Results 81 to 90 of about 23,810 (131)

Mergers and Mass Accretion Rates in Galaxy Assembly: The Millennium Simulation Compared to Observations of z~2 Galaxies

, 2008
Recent observations of UV-/optically selected, massive star forming galaxies at z~2 indicate that the baryonic mass assembly and star formation history is dominated by continuous rapid accretion of gas and internal secular evolution, rather than by major
Amiel Sternberg, Bower R. G., Boylan-Kolchin M., Dieter Lutz, Erin K. S. Hicks, Giovanni Cresci, Kristen L. Shapiro, Linda J. Tacconi, Natascha M. Förster Schreiber, Nicolas Bouché, Ocvirk P., Peter Buschkamp, Reinhard Genzel, Richard I. Davies, Shy Genel, Thorsten Naab   +15 more
core   +1 more source

Magnetic Flux Transport in Advection-dominated Accretion Flow toward the Formation of a Magnetically Arrested Disk

The Astrophysical Journal
Magnetically arrested disks (MADs) have attracted much attention in recent years. The formation of MADs is usually attributed to the accumulation of a sufficient amount of dynamically significant poloidal magnetic flux.
Jia-Wen Li, Xinwu Cao
doaj   +1 more source

Gaseous Flows in Galaxies

, 2007
The gas component plays a major role in the dynamics of spiral galaxies, because of its dissipative character, and its ability to exchange angular momentum with stars in the disk.
Block, Bournaud, Bournaud, Buta, Curir, di Matteo, Francoise Combes, Friedli, García-Burillo, Tiret   +9 more
core   +1 more source

Linking the Supermassive Black Hole Growth with the Megamaser Emission

, 2012
High-resolution observations of the central few 100 pc of the galactic nuclear environments remain prohibitive for large statistical samples, which are crucial for tracing the links between central black hole formation, galaxy formation and AGN activity ...
Abazajian, Anca Constantin, Braatz, Braatz, Braatz, Brinchmann, Charlot, Constantin, Constantin, Constantin, Falcke, Ferruit, Greenhill, Greenhill, Heckman, Herrnstein, Kondratko, Kuo, Osterbrock, Reid, Schawinski, Schawinski, Shakura, Zhu   +23 more
core   +1 more source

Insights from Analytical Theory of Eccentric Circumbinary Disks

The Astrophysical Journal
Eccentric cavities in circumbinary disks precess on timescales much longer than the binary orbital period. These long-lived steady states can be understood as trapped modes in an effective potential primarily determined by the binary quadrupole and the ...
Marcela Grcić, Daniel J. D’Orazio, Martin E. Pessah   +2 more
doaj   +1 more source

Strengthening the Case for Asteroidal Accrection: Evidence for Subtle and Diverse Disks at White Dwarfs

, 2010
Spitzer Space Telescope IRAC 3-8 micron and AKARI IRC 2-4 micron photometry are reported for ten white dwarfs with photospheric heavy elements; nine relatively cool stars with photospheric calcium, and one hotter star with a peculiar high carbon ...
Abazajian, B. Zuckerman, Brinkworth, Copenhagen University Observatory, DENIS Consortium, Farihi, Farihi, Fazio, Gänsicke, Hagen, J. Farihi, J.-E. Lee, Jura, Jura, Jura, Jura, Jura, Jura, Kilic, Kilic, Klein, Koester, Landolt, Lisse, M. Jura, Martin, McCook, McCook, Melis, Monet, Murakami, Onaka, Petitclerc, Skrutskie, Space Telescope Science Institute, Spitzer Science Center., Weiss, Werner, Wisotzki, Zacharias, Zuckerman, Zuckerman   +41 more
core   +1 more source

Shock Waves in the Magnetic Reconnection in the Flares on the Accretion Disk of the Sgr A*

The Astrophysical Journal
Sgr A* often shows bright, episodic flares observationally, but the mechanism of the flares' intermittent brightening is not very clear. Many people believe the flares may be formed by the nonthermal particles, which can be a consequence of the magnetic ...
Tian-Le Zhao, Xiao-Feng Li, Ze-Yuan Tang, Rajiv Kumar   +3 more
doaj   +1 more source

Observational constraints on the co-evolution of supermassive black holes and galaxies

, 2009
The star formation rate (SFR) and black hole accretion rate (BHAR) functions are measured to be proportional to each other at z < ~3. This close correspondence between SF and BHA would naturally yield a BH mass-galaxy mass correlation, whereas a BH mass ...
Alonso-Herrero, Barger, Barth, Bell, Bell, Bell, Bell, Bell, Bell, Binney, Borys, Brand, Brown, Bundy, Chartas, Chary, Cox, D. Schiminovich, Dale, Dickinson, Donley, Donley, Drory, E. F. Bell, F. Fontanot, Ferrarese, Fontana, G. H. Rieke, Gabor, Gebhardt, Granato, Greene, Grogin, H.-W. Rix, Haiman, Ho, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Häring, Häußler, Jogee, K. Jahnke, K. Meisenheimer, Kaspi, Kollmeier, Kormendy, La Franka, Lagache, Lauer, Lauer, Le Floc'h, Lehmer, Magorrian, Marconi, Martin, McIntosh, McNamara, Miyaji, Morrissey, Murray, Nandra, Noeske, Pannella, Papovich, Peng, Peng, Pierce, Pérez-González, R. S. Somerville, Rafferty, Reddy, Richards, Richards, Rieke, Rieke, Rix, Robaina, Robertson, Robertson, Rudnick, Sanders, Schiminovich, Schiminovich, Shi, Shields, Silk, Silverman, Smolčić, Thomas, Trager, Tremonti, Treu, Treu, Ueda, van der Wel, Vestergaard, Wandel, Watson, Wolf, Woo, Wyithe, X. Z. Zheng, Zheng, Zheng   +106 more
core   +1 more source

Disk Assembly of the Milky Way Suggested from the Time-resolved Chemical Abundance

The Astrophysical Journal
Both simulations and observations suggest that the disk assembly of galaxies is governed by the interplay between coplanar gas inflow, ex-planar gas outflow, and in situ star formation on the disk, known as the leaky accretion disk.
Enci Wang, Jianhui Lian, Yingjie Peng, Xin Wang   +3 more
doaj   +1 more source

Gas accretion in galactic disks [PDF]

, 2004
Evidence for the accretion of material in spiral galaxies has grown over the past years and clear signatures can be found in HI observations of galaxies.
Sancisi, Renzo, van der Hulst, Thijs
core   +2 more sources