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Intracluster stars are believed to be unbound from their progenitor galaxies and diffused throughout the galaxy cluster, creating intracluster light (ICL). However, when and how these stars form are still in debate. To directly constrain…

Astrophysics of Galaxies · Physics 2018-08-08 Jongwan Ko , M. James Jee

We take advantage of a state-of-art semi analytic model of galaxy formation, and the model presented in \citet{contini21a}, to investigate the mass distribution of Brightest Cluster Galaxies (BCGs) and Intra-Cluster Light (ICL) by…

Astrophysics of Galaxies · Physics 2022-04-06 E. Contini , H. Z. Chen , Q. S. Gu

We analyze 700 clusters from the TNG300 hydrodynamical simulation ($M_{200}\geq5\times10^{13} \,M_{\odot}$ at (z=0)) to examine the radial stellar mass distribution of their central objects, consisting of the brightest cluster galaxy (BCG)…

The study of intracluster light can help us to understand the mechanisms taking place in galaxy clusters, and to place constraints on the cluster formation history and physical properties. However, owing to the intrinsic faintness of ICL…

The intra-cluster light (ICL) in observations is usually identified through the surface brightness limit method. In this paper, for the first time we produce the mock images of galaxy groups and clusters using a cosmological hydro-…

Astrophysics of Galaxies · Physics 2018-06-06 Lin Tang , WeiPeng Lin , Weiguang Cui , Xi Kang , Yang Wang , E. Contini , Yu Yu

Intracluster Light (ICL) provides an important record of the interactions galaxy clusters have undergone. However, we are limited in our understanding by our measurement methods. To address this we measure the fraction of cluster light that…

Nearly all intragroup (IGL) and intracluster light (ICL) comes from stars that are not bound to any single galaxy but were formed in galaxies and later unbound from them. In this review we focus on the physical properties - phase space…

Astrophysics of Galaxies · Physics 2022-12-20 Magda Arnaboldi , Ortwin E. Gerhard

We investigate the origin and formation mechanisms of the intra-cluster light (ICL) in The Three Hundred simulations, a set of 324 hydrodynamically resimulated massive galaxy clusters. The ICL, a diffuse component of stars not bound to…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-12 A. Contreras-Santos , A. Knebe , W. Cui , I. Alonso Asensio , C. Dalla Vecchia , R. Haggar , R. A. Mostoghiu Paun , F. R. Pearce , E. Rasia , G. Martin , S. E. Nuza , G. Yepes

We investigate the broadband optical emission of diffuse intergalactic stars in galaxy clusters at z~0.25 by means of an image stacking technique. The images of 654 clusters, selected with the max-BCG algorithm from a subsample of the…

Astrophysics · Physics 2009-11-10 Stefano Zibetti , Simon D. M. White

The bright central galaxies (BCGs) dominate the inner portion of the diffuse cluster light, but it is still unclear where the intracluster light (ICL) takes over. To investigate the BCG-ICL transition, we stack the images of ${\sim}3000$…

Astrophysics of Galaxies · Physics 2022-05-25 Xiaokai Chen , Ying Zu , Zhiwei Shao , Huanyuan Shan

Intracluster stellar populations are a natural result of tidal interactions in galaxy clusters. Measuring these populations is difficult, but important for understanding the assembly of the most massive galaxies. The Coma cluster is one of…

We examine the stellar mass assembly in galaxy cluster cores using data from the Cluster Lensing and Supernova survey with Hubble (CLASH). We measure the growth of brightest cluster galaxy (BCG) stellar mass, the fraction of the total…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-22 Claire Burke , Matt Hilton , Chris Collins

We aim at constraining the assembly history of clusters by studying the intra cluster light (ICL) properties, estimating its contribution to the fraction of baryons in stars, f*, and understanding possible systematics/bias using different…

We present magnitudes and profile fits for 180 galaxies in the central field of the massive lensing cluster Abell 1689 using very deep imaging with the ACS/HST in the F814W bandpass. Previous work revealed an exceptionally large number of…

Astrophysics of Galaxies · Physics 2017-11-01 K. A. Alamo-Martínez , J. P. Blakeslee

We present a robust, apples-to-apples comparison between the photometric properties of the intracluster light (ICL) in the TNG300 magnetohydrodynamic cosmological simulation and those in Wendelstein Wide Field Imager (WWFI) observations.…

We use machine learning to measure the intracluster light (ICL) fractions of 177 galaxy groups and clusters identified from Hyper Suprime-Cam Subaru Strategic Program imaging to explore how the ICL varies with the properties of its host…

Astrophysics of Galaxies · Physics 2025-12-08 Louisa Canepa , Sarah Brough , Mireia Montes , Nina Hatch

Recent studies have highlighted the potential of intracluster light (ICL) as a dark matter tracer. Moreover, the ICL co-evolves with the brightest cluster galaxy (BCG) and the host cluster, making it a valuable tool for understanding…

Astrophysics of Galaxies · Physics 2025-06-23 Jaewon Yoo , Jihye Shin , Ho Seong Hwang , Cristiano G. Sabiu , Hyowon Kim , Jongwan Ko , Jong Chul Lee

The vast majority of stars in galaxy groups are contained within their constituent galaxies. Some small fraction of stars is expected, however, to follow the global dark matter potential of the group. In compact groups, interactions between…

Astrophysics of Galaxies · Physics 2021-03-31 Denis Poliakov , Aleksandr V. Mosenkov , Noah Brosch , Shuki Koriski , R. Michael Rich

We present the most detailed spectrum of the intracluster light (ICL) in an individual cluster to date, the relaxed system RX J2129.7+0005, at $z\sim 0.234$. Using 15 broad-band, deep images observed with HST and JWST in the optical and the…