Results 51 to 60 of about 387,146 (299)

Growth of asteroids, planetary embryos, and Kuiper belt objects by chondrule accretion [PDF]

Science Advances, 2015
Chondrules, tiny spheres found in primitive meteorites, accumulate through gas drag to form asteroids and planetary embryos. Chondrules are millimeter-sized spherules that dominate primitive meteorites (chondrites) originating from the asteroid belt. The
A. Johansen, M. Low, P. Lacerda, M. Bizzarro   +3 more
semanticscholar   +1 more source

Accretion onto Pre-Main-Sequence Stars

, 2016
Accretion through circumstellar disks plays an important role in star formation and in establishing the properties of the regions in which planets form and migrate. The mechanisms by which protostellar and protoplanetary disks accrete onto low-mass stars
L. Hartmann, G. Herczeg, N. Calvet
semanticscholar   +1 more source

Tectonic-geodynamical zoning of the Ural-Timan-Paleoasian segment of Eurasia

Литосфера, 2015
Methodology of geological zoning of orogenic belts, adequate to mobilistic paradigma, should be in a natural way correspond to geodynamics conception, taking into consideration the positions of lithospheric plate tectonics.
V. M. Necheukhin, E. N. Volchek
doaj   +2 more sources

Evolution of Massive Protostars via Disk Accretion

, 2010
Mass accretion onto (proto-)stars at high accretion rates > 10^-4 M_sun/yr is expected in massive star formation. We study the evolution of massive protostars at such high rates by numerically solving the stellar structure equations.
Bodenheimer, Bontemps, Cesaroni, Cox, Furuya, Harold W. Yorke, Hartmann, Hosokawa, Hosokawa, Hosokawa, Kazuyuki Omukai, Kippenhahn, Krumholz, Larson, McKee, Neo, Norberg, Omukai, Omukai, Schaller, Sridharan, Takashi Hosokawa, Tan, Walmsley, Wang, Yorke, Yorke, Zhang   +27 more
core   +1 more source

Disk-mediated accretion burst in a high-mass young stellar object [PDF]

Nature Physics, 2016
Observations show that, like light solar-mass stars, heavy stars also form through episodic disk-accretion; but faster, more energetic and emitting more light. Solar-mass stars form via disk-mediated accretion.
A. C. O. Garatti, B. Stecklum, R. G. Lopez, J. Eisloffel, T. Ray, A. Sanna, R. Cesaroni, C. Walmsley, R. Oudmaijer, W. D. Wit, L. Moscadelli, J. Greiner, A. Krabbe, C. Fischer, R. Klein, J. P. F. I. F. A. Studies, Thuringer Landessternwarte Tautenburg, M. F. Radioastronomie, I. Arcetri, U. Leeds, Eso European Organisation for Astronomical Research in Hemisphere, Max-Planck-Institut fur extraterrestrische Physik, Deutsches Sofia Institut, N. R. Center, Inst. de Astrof'isica de Andaluc'ia   +24 more
semanticscholar   +1 more source

The Radiative Efficiency of Hot Accretion Flows [PDF]

, 2012
Two significant progresses have been made in the past years on our understanding of hot accretion flows. One is that only a small fraction of accretion flow available at the outer boundary can finally falls onto the black hole while most of them is lost in outflow.
arxiv   +1 more source

Galactic star formation and accretion histories from matching galaxies to dark matter haloes [PDF]

, 2012
We present a new statistical method to determine the relationship between the stellar masses of galaxies and the masses of their host dark matter haloes over the entire cosmic history from z 4 to the present.
B. Moster, T. Naab, S. White
semanticscholar   +1 more source

Multi-wavelength diagnostics of accretion in an X-ray selected sample of CTTSs

, 2009
High resolution X-ray spectroscopy has revealed soft X-rays from high density plasma in Classical T-Tauri stars (CTTSs), probably arising from the accretion shock region.
A. Maggio, Akeson, Alencar, Argiroffi, Argiroffi, Batalha, Bertout, Brickhouse, C. Argiroffi, Calvet, Carpenter, Cortes, Costa, Dahm, Donati, Donati, F. Reale, Feigelson, Feigelson, G. G. Sacco, G. Peres, Geoffray, Grankin, Gullbring, Gullbring, Güdel, Güdel, Günther, Günther, Herczeg, Herczeg, Huenemoerder, Hughes, Hutchinson, Jayawardhana, Johns-Krull, Johnson, Kastner, Kastner, Kastner, Kenyon, Koldoba, Lamzin, Lasker, Lombardi, Mamajek, Mekkaden, Mitchell, Mohanty, Mohanty, Muzerolle, Muzerolle, Natta, Natta, Orlando, Pickles, Qi, R. L. Curran, Raassen, Robrade, Robrade, Romanova, Rucinsky, S. Orlando, Sacco, Sacco, Schmitt, Scholz, Silverstone, Solf, Song, Stelzer, Stempels, Stempels, Stempels, Telleschi, Torres, Wichmann, Wilking   +78 more
core   +1 more source

Gamma-ray bursts from stellar mass accretion disks around black holes

, 1993
A cosmological model for gamma-ray bursts is explored in which the radiation is produced as a broadly beamed pair fireball along the rotation axis of an accreting black hole.
S. Woosley
semanticscholar   +1 more source

The black hole accretion code [PDF]

, 2016
We present the black hole accretion code (BHAC), a new multidimensional general-relativistic magnetohydrodynamics module for the MPI-AMRVAC framework.
O. Porth, H. Olivares, Y. Mizuno, Z. Younsi, L. Rezzolla, M. Mościbrodzka, H. Falcke, M. Kramer   +7 more
semanticscholar   +1 more source