Differences in baryonic and dark matter scaling relations of galaxy clusters: A comparison between IllustrisTNG simulations and observations

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Volume 698 (June 2025)

A&A, 698 (2025) A237

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Table 2.

Mass notations.

Notation	Galaxy aperture	R_500c	FoF
Dark matter mass in cluster	–	M_dm,500c	M_dm,FoF
Hot-gas mass in cluster	–	M_{hot−gas, 500c}	M_{hot−gas, FoF}
Warm-gas mass in cluster	–	M_{warm−gas, 500c}	M_{warm−gas, FoF}
Cold-gas mass in cluster	–	M_{cold−gas, 500c}	M_{cold−gas, FoF}
Total gas mass in cluster	–	M_gas,500c≡∑_ψM_ψ,500c	M_gas,FoF≡∑_ψM_ψ,FoF
Stellar Mass in cluster	–	M_star,500c	M_star,FoF

Total mass of the cluster	–	M_500c	M_FoF

Sum of stellar mass in galaxies	r_op	$M_{star, r_{op}, 500 c}$ $M_{{\mathrm {star}}, r_{\mathrm {op}}, {\mathrm {500c}}}$ or $M_{star, r_{op}}$ $M_{{\mathrm {star}}, r_{\mathrm {op}}}$	$M_{star, r_{op}, FoF}$ $M_{{\mathrm {star}}, r_{\mathrm {op}}, {\mathrm {FoF}}}$ or $M_{star, r_{op}}$ $M_{{\mathrm {star}}, r_{\mathrm {op}}}$
Sum of stellar mass in galaxies	subfind	M_{star,subfind,500c} or M_star,subfind	M_{star,subfind,FoF} or M_star,subfind

Intra-cluster Light (ICL) mass	r_op	$M_{ICL, r_{op}, 500 c}$ $M_{{\mathrm {ICL}}, r_{\mathrm {op}}, {\mathrm {500c}}}$ or ICL (r_op)	$M_{ICL, r_{op}, FoF}$ $M_{{\mathrm {ICL}}, r_{\mathrm {op}}, {\mathrm {FoF}}}$
Intra-cluster Light (ICL) mass	subfind	M_{ICL,subfind,500c} or ICL (subfind)	M_{ICL,subfind,FoF}

Notes. Mass notations for this study in R_500c and FoF. Includes the mass notations for the dark matter mass, ψ∈ {hot-gas, warm-gas, cold-gas} gas components mass, total gas mass and stellar mass in the cluster, including the total mass notation. Also, includes the notation for the sum of stellar mass in galaxies depending of the galaxy aperture used. Finally, includes the definition and notation of Intra-cluster light (ICL) mass, as the cluster stellar mass minus the total stellar mass in the galaxies (depending of the galaxy aperture). The notations of $M_{star, r_{op}}$ $M_{{\mathrm {star}}, r_{\mathrm {op}}}$ and M_star,subfind are used in Fig. 1. The notations of ICL (r_op) and ICL (subfind) are used in Table 3.

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