Euclid: Early Release Observations – The intracluster light and intracluster globular clusters of the Perseus cluster

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Volume 697 (May 2025)

A&A, 697 (2025) A13

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Table 1

Directly integrated structural parameters from the BCG+ICL surface brightness profiles in different filter bands.

Filter	a_e (kpc)	µ_e (mag arcsec⁻²)	L_{<500 kpc} (10¹² L_⊙)	f_BCG+ICL %
I_E	$92_{- 62}^{+ 198}$ $92_{ - 62}^{ + 198}$	${21.93}_{- 3.43}^{+ 3.64}$ $21.93_{ - 3.43}^{ + 3.64}$	${0.96}_{- 0.42}^{+ 1.20}$ $0.96_{ - 0.42}^{ + 1.20}$	$44_{- 22}^{+ 26}$ $44_{ - 22}^{ + 26}$
Y_E	$143_{- 12}^{+ 14}$ $143_{ - 12}^{ + 14}$	${24.92}_{- 0.14}^{+ 0.13}$ $24.92_{ - 0.14}^{ + 0.13}$	${1.30}_{- 0.06}^{+ 0.09}$ $1.30_{ - 0.06}^{ + 0.09}$	$42_{- 7}^{+ 8}$ $42_{ - 7}^{ + 8}$
J_E	$116_{- 10}^{+ 13}$ $116_{ - 10}^{ + 13}$	${24.50}_{- 0.14}^{+ 0.14}$ $24.50_{ - 0.14}^{ + 0.14}$	${1.29}_{- 0.06}^{+ 0.07}$ $1.29_{ - 0.06}^{ + 0.07}$	$33_{- 6}^{+ 7}$ $33_{ - 6}^{ + 7}$
H_E	$109_{- 5}^{+ 5}$ $109_{ - 5}^{ + 5}$	${24.31}_{- 0.05}^{+ 0.05}$ $24.31_{ - 0.05}^{ + 0.05}$	${1.67}_{- 0.04}^{+ 0.04}$ $1.67_{ - 0.04}^{ + 0.04}$	$38_{- 6}^{+ 6}$ $38_{ - 6}^{ + 6}$

Notes. Derived parameters are the half-light radius along the semimajor axis, a_e, the surface brightness at the half-light radius, µ_e, the total extinction-corrected luminosity within the BCG+ICL in units of solar luminosities, and the fraction of cluster light in the BCG+ICL component, f_BCG+ICL. All parameters were computed by considering only the light within the a = 500 kpc ellipse.

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