Results 71 to 80 of about 3,622,393 (232)

Dynamical Models of Elliptical Galaxies [PDF]

Symposium - International Astronomical Union, 1975
Self-consistent dynamical models of elliptical galaxies have been constructed using a modification of the Prendergast-Tomer algorithm. They reproduce many of the observed properties of elliptical galaxies.
openaire   +1 more source

Azimuthal Misalignments in Stellar Warp Structure as Dynamical Tracers of Mergers in Milky Way–like Galaxies

The Astrophysical Journal Letters
We investigate the origin of warps in stellar disks using high-resolution Milky Way analogs from the IllustrisTNG50 simulation. Focusing on galaxies that experienced a major merger, we identify a characteristic azimuthal misalignment between the warp ...
Lekshmi Thulasidharan, Elena D’Onghia, Robert Benjamin   +2 more
doaj   +1 more source

The dynamics of galaxy pairs in a cosmological setting [PDF]

, 2013
We use the Millennium Simulation, and an abundance-matching framework, to investigate the dynamical behaviour of galaxy pairs embedded in a cosmological context.
J. Moreno, A. Bluck, S. Ellison, D. Patton, P. Torrey, B. Moster   +5 more
semanticscholar   +1 more source

The AGORA High-resolution Galaxy Simulations Comparison Project. VIII. Disk Formation and Evolution of Simulated Milky Way Mass Galaxy Progenitors at 1 < z < 5

The Astrophysical Journal
We investigate how differences in the stellar feedback produce disks with different morphologies in Milky Way–like progenitors over 1 ≤ z ≤ 5, using eight state-of-the-art cosmological hydrodynamics simulation codes in the AGORA project.
Minyong Jung, Ji-hoon Kim, Thịnh Hũ’u Nguyễn, Ramón Rodríguez-Cardoso, Santi Roca-Fàbrega, Joel R. Primack, Kirk S. S. Barrow, Anna Genina, Pablo Granizo, Hyeonyong Kim, Kentaro Nagamine, Yuri Oku, Johnny W. Powell, Yves Revaz, Héctor Velázquez, Alessandro Lupi, Ikkoh Shimizu, Tom Abel, Oscar Agertz, Renyue Cen, Daniel Ceverino, Avishai Dekel, Chaerin Jeong, Lucio Mayer, Boon Kiat Oh, Thomas R. Quinn, Hyunmi Song, AGORA Collaboration   +27 more
doaj   +1 more source

Dynamical difference between the cD galaxy and the stellar diffuse component in simulated galaxy clusters

, 2010
Member galaxies within galaxy clusters nowadays can be routinely identified in cosmological, hydrodynamical simulations using methods based on identifying self bound, locally over dense substructures.
Arnaboldi, Arnaboldi, Arnaboldi, Aubert, Bertschinger, Biviano, Borgani, Byrd, Castro-Rodriguez, Castro-Rodríguez, Davis, Diemand, Doherty, Dolag, Dolag, Durrell, Eisenstein, Feldmeier, Feldmeier, Feldmeier, Frenk, G. Murante, Gal-Yam, Gelb, Gerhard, Gerhard, Gill, Gnedin, Gonzalez, Gonzalez, Hoffman, K. Dolag, Kim, Klypin, Knollmann, Kolatt, Krick, Krick, Lacey, Maciejewski, Mathis, Merritt, Mihos, Monaco, Moore, Murante, Murante, Napolitano, Neyrinck, Rudick, S. Borgani, Salpeter, Saro, Sommer-Larsen, Springel, Springel, Springel, Springel, Stanghellini, Tornatore, Tornatore, van Kampen, Weinberg, Willman, Zibetti   +64 more
core   +1 more source

Distinct Acceleration Relations of Galaxies and Galaxy Clusters from Hyperconical Modified Gravity

The Astrophysical Journal
General relativity (GR) is the most successful theory of gravity, with great observational support on local scales. However, to keep GR valid over cosmic scales, some phenomena require the assumption of exotic dark matter, especially the cosmic expansion
Robert Monjo, Indranil Banik
doaj   +1 more source

Lopsidedness of cluster galaxies in modified gravity

, 2010
We point out an interesting theoretical prediction for elliptical galaxies residing inside galaxy clusters in the framework of modified Newtonian dynamics (MOND), that could be used to test this paradigm.
A. Knebe, Benoit Famaey, C. Llinares, F. Combes, F. Donato ., G. Gentile, G.W. Angus, H. Zhao, HongSheng Zhao, L. Ciotti, P. Londrillo, P.J.E. Peebles, S.S. McGaugh, Xufen Wu   +13 more
core   +2 more sources

Turbulent Gas-rich Disks at High Redshift: Origin of Thick Stellar Disks Through 3D “Baryon Sloshing”

The Astrophysical Journal
In response to recent observations from JWST and Atacama Large Millimeter Array, we explore a new class of dynamically self-consistent models that mimics a plausible progenitor of the Milky Way over a wide range of disk gas fractions, f _gas .
Joss Bland-Hawthorn, Thor Tepper-Garcia, Oscar Agertz, Christoph Federrath, Misha Haywood, Paola di Matteo, Timothy R. Bedding, Takafumi Tsukui, Emily Wisnioski, Melissa Ness, Ken Freeman   +10 more
doaj   +1 more source

Internal dynamics of the galaxy cluster Abell 545

, 2011
Diffuse radio emission in galaxy clusters, and their connection with cluster mergers, are still debated. We seek to explore the internal dynamics of the radio halo cluster Abell 545.
Abell, Anders, Ashman, Bacchi, Bardelli, Barrena, Barrena, Barrena, Beers, Beers, Beers, Beers, Beers, Bekki, Bell, Bertin, Binggelli, Bird, Biviano, Bonafede, Boschin, Boschin, Boschin, Boschin, Brunetti, Bullock, Buote, Buote, Böhringer, Carlberg, Cassano, Cassano, Cassano, Cassano, Cassano, Cavaliere, Chilingarian, Chilingarian, D. Eckert, Danese, David, den Hartog, Dolag, Dolag, Donnert, Dressler, Dubinsky, Ellingson, Ensslin, Ensslin, Ensslin, Fadda, Fasano, Ferrari, Ferrari, Ferrari, Finoguenov, Fukugita, Giovannini, Giovannini, Girardi, Girardi, Girardi, Girardi, Girardi, Girardi, Goto, Govoni, Hashimoto, Henriksen, Henry, Hoeft, Kalberla, Kennicutt, Kneib, Landolt, Leccardi, Leccardi, Limber, Lin, Liu, Loeb, M. Girardi, M. Rossetti, Malumuth, Markevitch, Markevitch, Mastropietro, Menci, Merritt, Million, Mushotzky, Navarro, Niederste-Ostholt, Nieto, Okabe, Owers, Pinkney, Pisani, Pisani, Quintana, R. Barrena, Ramella, Ramella, Ricker, Rines, Roettiger, Roettiger, Roettiger, Rossetti, Rudick, S. De Grandi, Salinas, Salinas, Sarazin, Sastry, Schlegel, Schneider, Springel, Struble, Struble, The, Tonry, Tribble, van Dokkum, W. Boschin, Wainer, West, White   +128 more
core   +1 more source

THE RESOLVED STRUCTURE AND DYNAMICS OF AN ISOLATED DWARF GALAXY: A VLT AND KECK SPECTROSCOPIC SURVEY OF WLM [PDF]

, 2012
We present spectroscopic data for 180 red giant branch (RGB) stars in the isolated dwarf irregular galaxy Wolf–Lundmark–Mellote (WLM). Observations of the calcium II triplet lines in spectra of RGB stars covering the entire galaxy were obtained with ...
R. Leaman, K. Venn, A. Brooks, G. Battaglia, A. Cole, R. Ibata, M. Irwin, A. McConnachie, J. Mendel, E. Tolstoy   +9 more
semanticscholar   +1 more source