Results 31 to 40 of about 656,580 (174)

Properties of Early-Type, Dry Galaxy Mergers and the Origin of Massive Elliptical Galaxies [PDF]

Astrophys.J.636:L81-L84,2006, 2005
The luminosity dependence of kinematical and isophotal properties of elliptical galaxies is investigated using numerical simulations of galaxy merging, combined with semi-analytical models of hierarchical structure formation. Mergers of spiral galaxies as the only formation mechanism for elliptical galaxies can neither reproduce the kinematical and ...
arxiv   +1 more source

Mayall II = G1 in M31: Giant Globular Cluster or Core of a Dwarf Elliptical Galaxy? [PDF]

, 2001
At the moment, only the anticorrelation of metallicity with age recently observed in ω Centauri suggests that this cluster enriched itself over a timescale of about 3 Gyr.
G. Meylan, G. Meylan, G. Meylan, A. Sarajedini, P. Jablonka, S. Djorgovski, T. Bridges, R. Rich   +7 more
semanticscholar   +1 more source

Binary Stellar Population Synthesis Study of Elliptical Galaxies [PDF]

Chin.J.Astron.Astrophys.6:669-679,2006, 2006
We determine relative stellar ages and metallicities mainly for about 80 elliptical galaxies in low and high density environments via the latest binary stellar population (BSP) synthesis model and test a latest hierarchical formation model of elliptical galaxies which adopted the new $\Lambda$CDM cosmology for the first time.
arxiv   +1 more source

Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC 4552 in the Virgo Cluster [PDF]

, 2006
We use a 54.4 ks Chandra observation to study nuclear outflow activity in NGC 4552 (M89), an elliptical galaxy in the Virgo Cluster. Chandra images in the 0.5-2 keV band show two ringlike features ~1.7 kpc in diameter in the core of NGC 4552, as reported
M. Machacek, P. Nulsen, C. Jones, W. Forman   +3 more
semanticscholar   +1 more source

Numerical modelling of Auriga's Wheel - a new ring galaxy

, 2012
We model the formation of Auriga's Wheel - a recently discovered collisional ring galaxy. Auriga's Wheel has a number of interesting features including a bridge of stars linking the neighbouring elliptical to the ring galaxy, and evidence for components ...
Appleton, Appleton, Arp, B. C. Conn, Bender, Buta, Charmandaris, Conn, de Vaucouleurs, D’Onghia, Englmaier, Few, Few, Fosbury, Freeman, Gavazzi, Gerber, Gerber, Gerhard, Ghosh, Gingold, Hernquist, Hernquist, Hernquist, Hernquist, Hoag, Horellou, Huang, Joy, Katz, Lynds, M. Fellhauer, Mapelli, Mapelli, Mapelli, McMillan, Mihos, Mo, Navarro, Portas, R. R. Lane, R. Smith, Schweizer, Smith, Stark, Struck, Struck-Marcell, Tamburro, Theis, Theys, Toomre, Toomre, Wallin, Weinzirl, Williams, Williams, Łokas   +56 more
core   +1 more source

Fresh Activity in Old Systems: Radio AGN in Fossil Groups of Galaxies

, 2012
We present the first systematic 1.4 GHz Very Large Array radio continuum survey of fossil galaxy group candidates. These are virialized systems believed to have assembled over a gigayear in the past through the merging of galaxy group members into a ...
Bîrzan, Cisternas, Condon, Corbin, D'Onghia, David, De Robertis, Eric M. Wilcots, Jones, Kelley M. Hess, La Barbera, Mendes de Oliveira, Mendes de Oliveira, Mulchaey, Santos, Schawinski, Sun, Thomson, Tozzi, Ulmer, van Gorkom, Victoria L. Hartwick, Vikhlinin, White, Wise, Yamagata   +25 more
core   +1 more source

Radial Kinematics of Isolated Elliptical Galaxies [PDF]

, 2006
Ellipticals in very low density environments are extremely rare but hold important clues about galaxy formation and evolution. In this paper we continue our study of isolated elliptical galaxies, presenting results on the radial stellar kinematics for 13 isolated early-type galaxies.
arxiv   +1 more source

Structural properties of dwarf elliptical galaxies and the connection with (ordinary) elliptical galaxies [PDF]

2005, IAU Colloquia 198, p.303-310, 2005
This article reviews the popular reasons for the belief that dwarf elliptical galaxies and (ordinary) elliptical galaxies are distinct and separate species. They include: light-profile shape (or similarly image concentration); the magnitude-central surface brightness diagram; the magnitude-effective surface brightness diagram (or similarly the ...
arxiv   +1 more source

Formation, Evolution and Properties of Isolated Field Elliptical Galaxies [PDF]

, 2010
[Abridged] We study the properties, evolution and formation mechanisms of isolated field elliptical galaxies. We create a mock catalogue of isolated field elliptical galaxies from the Millennium Simulation Galaxy Catalogue, and trace their merging histories.
arxiv   +1 more source

Collisionless evaporation from cluster elliptical galaxies [PDF]

, 2003
We describe a particular aspect of the effects of the parent cluster tidal field (CTF) on stellar orbits inside cluster Elliptical galaxies. In particular we discuss, with the aid of a simple numerical model, the possibility that collisionless stellar ...
Adams, Arnaboldi, Arnaboldi, Arnaboldi, Ciotti, Ciotti, Dehnen, Durrell, Feldmeier, Ferguson, Ferrers, Hawley, Hernquist, L. Ciotti, Merritt, Merritt, Merritt, Moore, Muccione, Méndez, Napolitano, Nipoti, Okamura, Roberts, Theuns, Thompson, Totani, Trevese, V. Muccione, Valluri   +29 more
core   +4 more sources