Kinematics of the diffuse intragroup and intracluster light in groups and clusters of galaxies in the local universe within 100 Mpc distance by Magda Arnaboldi, Ortwin Gerhard

“…Their light fractions relative to the total luminosity of the satellite galaxies in a given group or cluster are between a few to ten percent, significantly lower than the average values in more evolved, more distant clusters. …”
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Atomic hydrogen in IllustrisTNG galaxies: the impact of environment parallelled with local 21-cm surveys by Stevens, Adam RH, Diemer, Benedikt, Lagos, Claudia del P, Nelson, Dylan, Pillepich, Annalisa, Brown, Toby, Catinella, Barbara, Hernquist, Lars, Weinberger, Rainer, Vogelsberger, Mark, Marinacci, Federico

“…We use TNG100 to explore the H i content, star formation activity, and angular momentum of satellite galaxies, each as a function of environment, and find that satellites are typically a factor of ≳33 poorer in H i than centrals of the same stellar mass, with the exact offset depending sensitively on parent halo mass. …”
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An extended halo around an ancient dwarf galaxy by Chiti, Anirudh, Frebel, Anna, Simon, Joshua D, Erkal, Denis, Chang, Laura J, Necib, Lina, Ji, Alexander P, Jerjen, Helmut, Kim, Dongwon, Norris, John E

“…The Milky Way is surrounded by dozens of ultrafaint (<105 L☉) dwarf satellite galaxies1–3. They are the remnants of the earliest galaxies4, as confirmed by their ancient5 and chemically primitive6,7 stars. …”
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The splashback boundary of haloes in hydrodynamic simulations by O’Neil, Stephanie, Barnes, David J, Vogelsberger, Mark, Diemer, Benedikt

“…We apply our analysis to dark matter, gas, and satellite galaxies associated with haloes to investigate the observational potential of Rsp. …”
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Galaxy Zoo: The Environmental Dependence of Bars and Bulges in Disc Galaxies by Skibba, R, Masters, K, Nichol, R, Zehavi, I, Hoyle, B, Edmondson, E, Bamford, S, Cardamone, C, Keel, W, Lintott, C, Schawinski, K

“…Finally, by analyzing the projected clustering of barred and unbarred disc galaxies with halo occupation models, we argue that barred galaxies are in slightly higher-mass haloes than unbarred ones, and some of them (approximately 25%) are satellite galaxies in groups. We also discuss implications about the effects of minor mergers and interactions on bar formation.…”

Accretion, feedback and galaxy bimodality: a comparison of the GalICS semi-analytic model and cosmological SPH simulations by Cattaneo, A, Blaizot, J, Weinberg, D, Colombi, S, Dave, R, Devriendt, J, Guiderdoni, B, Katz, N, Keres, D

“…Our results imply that the observational failings of the SPH simulation and the no-feedback GalICS model are a consequence of missing input physics rather than computational inaccuracies, that truncating gas accretion by satellite galaxies automatically produces a bimodal galaxy distribution with a red sequence, but that explaining the red colours of the most massive galaxies requires a mechanism like AGN feedback that suppresses the accretion onto central galaxies in large haloes.…”

nIFTy Cosmology: the clustering consistency of galaxy formation models by Pujol, A, Skibba, R, Gaztañaga, E, Benson, A, Blaizot, J, Bower, R, Carretero, J, Castander, F, Cattaneo, A, Cora, S, Croton, D, Cui, W, Cunnama, D, Lucia, G, Devriendt, J, Elahi, P, Font, A, Fontanot, F, Garcia-Bellido, J, Gargiulo, I, Gonzalez-Perez, V, Helly, J, Henriques, B, Hirschmann, M, Knebe, A, Lee, J, Mamon, G, Monaco, P, Onions, J, Padilla, N, Pearce, F, Power, C, Somerville, R, Srisawat, C, Thomas, P, Tollet, E, Vega-Martínez, C, Yi, S

“…We also show that galaxy formation models that do not include orphan satellite galaxies have a significantly lower 2PCF on small scales, consistent with previous studies. …”

MIGHTEE-HI: HI galaxy properties in the large scale structure environment at z ∼ 0.37 from a stacking experiment by Sinigaglia, F, Rodighiero, G, Elson, E, Bianchetti, A, Vaccari, M, Maddox, N, Ponomareva, AA, Frank, BS, Jarvis, MJ, Catinella, B, Cortese, L, Roychowdhury, S, Baes, M, Collier, JD, Ilbert, O, Khostovan, AA, Kurapati, S, Pan, H, Prandoni, I, Rajohnson, SHA, Salvato, M, Sekhar, S, Sharma, G

“…We report an HI excess compared to the full sample in satellite galaxies (MHI = (11.31 ± 1.22) × 109, at ∼10.2σ) and in filaments (MHI = (11.62 ± 0.90) × 109. …”

Shell-type Tidal Features Are More Frequently Detected in Slowly Rotating Early-type Galaxies than Stream- and Tail-type Features by Yongmin Yoon, Jongwan Ko, Haeun Chung, Woowon Byun, Kyungwon Chun

“…The detection of shells in slightly more massive ETGs compared to streams and tails may be attributed to the fact that massive satellite galaxies are more likely to be accreted through radial orbits, due to the nature of dynamical friction.…”
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Beyond Ultra-diffuse Galaxies. I. Mass–Size Outliers among the Satellites of Milky Way Analogs by Jiaxuan Li, Jenny E. Greene, Johnny P. Greco, Song Huang, Peter Melchior, Rachael Beaton, Kirsten Casey, Shany Danieli, Andy Goulding, Remy Joseph, Erin Kado-Fong, Ji Hoon Kim, Lauren A. MacArthur

“…As a case study, we surveyed 922 Milky Way analogs in the nearby Universe (0.01 < z < 0.04) and built a large sample of satellite galaxies that are outliers in the mass–size relation. …”
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Mock Observations: Formation and Evolution of Diffuse Light in Galaxy Groups and Clusters in the IllustrisTNG Simulations by Lin Tang, Weipeng Lin, Yang Wang, Jing Li, Yanyao Lan

“…In this paper, by analyzing mock images from the IllustrisTNG100-1 simulation, we examine the properties of diffuse light and compare them to those of central and satellite galaxies. Our findings suggest that the majority of the diffuse light originates from satellites. …”
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Ram Pressure Stripping in the EAGLE Simulation by Andrea Kulier, Bianca Poggianti, Stephanie Tonnesen, Rory Smith, Alessandro Ignesti, Nina Akerman, Antonino Marasco, Benedetta Vulcani, Alessia Moretti, Anna Wolter

“…Ram pressure stripping of satellite galaxies is thought to be a ubiquitous process in galaxy clusters, and a growing number of observations reveal satellites at different stages of stripping. …”
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ELVES. III. Environmental Quenching by Milky Way–mass Hosts by Jenny E. Greene, Shany Danieli, Scott Carlsten, Rachael Beaton, Fangzhou Jiang, Jiaxuan Li

“…We explore the balance of quiescent and star-forming galaxies (quenched fractions) for a sample of ∼400 satellite galaxies around 30 Local Volume hosts from the Exploration of Local VolumE Satellites (ELVES) Survey. …”
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An extended halo around an ancient dwarf galaxy by Chiti, Anirudh, Frebel, Anna, Simon, Joshua D., Erkal, Denis, Chang, Laura J., Necib, Lina, Ji, Alexander P., Jerjen, Helmut, Kim, Dongwon, Norris, John E.

“…The Milky Way is surrounded by dozens of ultrafaint (<105 L☉) dwarf satellite galaxies1–3. They are the remnants of the earliest galaxies4, as confirmed by their ancient5 and chemically primitive6,7 stars. …”
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A missing outskirts problem? Comparisons between stellar haloes in the Dragonfly Nearby Galaxies Survey and the TNG100 simulation by Merritt, Allison, Pillepich, Annalisa, van Dokkum, Pieter, Nelson, Dylan, Hernquist, Lars, Marinacci, Federico, Vogelsberger, Mark

“…Although we are unable to identify any single adjustment that fully reconciles the differences between the observed and simulated galaxy outskirts, we find that artificially delaying the disruption of satellite galaxies and reducing the spatial extent of in-situ stellar populations result in improved matches between the outer profile shapes and stellar halo masses, respectively. …”
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A missing outskirts problem? Comparisons between stellar haloes in the Dragonfly Nearby Galaxies Survey and the TNG100 simulation by Merritt, Allison, Pillepich, Annalisa, van Dokkum, Pieter, Nelson, Dylan, Hernquist, Lars, Marinacci, Federico, Vogelsberger, Mark

“…Although we are unable to identify any single adjustment that fully reconciles the differences between the observed and simulated galaxy outskirts, we find that artificially delaying the disruption of satellite galaxies and reducing the spatial extent of in-situ stellar populations result in improved matches between the outer profile shapes and stellar halo masses, respectively. …”
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Joint galaxy–galaxy lensing and clustering constraints on galaxy formation by Renneby, Malin, Henriques, Bruno MB, Hilbert, Stefan, Nelson, Dylan, Vogelsberger, Mark, Angulo, Raúl E, Springel, Volker, Hernquist, Lars

“…By decreasing the merger time for satellite galaxies as well as reducing the radio-mode active galactic nucleus accretion efficiency in the SAM, we obtain better agreement, both for the lensing and the clustering, at the high-mass end. …”
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Spatial Distribution of Intracluster Light versus Dark Matter in Horizon Run 5 by Jaewon Yoo, Changbom Park, Cristiano G. Sabiu, Ankit Singh, Jongwan Ko, Jaehyun Lee, Christophe Pichon, M. James Jee, Brad K. Gibson, Owain Snaith, Juhan Kim, Jihye Shin, Yonghwi Kim, Hyowon Kim

“…Furthermore, we find a recipe for tracing dark matter in unrelaxed clusters by including the most massive satellite galaxies together with the BCG+ICL distribution. …”
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Prospects for Detecting Gaps in Globular Cluster Stellar Streams in External Galaxies with the Nancy Grace Roman Space Telescope by Christian Aganze, Sarah Pearson, Tjitske Starkenburg, Gabriella Contardo, Kathryn V. Johnston, Kiyan Tavangar, Adrian M. Price-Whelan, Adam J. Burgasser

“…Stellar streams form through the tidal disruption of satellite galaxies or globular clusters orbiting a host galaxy. …”
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VERTICO. VII. Environmental Quenching Caused by the Suppression of Molecular Gas Content and Star Formation Efficiency in Virgo Cluster Galaxies by Toby Brown, Ian D. Roberts, Mallory Thorp, Sara L. Ellison, Nikki Zabel, Christine D. Wilson, Yannick M. Bahé, Dhruv Bisaria, Alberto D. Bolatto, Alessandro Boselli, Aeree Chung, Luca Cortese, Barbara Catinella, Timothy A. Davis, María J. Jiménez-Donaire, Claudia D. P. Lagos, Bumhyun Lee, Laura C. Parker, Rory Smith, Kristine Spekkens, Adam R. H. Stevens, Vicente Villanueva, Adam B. Watts

“…We study how environment regulates the star formation cycle of 33 Virgo Cluster satellite galaxies on 720 pc scales. We present the resolved star-forming main sequence for cluster galaxies, dividing the sample based on their global H i properties and comparing to a control sample of field galaxies. …”
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