Results 71 to 80 of about 80,653 (165)

Chemo-dynamical evolution of Globular Cluster Systems

, 2002
We studied the relation between the ratio of rotational velocity to velocity dispersion and the metallicity (/\sigma_{v}-metallicity relation) of globular cluster systems (GCS) of disk galaxies by comparing the relation predicted from simple chemo ...
Arimoto N., Burton W. B., Frenk C. S., Georgiev T. B., Georgiev T. B., Kinman T. D., Kissler-Patig M., Maline G., Masanori Iye, Miyamoto M., Patsis P. A., Rees M. J., Tinsley B. M., van der Hulst J. M., Yoshihiko Saito, Zepf S. E.   +15 more
core   +2 more sources

The Formation of Disk Galaxies [PDF]

Symposium - International Astronomical Union, 1988
In this talk, I will discuss a few particular topics, rather than attempting a general review of the formation of disk galaxies. First recall the basic structure and kinematics of a disk galaxy like the Milky Way. The Table below lists the four main structural components as they are presently understood, and gives typical masses, and (if known) the ...
openaire   +1 more source

Ram pressure stripping of halo gas in disk galaxies: Implications on galactic star formation in different environments

, 2009
We numerically investigate evolution of gaseous halos around disk galaxies in different environments ranging from small groups to rich clusters in order to understand galaxy evolution in these environments.
Abadi, Balogh, Balogh, Balogh, Bamford, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Binney, Couch, Dressler, Dressler, Font, Freeman, Hester, Jeltema, Kapferer, Kawata, Kenji Bekki, Kronberger, Larson, Marcolini, McCarthy, Navarro, Padmanabhan, Poggianti, Poggianti, Rasmussen, Roediger, Sellwood, Sembach, Sugimoto, Tonnesen, Vollmer, Wielen, Wilman   +40 more
core   +1 more source

Outside-in Shrinking of the Star-forming Disk of Dwarf Irregular Galaxies

, 2011
We have studied multi-band surface brightness profiles of a representative sample of 34 nearby dwarf irregular galaxies (dIrrs). Our data include GALEX FUV/NUV, UBV, H\alpha, and Spitzer 3.6 \mum images.
Andreas Schruba, Bakos, Bell, Bernard, Blitz, Boissier, Bruce G. Elmegreen, Chabrier, Charlot, Chiappini, Cole, Combes, Croxall, Dalcanton, Dale, de Jong, de Vaucouleurs, Debattista, Deidre A. Hunter, Dolphin, Dolphin, Elmegreen, Elmegreen, Engelbracht, Fazio, Gallart, Gnedin, Gogarten, Greggio, Helou, Hidalgo, Hidalgo, Hong-Xin Zhang, Hummer, Hunter, Hunter, Hunter, Hunter, Hunter, Jansen, Johnson, Karachentsev, Kennicutt, Kennicutt, Kobulnicky, Larson, Lee, Lee, Lee, Lee, Leitherer, Leroy, Lin, Lynden-Bell, Mac Low, MacArthur, Martin, Martin, Mayer, McConnachie, Meurer, Mihos, Mori, Muhle, Muñoz-Mateos, Muñoz-Mateos, Orban, Roskar, Salim, Schlegel, Sheth, Shi, Skillman, Stil, Stinson, Susa, Tajiri, Taylor, Thilker, Tolstoy, Vader, van Zee, van Zee, Wang, Weisz, Weisz, Werner, Williams, Williams, Wong, Wyder, Wyder, Wyder, Yang, Youngblood, Yu Gao, Zhao   +96 more
core   +1 more source

The Disk of Our Galaxy [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe review our knowledge about the spiral structure of the disk of our Galaxy using tracers of star formation. These tracers reveal a 4-arm picture of the Galaxy.
openaire   +1 more source

Are Dwarf Galaxies Dominated by Dark Matter?

, 2011
Mass models for a sample of 18 late-type dwarf and low surface brightness galaxies show that in almost all cases the contribution of the stellar disks to the rotation curves can be scaled to explain most of the observed rotation curves out to two or ...
Begeman, Bell, Bershady, Binggeli, Bizyaev, Bosma, Bottema, Bottema, Broeils, Broeils, Casertano, Côté, Côté, Côté, de Blok, de Blok, de Blok, de Grijs, Dutton, Israel, J. M. van der Hulst, Kalnajs, Kim, Nilson, Noordermeer, Persic, Pfenniger, R. A. Swaters, R. Sancisi, Rhee, Sackett, Sancisi, Sancisi, Sanders, Schwarzkopf, Simon, Skillman, Spekkens, Sung, Swaters, Swaters, Swaters, T. S. van Albada, Valenzuela, Verheijen   +44 more
core   +2 more sources

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

Retarded Gravity in Disk Galaxies

Symmetry
Disk galaxies have a typical dimension of a few tens of kiloparsecs. It follows from the theory of general relativity that any signal originating from the galactic center will be noticed at the outskirts of the galaxy only tens of thousands of years later.
Yuval Glass, Tomer Zimmerman, Asher Yahalom   +2 more
openaire   +1 more source

Superbubbles in disk galaxies

The Astrophysical Journal, 1988
Correlated supernovae from an OB association create a superbubble: a large, thin, shell of cold gas surrounding a hot pressurized interior. Because supernova blast waves usually become subsonic before reaching the walls of the shell or cooling radiatively, the energy input from supernovae may be reasonably approximated as a continuous luminosity. Using
Mordecai-Mark Mac Low, Richard McCray
openaire   +1 more source

The Stability of Galaxy Disks

, 2013
We calculate the stellar surface mass density (Sigma_*) and two-component (gas+stars) disk stability (Q_RW) for 25 late-type galaxies from the DiskMass Survey. These calculations are based on fits of a dynamical model to our ionized-gas and stellar kinematic data performed using a Markov Chain Monte Carlo sampling of the Bayesian posterior ...
Westfall, K. B., Andersen, D. R., Bershady, M. A., Martinsson, T. P. K., Swaters, R. A., Verheijen, M. A. W.   +5 more
openaire   +4 more sources