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EPJ Web of Conferences, 2012 Invited review at "Assembling the Puzzle of the Milky Way", Grand Bornand, April 2011; 6 ...
Binney, J, Fraternali, F
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Accrete, Accrete, Accrete… Bang! (and repeat): The remarkable Recurrent Novae [PDF]
Proceedings of The Golden Age of Cataclysmic Variables and Related Objects V — PoS(GOLDEN2019), 2021 All novae recur, but only a handful have been observed in eruption more than once. These systems, the recurrent novae (RNe), are among the most extreme examples of novae. RNe have long been thought of as potential type Ia supernova progenitors, and their claim to this 'accolade' has recently been strengthened. In this short review RNe will be presented
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Accretion Rates and the Accretion Efficiency in AGNs [PDF]
Publications of the Astronomical Society of Japan, 2003 Abstract We used the standard geometrical-thin accretion theory to obtain the accretion rates in Seyfert 1 galaxies and quasars. Combining the accretion rates with the bolometric luminosity, we obtained the accretion efficiency. We found that most Seyfert 1 galaxies and radio-quiet quasars have lower accretion efficiencies, while most ...
Yong-Heng Zhao +2 more
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The Astrophysical Journal, 2006 We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semi-collisional accretion which bridges the gap between these limiting cases.
Sari, Re'em, Goldreich, Peter
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Formation of an Accretion Flow [PDF]
Space Science Reviews, 2021 After a star has been tidally disrupted by a black hole, the debris forms an elongated stream. We start by studying the evolution of this gas before its bound part returns to the original stellar pericenter. While the axial motion is entirely ballistic, the transverse directions of the stream are usually thinner due to the confining effects of self ...
C. Bonnerot, N. C. Stone
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Stochastic accretion of the Earth
Nature Astronomy, 2022 The Earth is depleted in volatile elements relative to chondritic meteorites, its possible building blocks. Abundances of volatile elements descend roughly log-linearly with their calculated volatilities during solar nebula condensation [1, 2]. This depletion, however, is not accompanied by any stable isotope fractionation, which would otherwise be ...
Paolo Sossi +4 more
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2023 In this paper, we formulate a geometric nonlinear theory of the mechanics of accreting–ablating bodies. This is a generalization of the theory of accretion mechanics of Sozio & Yavari (Sozio & Yavari 2019 J. Nonlinear Sci. 29 , 1813–1863 (doi:10.1007/s00332-019-09531-w)).
Satya Prakash Pradhan, Arash Yavari
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Hoyle-Lyttleton Accretion onto Accretion Disks [PDF]
Publications of the Astronomical Society of Japan, 1999 We investigate Hoyle-Lyttleton accretion for the case where the central source is a luminous accretion disk. In Hoyle-Lyttleton accretion onto a “spherical” source, accretion takes place in an axially symmetric manner around a so-called accretion axis and the accretion rate Ṁ is given as ṀHL(1 − Γ)2, where ṀHL is the accretion rate of the classical ...
FUKUE, Jun, IOROI, Masayuki
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The Astrophysical Journal, 2022 Abstract In the two-phase scenario of galaxy formation, a galaxy’s stellar mass growth is first dominated by in-situ star formation, and subsequently by accretion. We analyze the radial distribution of the accreted stellar mass in ∼500 galaxies from the (48 Mpc/h)3 box volume of the hydrodynamical cosmological simulation Magneticum, in a
Rhea-Silvia Remus, Duncan A. Forbes
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On the Accretivity of the Inverse of an Accretive Relation [PDF]
Proceedings of the American Mathematical Society, 1977 If X is a smooth, reflexive, real Banach space such that a relation A in X × X X \times X is accretive iff A − 1 {A^{ - 1}} is accretive, then X is isomorphic to a Hilbert space.
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