MODELING OF THE HERMES SUBMILLIMETER SOURCE LENSED BY A DARK MATTER DOMINATED FOREGROUND GROUP OF GALAXIES by Gavazzi, R, Cooray, A, Conley, A, Aguirre, J, Amblard, A, Auld, R, Beelen, A, Blain, A, Blundell, R, Bock, J, Bradford, C, Bridge, C, Brisbin, D, Burgarella, D, Chanial, P, Chapin, E, Christopher, N, Clements, D, Cox, P, Djorgovski, S, Dowell, C, Eales, S, Earle, L, Ellsworth-Bowers, T, Farrah, D

“…This shows that HERMES is lensed by a galaxy group-size dark matter halo at redshift z l ∼ 0.6. …”

Revealing Hanny's Voorwerp: radio observations of IC 2497 by Jozsa, G, Garrett, M, Oosterloo, T, Rampadarath, H, Paragi, Z, Arkel, H, Lintott, C, Keel, W, Schawinski, K, Edmondson, E

“…Another cloud complex is located at the position of a small galaxy group ~100 kpc to the West of IC 2497 with a mass of 2.9E9 Msol. …”

Systematically Measuring Ultradiffuse Galaxies (SMUDGes). IV. Ultradiffuse Satellites of Milky Way Analogs by Hina Goto, Dennis Zaritsky, Ananthan Karunakaran, Richard Donnerstein, David J. Sand

“…We find that: (1) the projected radial distribution of UDG satellites (projected surface density ∝ r ^−0.84±0.06 ) is consistent with that of normal satellite galaxies; (2) the number of UDG satellites per MWA ( S _UDG ) is ∼0.5 ± 0.1 over projected radii from 20 to 250 kpc and −17 < M _r < −13.5; (3) S _UDG is consistent with a linear extrapolation of the relationship between the number of UDGs per halo versus halo mass obtained over galaxy group and cluster scales; (4) red UDG satellites dominate the population of UDG satellites (∼80%); (5) over the range of satellite magnitudes studied, UDG satellites comprise ∼10% of the satellite galaxy population of MWAs; and (6) a significant fraction of these (∼13%) have estimated total masses >10 ^10.9 M _⊙ or, equivalently, at least half the halo mass of the LMC, and populate a large fraction (∼18%) of the expected subhalos down to these masses. …”
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Galaxy Zoo: the dependence of morphology and colour on environment by Bamford, S, Nichol, R, Baldry, I, Land, K, Lintott, C, Schawinski, K, Slosar, A, Szalay, A, Thomas, D, Torki, M, Andreescu, D, Edmondson, E, Miller, C, Murray, P, Raddick, M, Vandenberg, J

“…We also present many of our results as functions of the distance to the nearest galaxy group. This confirms that the environmental trends we present are not specific to the manner in which environment is quantified, but nevertheless provides plain evidence for an environmental process at work in groups. …”

The Intermittency of Turbulence in Magneto-Hydodynamical Simulations and in the Cosmos by Pierre Lesaffre, Edith Falgarone, Pierre Hily-Blant

“…The power of the combination of modelling and observations is also illustrated by the observations of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>CH</mi><mo>+</mo></msup></semantics></math></inline-formula> cation that provide unique quantitative information on the kinetic energy trail in the massive, multi-phase and turbulent circum-galactic medium of a galaxy group at redshift <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>z</mi><mo>=</mo><mn>2.8</mn></mrow></semantics></math></inline-formula>.…”
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The Cosmic Ultraviolet Baryon Survey (CUBS) – I. Overview and the diverse environments of Lyman limit systems at z &lt; 1 by Chen, Hsiao-Wen, Zahedy, Fakhri S, Boettcher, Erin, Cooper, Thomas M, Johnson, Sean D, Rudie, Gwen C, Chen, Mandy C, Walth, Gregory L, Cantalupo, Sebastiano, Cooksey, Kathy L, Faucher-Giguère, Claude-André, Greene, Jenny E, Lopez, Sebastian, Mulchaey, John S, Penton, Steven V, Petitjean, Patrick, Putman, Mary E, Rafelski, Marc, Rauch, Michael, Schaye, Joop, Simcoe, Robert A, Weiner, Benjamin J

“…A diverse range of galaxy properties is seen around these LLSs, from a low-mass dwarf galaxy pair, a co-rotating gaseous halo/disc, a star-forming galaxy, a massive quiescent galaxy, to a galaxy group. The closest galaxies have projected distances ranging from d = 15 to 72 pkpc and intrinsic luminosities from ${\approx} 0.01\, L_*$ to ${\approx} 3\, L_*$. …”
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The Cosmic Ultraviolet Baryon Survey (CUBS) – I. Overview and the diverse environments of Lyman limit systems at z &lt; 1 by Chen, Hsiao-Wen, Zahedy, Fakhri S, Boettcher, Erin, Cooper, Thomas M, Johnson, Sean D, Rudie, Gwen C, Chen, Mandy C, Walth, Gregory L, Cantalupo, Sebastiano, Cooksey, Kathy L, Faucher-Giguère, Claude-André, Greene, Jenny E, Lopez, Sebastian, Mulchaey, John S, Penton, Steven V, Petitjean, Patrick, Putman, Mary E, Rafelski, Marc, Rauch, Michael, Schaye, Joop, Simcoe, Robert A., Weiner, Benjamin J

“…A diverse range of galaxy properties is seen around these LLSs, from a low-mass dwarf galaxy pair, a co-rotating gaseous halo/disc, a star-forming galaxy, a massive quiescent galaxy, to a galaxy group. The closest galaxies have projected distances ranging from d = 15 to 72 pkpc and intrinsic luminosities from ${\approx} 0.01\, L_*$ to ${\approx} 3\, L_*$. …”
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Identification of Galaxy Protoclusters Based on the Spherical Top-hat Collapse Theory by Jaehyun Lee, Changbom Park, Juhan Kim, Christophe Pichon, Brad K. Gibson, Jihye Shin, Yonghwi Kim, Owain N. Snaith, Yohan Dubois, C. Gareth Few

“…We adopt the conventional definition that a protocluster is a galaxy group whose virial mass M _vir < M _cl at its epoch, where M _cl = 10 ^14 M _⊙ , but would exceed that limit when it evolves to z = 0. …”
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The ATLAS(3D) project-XIII. Mass and morphology of HI in early-type galaxies as a function of environment by Serra, P, Oosterloo, T, Morganti, R, Alatalo, K, Blitz, L, Bois, M, Bournaud, F, Bureau, M, Cappellari, M, Crocker, A, Davies, R, Davis, T, de Zeeuw, P, Duc, P, Emsellem, E, Khochfar, S, Krajnovic, D, Kuntschner, H, Lablanche, P, McDermid, R, Naab, T, Sarzi, M, Scott, N, Trager, S, Weijmans, A

“…This confirms the importance of processes occurring on a galaxy-group scale for the evolution of ETGs. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.…”

The JWST Discovery of the Triply Imaged Type Ia “Supernova H0pe” and Observations of the Galaxy Cluster PLCK G165.7+67.0 by Brenda L. Frye, Massimo Pascale, Justin Pierel, Wenlei Chen, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Seth H. Cohen, Patrick S. Kamieneski, Rogier A. Windhorst, Anton M. Koekemoer, Pat Kelly, Jake Summers, Michael Engesser, Daizhong Liu, Lukas J. Furtak, Maria del Carmen Polletta, Kevin C. Harrington, S. P. Willner, Jose M. Diego, Rolf A. Jansen, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Jordan C. J. D’Silva, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Ashish K. Meena, Mario Nonino, Rafael Ortiz III, Nor Pirzkal, Aaron Robotham, Russell E. Ryan Jr., Lou Strolger, Scott Tompkins, Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin

“…The total (unobscured and obscured) SFR of this second galaxy group is estimated to be (≳ 100 M _⊙ yr ^−1 ), which translates to a supernova rate of ∼1 SNe yr ^−1 , suggesting that regular monitoring of this cluster may yield additional SNe.…”
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The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies by Brenda L. Frye, Massimo Pascale, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Paulina Soto Robles, Jake Summers, Carlos Diaz, Patrick Kamieneski, Lukas J. Furtak, Seth H. Cohen, Jose Diego, Benjamin Beauchesne, Rogier A. Windhorst, S. P. Willner, Anton M. Koekemoer, Adi Zitrin, Gabriel Caminha, Karina I. Caputi, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Simon P. Driver, Norman A. Grogin, Kevin Harrington, Rolf A. Jansen, Jean-Paul Kneib, Matt Lehnert, James Lowenthal, Madeline A. Marshall, Felipe Menanteau, Belén Alcalde Pampliega, Nor Pirzkal, Mari Polletta, Johan Richard, Aaron Robotham, Russell E. Ryan Jr., Michael J. Rutkowski, Christóbal Sifón, Scott Tompkins, Daniel Wang, Haojing Yan, Min S. Yun

“…We contribute one new member to the previously known z = 4.32 galaxy group. Intrinsic (delensed) positions of the five secure group members span a physical extent of ∼60 kpc. 13 additional candidates selected by spectroscopic/photometric constraints are small and faint, with a mean intrinsic luminosity ∼2.2 mag fainter than L ^* . …”
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The Physical Properties of the Groups of Galaxies by Lorenzo Lovisari, Stefano Ettori

“…Galaxy groups consist of a few tens of galaxies bound in a common gravitational potential [...]…”
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On the Origin and Evolution of the Intra-Cluster Light: A Brief Review of the Most Recent Developments by Emanuele Contini

“…Not all the light in galaxy groups and clusters comes from stars that are bound to galaxies. …”
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The evolution of the star formation activity per halo mass up to redshift ∼1.6 as seen by Herschel by Popesso, P, Biviano, A, Rodighiero, G, Baronchelli, I, Salvato, M, Saintonge, A, Finoguenov, A, Magnelli, B, Gruppioni, C, Pozzi, F, Lutz, D, Elbaz, D, Altieri, B, Andreani, P, Aussel, H, Berta, S, Capak, P, Cava, A, Cimatti, A, Coia, D, Daddi, E, Dannerbauer, H, Dickinson, M, Dasyra, K, Fadda, D

“…Up to redshift z ∼ 0.2, the field has a higher Σ(SFR)/M than galaxy groups and galaxy clusters. At higher redshifts, galaxy groups and the field have similar Σ(SFR)/M, while massive clusters have significantly lower Σ(SFR)/M than both groups and the field. …”

Constraining AGN feedback model with SZ profile by Tanimura Hideki, Hinshaw Gary, McCarthy Ian G., Van Waerbeke Ludovic, Aghanim Nabila, Ma Yin-Zhe, Mead Alexander, Tröster Tilman, Hojjati Alireza, Moraes Bruno

“…Relativistic jets from AGN have a wide range of impacts on galaxy groups and clusters and are key for understanding their formation and physical properties. …”
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Ultra Deep Catalogue of Galaxy Structures in the Cosmic Evolution Survey field by Söchting, I, Coldwell, G, Clowes, R, Campusano, L, Graham, M

“…This paper presents a large sample of intermediate- to high-redshift galaxy groups and clusters detected using a fully automated search in the Cosmic Evolution Survey field. …”

Revisiting X-Ray-bright Optically Normal Galaxies with the Chandra Source Catalog by Dong-Woo Kim, Amanda Malnati, Alyssa Cassity, Giuseppina Fabbiano, Juan Rafael Martinez Galarza, Ewan O’Sullivan

“…These characteristics suggest that they may be unidentified galaxy groups and clusters. Using the X-ray luminosity functions of QSOs, galaxies, groups and clusters, we estimate the approximate fraction of extended XBONGs to be <20%. …”
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COSMOLOGICAL PERTURBATIONS IN PRESENCE OF SCALAR FIELDS by A. Yu. Burgazli, M. Eingorn, A. Zhuk

“…We investigate the role of the scalar field assuming its presence at late stages of the Universe evolution together with dust presented by a system of an arbitrary number of gravitating masses (galaxies, groups of galaxies and clusters of galaxies) and the cosmological constant in the framework of the theory of scalar cosmological perturbations. …”
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Galaxy And Mass Assembly (GAMA): The environments of high- and low-excitation radio galaxies by Ching, J, Croom, S, Sadler, E, Robotham, A, Brough, S, Baldry, I, Bland-Hawthorn, J, Colless, M, Driver, S, Holwerda, B, Hopkins, A, Jarvis, M, Johnston, H, Kelvin, L, Liske, J, Loveday, J, Norberg, P, Pracy, M, Steele, O, Thomas, D, Wang, L

“…In our analysis we use the fifth nearest neighbour density ($\Sigma_{5}$) and the GAMA galaxy groups catalogue (G3Cv6) and construct control samples of galaxies matched in {\update stellar mass and colour} to the radio-detected sample. …”

Measuring the Hubble Constant of Binary Neutron Star and Neutron Star–Black Hole Coalescences: Bright Sirens and Dark Sirens by Jiming Yu, Zhengyan Liu, Xiaohu Yang, Yu Wang, Pengjie Zhang, Xin Zhang, Wen Zhao

“…We find in the third generation era, the host galaxy groups of around 45% BNS mergers at z < 0.1 can be identified through this method, if the equation of state is ms1, which is roughly equivalent to the results from luminosity distant constraints. …”
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