%0 Generic %1 butler2021measurement %A Butler, Victoria %A Feder, Richard M. %A Daylan, Tansu %A Mantz, Adam B. %A Mercado, Dale %A Montana, Alfredo %A Portillo, Stephen K. N. %A Sayers, Jack %A Vaughan, Benjamin J. %A Zemcov, Michael %A Zitrin, Adi %D 2021 %K tifr %T Measurement of the Relativistic Sunyaev-Zeldovich Corrections in RX J1347.5-1145 %U http://arxiv.org/abs/2110.13932 %X We present a measurement of the relativistic corrections to the thermal Sunyaev-Zel'dovich (SZ) effect spectrum, the rSZ effect, toward the massive galaxy cluster RX J1347.5-1145 by combining sub-mm images from Herschel-SPIRE with mm-wave Bolocam maps. Our analysis simultaneously models the SZ effect signal, the population of cosmic infrared background (CIB) galaxies, and galactic cirrus dust emission in a manner that fully accounts for their spatial and frequency-dependent correlations. Gravitational lensing of background galaxies by RX J1347.5-1145 is included in our methodology based on a mass model derived from HST observations. Utilizing a set of realistic mock observations, we employ a forward modelling approach that accounts for the non-Gaussian covariances between observed astrophysical components to determine the posterior distribution of SZ effect brightness values consistent with the observed data. We determine a maximum a posteriori (MAP) value of the average Comptonization parameter of the intra-cluster medium (ICM) within R$_2500$ to be $y \rangle_2500 = 1.56 10^-4$, with corresponding 68~per cent credible interval $1.42,1.63 10^-4$, and a MAP ICM electron temperature of $T_sz \rangle_2500 = 22.4$~keV with 68~per cent credible interval spanning $10.4,33.0$~keV. This is in good agreement with the pressure-weighted temperature obtained from Chandra X-ray observations, $T_x,pw\rangle_2500 = 17.4 2.3$~keV. We aim to apply this methodology to comparable existing data for a sample of 39 galaxy clusters, with an estimated uncertainty on the ensemble mean $T_sz \rangle_2500$ at the $1$~keV level, sufficiently precise to probe ICM physics and to inform X-ray temperature calibration.

@misc{butler2021measurement, abstract = {We present a measurement of the relativistic corrections to the thermal Sunyaev-Zel'dovich (SZ) effect spectrum, the rSZ effect, toward the massive galaxy cluster RX J1347.5-1145 by combining sub-mm images from Herschel-SPIRE with mm-wave Bolocam maps. Our analysis simultaneously models the SZ effect signal, the population of cosmic infrared background (CIB) galaxies, and galactic cirrus dust emission in a manner that fully accounts for their spatial and frequency-dependent correlations. Gravitational lensing of background galaxies by RX J1347.5-1145 is included in our methodology based on a mass model derived from HST observations. Utilizing a set of realistic mock observations, we employ a forward modelling approach that accounts for the non-Gaussian covariances between observed astrophysical components to determine the posterior distribution of SZ effect brightness values consistent with the observed data. We determine a maximum a posteriori (MAP) value of the average Comptonization parameter of the intra-cluster medium (ICM) within R$_{2500}$ to be $\langle y \rangle_{2500} = 1.56 \times 10^{-4}$, with corresponding 68~per cent credible interval $[1.42,1.63] \times 10^{-4}$, and a MAP ICM electron temperature of $\langle \textrm{T}_{\textrm{sz}} \rangle_{2500} = 22.4$~keV with 68~per cent credible interval spanning $[10.4,33.0]$~keV. This is in good agreement with the pressure-weighted temperature obtained from {\it Chandra} X-ray observations, $\langle \textrm{T}_{\textrm{x,pw}}\rangle_{2500} = 17.4 \pm 2.3$~keV. We aim to apply this methodology to comparable existing data for a sample of 39 galaxy clusters, with an estimated uncertainty on the ensemble mean $\langle \textrm{T}_{\textrm{sz}} \rangle_{2500}$ at the $\simeq 1$~keV level, sufficiently precise to probe ICM physics and to inform X-ray temperature calibration.}, added-at = {2021-10-28T07:02:55.000+0200}, author = {Butler, Victoria and Feder, Richard M. and Daylan, Tansu and Mantz, Adam B. and Mercado, Dale and Montana, Alfredo and Portillo, Stephen K. N. and Sayers, Jack and Vaughan, Benjamin J. and Zemcov, Michael and Zitrin, Adi}, biburl = {https://www.bibsonomy.org/bibtex/2ca2b878a86468c7d11631ccd2f26ca9e/citekhatri}, description = {Measurement of the Relativistic Sunyaev-Zeldovich Corrections in RX J1347.5-1145}, interhash = {d630d2ca9e8e4d3ec47a79e301f778ce}, intrahash = {ca2b878a86468c7d11631ccd2f26ca9e}, keywords = {tifr}, note = {cite arxiv:2110.13932Comment: 20 pages, 9 figures}, timestamp = {2021-10-28T07:02:55.000+0200}, title = {Measurement of the Relativistic Sunyaev-Zeldovich Corrections in RX J1347.5-1145}, url = {http://arxiv.org/abs/2110.13932}, year = 2021 }