.16 if σ8 = 1) or σ8 is lower than expected (σ8 = 0.7 if Ωm = 0.3). The shape of the cluster mass function partially breaks this classic degeneracy. We find best-fit parameters of Ωm = 0.19±0.07 0.08 and σ8 = 0.9±0.2 0.3. High values of Ωm (≳ 0.4) and low σ8 (≲ 0.6) are excluded at ≳ 2 σ.

KW - Cosmological parameters

KW - Cosmology: observations

KW - Cosmology: theory

KW - Dark matter

KW - Galaxies: clusters: general

KW - Large-scale structure of universe

UR - http://www.scopus.com/inward/record.url?scp=18344412794&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18344412794&partnerID=8YFLogxK

U2 - 10.1086/345981

DO - 10.1086/345981

M3 - Article

AN - SCOPUS:18344412794

SN - 0004-637X

VL - 585

SP - 182

EP - 190

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

The cluster mass function from early Sloan Digital Sky Survey data: Cosmological implications

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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