2024MNRAS.534..251K

Query : 2024MNRAS.534..251K

2024MNRAS.534..251K - Mon. Not. R. Astron. Soc., 534, 251-270 (2024/October-2)

Relativistic SZ temperatures and hydrostatic mass bias for massive clusters in the FLAMINGO simulations.

KAY S.T., BRASPENNING J., CHLUBA J., HELLY J.C., KUGEL R., SCHALLER M. and SCHAYE J.

Abstract (from CDS):

The relativistic Sunyaev-Zel'dovich (SZ) effect can be used to measure intracluster gas temperatures independently of X-ray spectroscopy. Here, we use the large-volume FLAMINGO simulation suite to determine whether SZ y-weighted temperatures lead to more accurate hydrostatic mass estimates in massive ( $M_{\rm 500c} \gt 7.5\times 10^{14}\, {\rm M}_{\odot }$ ) clusters than when using X-ray spectroscopic-like temperatures. We find this to be the case, on average. The median bias in the SZ mass at redshift zero is $\left\langle b \right\rangle \equiv 1-\left\langle M_{\rm 500c,hse}/M_{\rm 500c,true} \right\rangle = -0.05 \pm 0.01$ , over 4 times smaller in magnitude than the X-ray spectroscopic-like case, $\left\langle b \right\rangle = 0.22 \pm 0.01$ . However, the scatter in the SZ bias, $\sigma _{b} \approx 0.2$ , is around 40 per cent larger than for the X-ray case. We show that this difference is strongly affected by clusters with large pressure fluctuations, as expected from shocks in ongoing mergers. Selecting the clusters with the best-fitting generalized NFW pressure profiles, the median SZ bias almost vanishes, $\left\langle b \right\rangle = -0.009 \pm 0.005$ , and the scatter is halved to $\sigma _{b} \approx 0.1$ . We study the origin of the SZ/X-ray difference and find that, at $R_{\rm 500c}$ and in the outskirts, SZ weighted gas better reflects the hot, hydrostatic atmosphere than the X-ray weighted gas. The SZ/X-ray temperature ratio increases with radius, a result we find to be insensitive to variations in baryonic physics, cosmology, and numerical resolution.

Journal keyword(s): methods: numerical - galaxies: clusters: general - galaxies: clusters: intracluster medium - large-scale structure of Universe - X-rays: galaxies: clusters

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ClG J1347-1145	ClG	13 47 30.5	-11 45 07						~	577	0

Query : 2024MNRAS.534..251K

Basic data :

ClG J1347-1145 -- Cluster of Galaxies
Other object types:	`ClG (2004A&A,ClG,...)`, `X (1AXG,2MAXI,...)`, `gLe (2013MNRAS)`, `C?G (2014A&A,XCLASS)`, `Gr? ([VLB2012])`
ICRS coord. (ep=J2000) :	`13 47 30.5 -11 45 07 (X-ray) [ ] E 2021A&A...652A..12K`
FK4 coord. (ep=B1950 eq=1950) :	`13 44 50.6 -11 30 10 [ ]`
Gal coord. (ep=J2000) :	`324.0371 +48.8086 [ ]`
Radial velocity / Redshift / cz :	`V(km/s) 106534 [~] / z(spectroscopic) 0.4500 [~] / cz 134907 [~] (Opt) D 2021A&A...652A..12K`
Angular size (arcmin):	`2.0 2.0 ~ (Rad) D` `2015ApJ...813...77Y`

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`ClG J1347-1145`	`MCS J1347.5-1144`	`RBS 1316`	`1RXS J134730.5-114455`
`1AXG J134731-1144`	`MCXC J1347.5-1144`	`RXC J1347.5-1145`	`XCLASS 20538`
`BAX 206.8833-11.7617`	`PSZ1 G324.05+48.79`	`RXC J1347.5-1144`	`[VLB2012] 19`
`LCDCS 0829`	`PSZ2 G324.04+48.79`	`RX J1347.5-1145`
`2MAXI J1348-117`	`PSZRX G324.05+48.81`	`RX J1347.1-1145`

References (577 between 1850 and 2026) (Total 577)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : ClG J1347-1145

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RXC J1347.5-1145 RXC J1347.5-1144 1RXS J134730.5-114455

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