Results 21 to 30 of about 2,647 (76)

Bulge formation from SSCs in a responding cuspy dark matter halo [PDF]

, 2007
We simulate the bulge formation in very late-type dwarf galaxies from circumnuclear super star clusters (SSCs) moving in a responding cuspy dark matter halo (DMH). The simulations show that (1) the response of DMH to sinking of SSCs is detectable only in
Cora S. A., Huang J.-H., Jie‐Hao Huang, Liu W. H., Wen‐Hao Liu, Yan‐Ning Fu, Zu‐Gan Deng   +6 more
core   +3 more sources

An extensive study of dynamical friction in dwarf galaxies: the role of stars, dark matter, halo profiles and MOND

, 2006
We investigate the in-spiraling timescales of globular clusters in dwarf spheroidal (dSph) and dwarf elliptical (dE) galaxies, due to dynamical friction. We address the problem of these timescales having been variously estimated in the literature as much
Begeman, Bekenstein, Binney, Binney, Binney, Blais-Ouellette, Bottema, Brada, Buonanno, Ciotti, Coleman, Colpi, De Blok, De Blok, Dubath, F. J. Sánchez-Salcedo, Fall, Fuchs, Gentile, Gentile, Goerdt, Gunn, Hashimoto, Hayashi, Held, Hernandez, Hernandez, Hodge, Hubble, Jin, Jorge Reyes-Iturbide, Just, Kazantzidis, King, Kleyna, Kleyna, Kleyna, Kregel, Lacey, Lake, Lotz, Mackey, Magorrian, Mateo, Mayer, McGaugh, Milgrom, Milgrom, Navarro, Navarro, Oh, Pointecouteau, Pryor, Read, Read, Sanders, Sanders, Spekkens, Stoehr, Sánchez-Salcedo, Sánchez-Salcedo, Sánchez-Salcedo, Taffoni, The, Tremaine, Van Den Bosch, Walcher, Walker, Walker, Wang, White, X. Hernandez, Łokas, Łokas, Łokas, Łokas   +75 more
core   +1 more source

The Structural and Kinematic Evolution of Central Star Clusters in Dwarf Galaxies and Their Dependence on Dark Matter Halo Profiles

, 2018
Through a suite of direct N-body simulations, we explore how the structural and kinematic evolution of a star cluster located at the center of a dwarf galaxy is affected by the shape of its host's dark matter density profile.
Vesperini, Enrico, Webb, Jeremy J.
core   +1 more source

The structure of dark matter halos in hierarchical clustering theories [PDF]

, 1999
During hierarchical clustering, smaller masses generally collapse earlier than larger masses and so are denser on the average. The core of a small mass halo could be dense enough to resist disruption and survive undigested, when it is incorporated into a
Barrow J. D., Bartelmann M., Cole S. M., Lahav O., Narayan R., Navarro J. F., Padmanabhan T., Padmanabhan T., Sikvie P., Steinmetz M., Subramanian K., Subramanian K., Subramanian K., Tormen G.   +13 more
core   +3 more sources

Density Profiles of Cold Dark Matter Substructure: Implications for the Missing Satellites Problem

, 2004
The structural evolution of substructure in cold dark matter (CDM) models is investigated combining ``low-resolution'' satellites from cosmological N-body simulations of parent halos with N=10^7 particles with high-resolution individual subhalos orbiting
Ben Moore, Binney J., Chiara Mastropietro, Eke V. R., Fall S. M., Joachim Stadel, Jurg Diemand, Kauffmann G., Klypin A., Lucio Mayer, Stelios Kazantzidis   +10 more
core   +1 more source

The real and apparent convergence of N-body simulations of the dark matter structures: is the Navarro-Frenk-White profile real?

, 2014
We consider the reasons why a cuspy NFW-like profile persistently occurs in N-body simulations, in contradiction to some astronomical observations. The routine method of testing the convergence of N-body simulations (in particular, the negligibility of ...
Baushev, Anton N.
core   +1 more source

Contradiction between strong lensing statistics and a feedback solution to the cusp/core problem

, 2010
Standard cosmology has many successes on large scales, but faces some fundamental difficulties on small, galactic scales. One such difficulty is the cusp/core problem.
Barnes, Bartelmann, Begeman, Broadhurst, Chen, Chen, Chiba, Choi, Da-Ming Chen, de Blok, de Blok, Gnedin, Hennawi, Huterer, Jing, Jing, Kazantzidis, Komatsu, Kormendy, Kuzio de Naray, Kuzio de Naray, Li, Li, McGaugh, McGaugh, Navarro, Oguri, Oguri, Schneider, Sellwood, Stacy McGaugh, Zhang   +31 more
core   +1 more source

Cuspy No More: How Outflows Affect the Central Dark Matter and Baryon Distribution in Lambda CDM Galaxies

, 2012
We examine the evolution of the inner dark matter (DM) and baryonic density profile of a new sample of simulated field galaxies using fully cosmological, Lambda CDM, high resolution SPH + N-Body simulations.
A. M. Brooks, A. Pontzen, A. Zolotov, Abdo, Adams, Agertz, Ahn, Avila Reese, Barnes, Bell, Belokurov, Benson, Bigiel, Bode, Bower, Boylan-Kolchin, Brook, Brooks, Brooks, Bruzual, Bullock, C. Christensen, Ceverino, Chemin, Choi, Christensen, Colín, Conroy, Croft, Dalal, Dalcanton, Dalcanton, Davé, de Blok, de Blok, de Souza, Dekel, Dekel, Dekel, Del Popolo, Donato, Eke, El-Zant, Elmegreen, Elson, Evans, F. Governato, Fall, Feldmann, Flores, Font, Geha, Geha, Gentile, Gnedin, Gnedin, Goerdt, Goerdt, Governato, Governato, Governato, Guedes, Haardt, Hopkins, J. Wadsley, Katz, Kazantzidis, Kennicutt, Kereš, Kirby, Knebe, Knollmann, Koda, Koposov, Krumholz, Kuzio de Naray, Lackner, Li, Loeb, Lovell, Macciò, Macciò, Macciò, Martin, Martinez, Mashchenko, Mashchenko, Mayer, Mayer, McGaugh, McQuinn, Mo, Moore, Moore, Moster, Navarro, Navarro, Navarro, Oh, Oh, Oh, Oppenheimer, Parry, Peñarrubia, Pontzen, Pontzen, Pontzen, Primack, Quinn, Rashkov, Read, Reed, Riess, Romano-Díaz, S. H. Oh, S. Shen, Saitoh, Shapley, Shen, Simon, Simon, Spergel, Spergel, Springel, Stadel, Stinson, Stoehr, Strigari, Strigari, Stringer, Swaters, Swaters, Sánchez-Janssen, T. Quinn, Tollerud, Tollerud, Tonini, van den Bosch, van der Wel, Viel, Vogelsberger, Wadsley, Walker, Walker, Walter, Willman, Zhang, Zolotov   +147 more
core   +1 more source

Contraction of Dark Matter Halos in Response to Condensation of Baryons

, 2005
The cooling of baryons in the centers of dark matter halos leads to a more concentrated dark matter distribution. This effect has traditionally been calculated using the model of adiabatic contraction, which assumes spherical symmetry, while in ...
Gnedin, Oleg Y.
core   +1 more source

The Effect of a Single Supernova Explosion on the Cuspy Density Profile of a Small-Mass Dark Matter Halo

, 2011
Some observations of galaxies, and in particular dwarf galaxies, indicate a presence of cored density profiles in apparent contradiction with cusp profiles predicted by dark matter N-body simulations.
Abel, Alvarez, Binney, Burkert, Coccato, Cuddeford, de Blok, de Blok, de Blok, de Blok, de Souza, de Souza, Dehnen, Dekel, Donato, E. E. O. Ishida, Gnedin, Gnedin, Governato, Hensler, Jarosik, Kazantzidis, Kitayama, Kitayama, Kravtsov, Kuzio de Naray, L. F. S. Rodrigues, Mac Low, Mashchenko, Mashchenko, Moore, Mori, Mori, Mori, Murakami, Navarro, Navarro, Navarro, Ostriker, Pasetto, Pedrosa, Peñarrubia, R. Opher, R. S. de Souza, Read, Rindler-Daller, Rodrigues, Sakuma, Salucci, Tonini, Vasiliev, Whalen, Whalen, Wise, Zhao   +54 more
core   +1 more source