Results 31 to 40 of about 91,199 (294)

Circumventing the radiation pressure barrier in the formation of massive stars via disk accretion

, 2010
We present radiation hydrodynamics simulations of the collapse of massive pre-stellar cores. We treat frequency dependent radiative feedback from stellar evolution and accretion luminosity at a numerical resolution down to 1.27 AU.
Beltrán, Beuther, Beuther, Beuther, Beuther, Beuther, Beuther, Boley, Cesaroni, Chini, Davis, Duschl, Gammie, Henning, Henrik Beuther, Hosokawa, Hubert Klahr, Kahn, Keto, Klahr, Krumholz, Krumholz, Krumholz, Landau, Larson, Lyder, McKee, Mignone, Ossenkopf, Rolf Kuiper, Schreyer, Shakura, Shu, Thomas Henning, Truelove, Vaidya, Wu, Yorke, Yorke, Zhang, Zhang, Zhang, Zhang   +42 more
core   +1 more source

The Auriga stellar haloes: connecting stellar population properties with accretion and merging history [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
Accepted to MNRAS.
Antonela Monachesi, Facundo A Gómez, Robert J J Grand, Christine M Simpson, Guinevere Kauffmann, Sebastián Bustamante, Federico Marinacci, Rüdiger Pakmor, Volker Springel, Carlos S Frenk, Simon D M White, Patricia B Tissera   +11 more
openaire   +5 more sources

Searching for coherent pulsations in ultraluminous X-ray sources [PDF]

, 2014
Luminosities of ultraluminous X-ray sources (ULXs) are uncomfortably large if compared to the Eddington limit for isotropic accretion onto stellar-mass object.
Doroshenko, V., Ducci, L., Santangelo, A.   +2 more
core   +1 more source

Rapidly Accreting Supergiant Protostars: Embryos of Supermassive Black Holes?

, 2012
Direct collapse of supermassive stars (SMSs) is a possible pathway for generating supermassive black holes in the early universe. It is expected that an SMS could form via very rapid mass accretion with Mdot ~ 0.1 - 1 Msun/yr during the gravitational ...
Alvarez, Baraffe, Bromm, Bromm, Campanelli, Harold W. Yorke, Hartmann, Hayashi, Heger, Herrmann, Hosokawa, Hosokawa, Hosokawa, Jeon, Johnson, Kazuyuki Omukai, Kitayama, Kitayama, Machida, Madau, McKee, Milosavljević, Oh, Ohkubo, Omukai, Omukai, Omukai, Schneider, Shibata, Takashi Hosokawa, Whalen   +30 more
core   +1 more source

Tracing Galaxy Formation with Stellar Halos II: Relating Substructure in Phase- and Abundance-Space to Accretion Histories [PDF]

, 2008
This paper explores the mapping between the observable properties of a stellar halo in phase- and abundance-space and the parent galaxy's accretion history in terms of the characteristic epoch of accretion and mass and orbits of progenitor objects.
Andreea Font, Brant E. Robertson, Fardal M. A., Geehan J. J., Helmi A., James S. Bullock, Kathryn V. Johnston, Knebe A., Renda A., Samuel N. Leitner, Sanjib Sharma   +10 more
core   +2 more sources

Accretion disks in luminous young stellar objects [PDF]

The Astronomy and Astrophysics Review, 2016
71 pages, 19 figures.
BELTRAN SOROLLA, MARIA TERESA, de Wit, W. J.   +1 more
openaire   +3 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Evolution of the Accretion Rate of Young Intermediate-mass Stars: Implications for Disk Evolution and Planet Formation

The Astronomical Journal
This work presents a study of the evolution of the stellar accretion rates of pre-main-sequence intermediate-mass stars. We compare the accretion rate of the younger intermediate-mass T Tauri stars (IMTTSs) with the older Herbig stars into which they ...
Sean D. Brittain, Joshua W. Kern, Gwendolyn Meeus, René D. Oudmaijer   +3 more
doaj   +1 more source

Enhanced accretion rates of stars on Super-massive Black Holes by star-disk interactions in galactic nuclei

, 2012
We investigate the dynamical interaction of a central star cluster surrounding a super-massive black hole and a central accretion disk. The dissipative force acting on stars in the disk leads to an enhanced mass flow towards the super-massive black hole ...
Andreas Just, Baruteau, Begelman, Binney, Bisnovatyi-Kogan, Bisnovatyi-Kogan, Callegari, Callegari, Chingis Omarov, Denis Yurin, Emmanuil Y. Vilkoviskij, Frank, Gillessen, Gültekin, Kasen, Langbein, Li, Maxim Makukov, Miralda-Escudé, Murphy, Novikov, Ostriker, Park, Peter Berczik, Rainer Spurzem, Rauch, Rauch, Shakura, Spitzer, Syer, Vilkoviskij, Vilkoviskij, Vilkoviskij, Šubr   +33 more
core   +1 more source

Mergers of accreting stellar-mass black holes [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We present post-Newtonian $N$-body simulations on mergers of accreting stellar-mass black holes (BHs), where such general relativistic effects as the pericenter shift and gravitational wave (GW) emission are taken into consideration. The attention is concentrated on the effects of the dynamical friction and the Hoyle-Lyttleton mass accretion by ambient
Tagawa, Hiromichi, Umemura, M., Gouda, N.   +2 more
openaire   +3 more sources