Results 81 to 90 of about 80,963 (169)

Giant disk galaxies : Where environment trumps mass in galaxy evolution

, 2015
We identify some of the most HI massive and fastest rotating disk galaxies in the local universe with the aim of probing the processes that drive the formation of these extreme disk galaxies.
Courtois, H. M., Pomarede, D., Sorce, J. G., Zaritsky, D.   +3 more
core   +3 more sources

Galaxias Enanas del Grupo Local

Momento, 2009
The satellite galaxies of the Milky Way are very important both for the studies of the formation and evolution of galaxies and for the research on the dark matter problem. In the present review paper some structural properties of the Local Group, as well
A Casallas Lagos, D J Cubillos, R A Casas Miranda   +2 more
doaj  

The Formation of Galaxy Disks

, 2008
We present a new set of multi-million particle SPH simulations of the formation of disk dominated galaxies in a cosmological context. Some of these galaxies are higher resolution versions of the models already described in Governato et al (2007).
Brook, C., Governato, F., Mayer, L.
core  

X-shaped radio galaxies as observational evidence for the interaction of supermassive binary black holes and accretion disk at pc scale

, 2003
A supermassive black hole binary may form during galaxy mergering. we investigate the interaction of the supermassive binary black holes (SMBBHs) and an accretion disk and show that the detected X-shaped structure in some FRII radio galaxies may be due ...
F. K. Liu, Sudou
core   +1 more source

The First Quenched Galaxies: When and How?

The Astrophysical Journal Letters
Many quiescent galaxies discovered in the early Universe by JWST raise fundamental questions on when and how these galaxies became and stayed quenched. Making use of the latest version of the semianalytic model GAEA that provides good agreement with the ...
Lizhi Xie, Gabriella De Lucia, Fabio Fontanot, Michaela Hirschmann, Yannick M. Bahé, Michael L. Balogh, Adam Muzzin, Benedetta Vulcani, Devontae C. Baxter, Ben Forrest, Gillian Wilson, Gregory H. Rudnick, M. C. Cooper, Umberto Rescigno   +13 more
doaj   +1 more source

The collective origin of spiral structures in disk galaxies

EPJ Web of Conferences, 2012
After almost fifty years the origin of spiral arms in disk galaxies remains one of the major unsolved problems in astrophysics. Recent attempts have indicated that substructures in the dark matter halos of galaxies could induce spiral patterns in disks ...
Hernquist L., Vogelsberger M., D’Onghia E.   +2 more
doaj   +1 more source

A Full Accounting of the Visible Mass in SDSS MaNGA Disk Galaxies

The Astrophysical Journal
We present a study of the ratio of visible mass to total mass in spiral galaxies to better understand the relative amount of dark matter present in galaxies of different masses and evolutionary stages.
Nitya Ravi, Kelly A. Douglass, Regina Demina   +2 more
doaj   +1 more source

MUSE Study of Two Giant Low-surface-brightness Galaxies with Compact Satellites

The Astrophysical Journal
Giant low-surface-brightness galaxies (gLSBGs) are rare objects with disk radii up to 160 kpc and dynamical masses of up to the order of 10 ^12 M _⊙ . Their very existence challenges currently accepted theories of galaxy formation and evolution, as it is
Anna S. Saburova, Damir Gasymov, Ivan S. Gerasimov, Oleg V. Egorov, Igor V. Chilingarian, Fedor M. Kolganov, Anatoly V. Zasov, Evgenii V. Rubtsov, Anton V. Afanasiev, Mariia V. Demianenko   +9 more
doaj   +1 more source

Stochastic 2-D Galaxy disk Evolution Models. Resolved Stellar Populations in the Galaxy M33

Open Astronomy, 2015
We improved the stochastic 2-D galaxy disk models (Mineikis & Vansevičius 2014a) by introducing enriched gas outflows from galaxies and synthetic color-magnitude diagrams of stellar populations.
Mineikis T., Vansevičius V.
doaj   +1 more source

Scattering, Migration, Recircularization and Relaxation to Build out Galaxy Disks with Exponential Profiles

The Astrophysical Journal
Scattering of stars by interstellar clouds or massive clumps increases the stellar velocity dispersion and promotes a radial disk profile that is exponential.
Curtis Struck, Bruce G. Elmegreen, Elena D’Onghia   +2 more
doaj   +1 more source