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Constraining Cosmic Microwave Background Temperature Evolution With Sunyaev–Zel’Dovich Galaxy Clusters from the Atacama Cosmology Telescope

Author(s): Li 李, Yunyang 云炀; Hincks, Adam D; Amodeo, Stefania; Battistelli, Elia S; Bond, J Richard; et al

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Abstract: <jats:title>Abstract</jats:title> <jats:p>The Sunyaev–Zel’dovich (SZ) effect introduces a specific distortion of the blackbody spectrum of the cosmic microwave background (CMB) radiation when it scatters off hot gas in clusters of galaxies. The frequency dependence of the distortion is only independent of the cluster redshift when the evolution of the CMB radiation is adiabatic. Using 370 clusters within the redshift range 0.07 ≲ <jats:italic>z</jats:italic> ≲ 1.4 from the largest SZ-selected cluster sample to date from the Atacama Cosmology Telescope, we provide new constraints on the deviation of CMB temperature evolution from the standard model <jats:inline-formula> <jats:tex-math> <?CDATA $\alpha ={0.017}_{-0.032}^{+0.029}$?> </jats:tex-math> <mml:math xmlns:mml="" overflow="scroll"> <mml:mi>α</mml:mi> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mrow> <mml:mn>0.017</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.032</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.029</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> <jats:inline-graphic xmlns:xlink="" xlink:href="apjac26b6ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>, where <jats:inline-formula> <jats:tex-math> <?CDATA $T(z)={T}_{0}{\left(1+z\right)}^{1-\alpha }$?> </jats:tex-math> <mml:math xmlns:mml="" overflow="scroll"> <mml:mi>T</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mi>z</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>=</mml:mo> <mml:msub> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:msup> <mml:mrow> <mml:mfenced close=")" open="("> <mml:mrow> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mi>z</mml:mi> </mml:mrow> </mml:mfenced> </mml:mrow> <mml:mrow> <mml:mn>1</mml:mn> <mml:mo>−</mml:mo> <mml:mi>α</mml:mi> </mml:mrow> </mml:msup> </mml:math> <jats:inline-graphic xmlns:xlink="" xlink:href="apjac26b6ieqn2.gif" xlink:type="simple" /> </jats:inline-formula>. This result is consistent with no deviation from the standard adiabatic model. Combining it with previous, independent data sets we obtain a joint constraint of <jats:italic>α</jats:italic> = −0.001 ± 0.012. Attributing deviation from adiabaticity to the decay of dark energy, this result constrains its effective equation of state <jats:inline-formula> <jats:tex-math> <?CDATA ${w}_{\mathrm{eff}}=-{0.998}_{-0.010}^{+0.008}$?> </jats:tex-math> <mml:math xmlns:mml="" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>w</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>eff</mml:mi> </mml:mrow> </mml:msub> <mml:mo>=</mml:mo> <mml:mo>−</mml:mo> <mml:msubsup> <mml:mrow> <mml:mn>0.998</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.010</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.008</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> <jats:inline-graphic xmlns:xlink="" xlink:href="apjac26b6ieqn3.gif" xlink:type="simple" /> </jats:inline-formula>.</jats:p>
Publication Date: 26-Nov-2021
Electronic Publication Date: 26-Nov-2021
Citation: Li 李, Yunyang 云炀, Hincks, Adam D, Amodeo, Stefania, Battistelli, Elia S, Bond, J Richard, Calabrese, Erminia, Choi, Steve K, Devlin, Mark J, Dunkley, Jo, Ferraro, Simone, Gluscevic, Vera, Guan, Yilun, Halpern, Mark, Hilton, Matt, Hlozek, Renee, Marriage, Tobias A, McMahon, Jeff, Moodley, Kavilan, Naess, Sigurd, Nati, Federico, Niemack, Michael D, Orlowski-Scherer, John, Page, Lyman, Partridge, Bruce, Salatino, Maria, Schaan, Emmanuel, Schillaci, Alessandro, Sehgal, Neelima, Sifón, Cristóbal, Staggs, Suzanne T, van Engelen, Alexander, Wollack, Edward J, Xu, Zhilei. (2021). Constraining Cosmic Microwave Background Temperature Evolution With Sunyaev–Zel’Dovich Galaxy Clusters from the Atacama Cosmology Telescope. The Astrophysical Journal, 922 (2), 136 - 136. doi:10.3847/1538-4357/ac26b6
DOI: doi:10.3847/1538-4357/ac26b6
ISSN: 0004-637X
EISSN: 1538-4357
Pages: 136 - 136
Type of Material: Journal Article
Journal/Proceeding Title: The Astrophysical Journal
Version: Author's manuscript

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