Galaxy groups at 0.3 ≤ z ≤ 0.55 - II. Evolution to z ∼ 0 by Wilman, D, Balogh, M, Bower, R, Mulchaey, J, Oemler, A, Carlberg, R, Eke, V, Lewis, I, Morris, S, Whitaker, R

GAMA+KiDS: Alignment of galaxies in galaxy groups and its dependence on galaxy scale by Georgiou, C, Chisari, N, Fortuna, M, Hoekstra, H, Kuijken, K, Joachimi, B, Vakili, M, Bilicki, M, Dvornik, A, Erben, T, Giblin, B, Heymans, C, Napolitano, N, Shan, H

“…In this work, we measure the alignment of shapes of satellite galaxies, in galaxy groups, with respect to the brightest group galaxy (BGG), as well as alignments of the BGG shape with the satellite positions, using the highly complete Galaxy And Mass Assembly (GAMA) spectroscopic survey and deep imaging from the Kilo Degree Survey. …”

Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue by Eke, V, Baugh, C, Cole, S, Frenk, C, Norberg, P, Peacock, J, Baldry, I, Bland-Hawthorn, J, Bridges, T, Cannon, R, Colless, M, Collins, C, Couch, W, Dalton, G, De Propris, R, Driver, S, Efstathiou, G, Ellis, R, Glazebrook, K, Jackson, C, Lahav, O, Lewis, I, Lumsden, S, Maddox, S, Madgwick, D

Galaxy groups in the Two-degree Field Galaxy Redshift Survey: the luminous content of the groups by Eke, V, Frenk, C, Baugh, C, Cole, S, Norberg, P, Peacock, J, Baldry, I, Bland-Hawthorn, J, Bridges, T, Cannon, R, Colless, M, Collins, C, Couch, W, Dalton, G, de Propris, R, Driver, S, Efstathiou, G, Ellis, R, Glazebrook, K, Jackson, C, Lahav, O, Lewis, I, Lumsden, S, Maddox, S, Madgwick, D

Galaxy groups in the 2dFGRS: The group-finding algorithm and the 2PIGG catalogue by Eke, V, Baugh, C, Cole, S, Frenk, C, Norberg, P, Peacock, J, Baldry, I, Bland-Hawthorn, J, Bridges, T, Cannon, R, Colless, M, Collins, C, Couch, W, Dalton, G, De Propris, R, Driver, S, Efstathiou, G, Ellis, R, Glazebrook, K, Jackson, C, Lahav, O, Lewis, I, Lumsden, S, Maddox, S, Madgwick, D

“…The construction of a catalogue of galaxy groups from the Two-degree Field Galaxy Red-shift Survey (2dFGRS) is described. …”

Galaxy groups in the two-degree field galaxy redshift survey: The luminous content of the groups by Eke, V, Frenk, C, Baugh, C, Cole, S, Norberg, P, Peacock, J, Baldry, I, Bland-Hawthorn, J, Bridges, T, Cannon, R, Colless, M, Collins, C, Couch, W, Dalton, G, De Propris, R, Driver, S, Efstathiou, G, Ellis, R, Glazebrook, K, Jackson, C, Lahav, O, Lewis, I, Lumsden, S, Maddox, S, Madgwick, D

“…The Two-degree Field Galaxy Redshift Survey (2dFGRS) Percolation-Inferred Galaxy Group (2PIGG) catalogue of ∼29 000 objects is used to study the luminous content of galaxy systems of various sizes. …”

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

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Shaken Snow Globes: Kinematic Tracers of the Multiphase Condensation Cascade in Massive Galaxies, Groups, and Clusters by Gaspari, M, McDonald, M, Hamer, SL, Brighenti, F, Temi, P, Gendron-Marsolais, M, Hlavacek-Larrondo, J, Edge, AC, Werner, N, Tozzi, P, Sun, M, Stone, JM, Tremblay, GR, Hogan, MT, Eckert, D, Ettori, S, Yu, H, Biffi, V, Planelles, S

“…We propose a novel method to constrain turbulence and bulk motions in massive galaxies, galaxy groups, and clusters, exploring both simulations and observations. …”
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Shaken Snow Globes: Kinematic Tracers of the Multiphase Condensation Cascade in Massive Galaxies, Groups, and Clusters by Gaspari, M, McDonald, Michael A., Hamer, SL, Brighenti, F, Temi, P, Gendron-Marsolais, M, Hlavacek-Larrondo, J, Edge, AC, Werner, N, Tozzi, P, Sun, M, Stone, JM, Tremblay, GR, Hogan, MT, Eckert, D, Ettori, S, Yu, H, Biffi, V, Planelles, S

“…We propose a novel method to constrain turbulence and bulk motions in massive galaxies, galaxy groups, and clusters, exploring both simulations and observations. …”
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The 2dF QSO Redshift Survey - X. Lensing of Background QSOs by Galaxy Groups by Myers, A, Outram, P, Shanks, T, Boyle, B, Croom, S, Loaring, N, Miller, L, Smith, R

“…We use an objective algorithm to detect galaxy groups. A 3sigma anti-correlation is observed between QSOs and galaxy groups. …”

The relation between the diffuse X-ray luminosity and the radio power of the central AGN in galaxy groups by Pasini, T, Brueggen, M, de Gasperin, F, Birzan, L, O'Sullivan, E, Finoguenov, A, Whittam, IH, Heywood, I, Jarvis, M, Gitti, M, Brighenti, F, Collier, JD, Gozaliasl, G

“…However, it is much less clear how feedback operates in galaxy groups, which have shallower gravitational potentials. …”

Detection of Pairwise Kinetic Sunyaev–Zel’dovich Effect with DESI Galaxy Groups and Planck in Fourier Space by Shaohong Li, Yi Zheng, Ziyang Chen, Haojie Xu, Xiaohu Yang

“…We report a ∼5.2 σ detection of the kinetic Sunyaev–Zel’dovich (kSZ) effect in Fourier space, by combining the DESI galaxy groups and the Planck data. We use the density-weighted pairwise kSZ power spectrum as the summary statistic, and the detailed procedure of its measurement is presented in this paper. …”
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MIGHTEE-HI: discovery of an H I-rich galaxy group at z = 0.044 with MeerKAT by Ranchod, S, Deane, RP, Ponomareva, AA, Blecher, T, Frank, BS, Jarvis, MJ, Maddox, N, Mulaudzi, W, Glowacki, M, Hess, KM, Tudorache, M, Verdes-Montenegro, L, Verdes-Montenegro, L, Adams, NJ, Bowler, RAA, Collier, JD, Taylor, R

“…The discovery of this galaxy group is an example of the importance of mapping spatially resolved H I in a wide range of environments, including galaxy groups. …”

Galaxy Groups at 0.3 <= z <= 0.55. II. Evolution to z ~ 0 by Wilman, D, Balogh, M, Bower, R, Mulchaey, J, Jnr, A, Carlberg, R, Eke, V, Lewis, I, Morris, S, Whitaker, R

Optical Observations of M81 Galaxy Group in Narrow Band [SII] and H_alpha Filters: Holmberg IX by Arbutina, B., Ilić, D., Stavrev, K., Urošević, D., Vukotić, B., Onić, D.

“…We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and H$alpha$ filters, carried out in March and November 2008 with the 2m RCC telescope at NAO Rozhen, Bulgaria. …”
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The RESOLVE and ECO Gas in Galaxy Groups Initiative: The Group Finder and the Group H i–Halo Mass Relation by Zackary L. Hutchens, Sheila J. Kannappan, Andreas A. Berlind, Mehnaaz Asad, Kathleen D. Eckert, David V. Stark, Derrick S. Carr, Ella R. Castelloe, Andrew J. Baker, Kelley M. Hess, Amanda J. Moffett, Mark A. Norris, Darren Croton

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Cosmological Simulations of Galaxy Groups and Clusters. III. Constraining Quasar Feedback Models with the Atacama Large Millimeter Array by Avinanda Chakraborty, Suchetana Chatterjee, Mark Lacy, Soumya Roy, Samrat Roy, Rudrani Kar Chowdhury

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Optical observations of M81 galaxy group in narrow band [SII] and Hα filters: Holmberg IX by Arbutina B., Ilić D., Stavrev K., Urošević D., Vukotić B., Onić D.

“…We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and Hα filters, carried out in March and November 2008 with the 2m RCC telescope at NAO Rozhen, Bulgaria. …”
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CH+(1-0) in a z~2.8 galaxy group: Probe of multi-phasic turbulent gas reservoirs by Vidal-García Alba, Falgarone Edith, Battaia Fabrizio Arrigoni, Godard Benjamin, Ivison Rob J., Zwaan Martin A., Herrera Cinthya, Frayer David, Andreani Paola, Li Quong, Gavazzi Raphaël, Bergin Edwin, Walter Fabian, Omont Alain

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LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group by Clarke, A, Heald, G, Jarrett, T, Bray, J, Hardcastle, M, Cantwell, T, Scaife, A, Brienza, M, Bonafede, A, Breton, R, Broderick, J, Carbone, D, Croston, J, Farnes, J, Harwood, J, Heesen, V, Horneffer, A, van der Horst, A, Iacobelli, M, Jurusik, W, Kokotanekov, G, McKean, J, Morabito, L, Mulcahy, D, Nikiel-Wroczyñski, B, Orrú, E, Paladino, R, Pandey-Pommier, M, Pietka, M, Pizzo, R, Pratley, L, Riseley, C, Rottgering, H, Rowlinson, A, Sabater, J, Sendlinger, K, Shulevski, A, Sridhar, S, Stewart, A, Tasse, C, van Velzen, S, van Weeren, R, Wise, M