Results 41 to 50 of about 744 (92)

Growth of Accreting Supermassive Black Hole Seeds and Neutrino Radiation

Journal of Astrophysics, Volume 2015, Issue 1, 2015., 2015
In the framework of microscopic theory of black hole (MTBH), which explores the most important processes of rearrangement of vacuum state and spontaneous breaking of gravitation gauge symmetry at huge energies, we have undertaken a large series of numerical simulations with the goal to trace an evolution of the mass assembly history of 377 plausible ...
Gagik Ter-Kazarian, Gary Wegner
wiley   +1 more source

A Brief Observational History of the Black‐Hole Spacetimes

Advances in Mathematical Physics, Volume 2015, Issue 1, 2015., 2015
In this year (2015), black holes (BHs) celebrate their 100th birthday, if their birth is taken to be triggered by a handwritten letter from Martin Schwarzschild to Albert Einstein, in connection with his newly found spherically symmetric vacuum solution.
Wolfgang Kundt, Seyed H. Hendi
wiley   +1 more source

Formation of stars and clusters over cosmological time

, 2014
The concept that stars form in the modern era began some 60 years ago with the key observation of expanding OB associations. Now we see that these associations are an intermediate scale in a cascade of hierarchical structures that begins on the ambient ...
Elmegreen, Bruce G.
core   +1 more source

Multidimensional Borg-Levinson Theorem [PDF]

, 2004
We consider the inverse problem of the reconstruction of a Schr\"odinger operator on a unknown Riemannian manifold or a domain of Euclidean space. The data used is a part of the boundary $\Gamma$ and the eigenvalues corresponding to a set of impedances ...
Aktosun T Weder R, Belishev M, Belishev M I, Belishev M I, Birman M S, Borg G, Borg G, Gasymov M G, Gasymov M G, Gelfand I, Hörmander L, Hörmander L, Iwaniec T Martin G, Katchalov A, Katchalov A, Katchalov A Kurylev Y Lassas M, Kato T, Kurylev Y, Levinson N, Levitan B M, Marchenko V A, Matti Lassas, Novikov R, Ricardo Weder, Sylvester J, Uhlenbeck K, Yaroslav Kurylev   +26 more
core   +1 more source

Screening and identification of small molecule inhibitors of ErbB2‐induced invasion

Molecular Oncology, Volume 8, Issue 8, Page 1703-1718, December 2014., 2014
ERBB2 amplification and overexpression are strongly associated with invasive cancer with high recurrence and poor prognosis. Enhanced ErbB2 signaling induces cysteine cathepsin B and L expression leading to their higher proteolytic activity (zFRase activity), which is crucial for the invasion of ErbB2‐positive breast cancer cells in vitro.
D.M. Brix, B. Rafn, K. Bundgaard Clemmensen, S.H. Andersen, N. Ambartsumian, M. Jäättelä, T. Kallunki   +6 more
wiley   +1 more source

Lifetimes of tidally limited star clusters with different radii

, 2008
We study the escape rate, dN/dt, from clusters with different radii in a tidal field using analytical predictions and direct N-body simulations. We find that dN/dt depends on the ratio R=r_h/r_j, where r_h is the half-mass radius and r_j the radius of ...
Aarseth, Ambartsumian, Baumgardt, Baumgardt, Baumgardt, Boutloukos, Chernoff, Fall, Fukushige, Gieles, Gieles, Giersz, Giersz, Giersz, Gnedin, Goodman, H. Baumgardt, Heggie, Hénon, King, King, Lamers, Lamers, Larsen, M. Gieles, Makino, McLaughlin, McMillan, Portegies Zwart, Scheepmaker, Spitzer, Spitzer, Spitzer, Spitzer, Takahashi, Tanikawa, Vesperini, Wielen, Wielen, Zepf   +39 more
core   +1 more source

Invariant Imbedding and the Radiation Transfer in a Plane‐Parallel Inhomogeneous Atmosphere

Journal of Astrophysics, Volume 2014, Issue 1, 2014., 2014
The invariant imbedding technique is applied to the problems of radiation transfer in a plane‐parallel inhomogeneous atmosphere. All the parameters which describe the elementary event of scattering and the distribution of the energy sources are allowed to vary with depth.
Arthur G. Nikoghossian, Milan S. Dimitrijevic, Michael Kueppers, Sven Wedemeyer-Bohm   +3 more
wiley   +1 more source

A Dynamical Potential-Density Pair for Star Clusters With Nearly Isothermal Interiors

, 2015
We present a potential-density pair designed to model nearly isothermal star clusters (and similar self-gravitating systems) with a central core and an outer turnover radius, beyond which density falls off as $r^{-4}$.
Ostriker, Jeremiah P., Stone, Nicholas C.   +1 more
core   +1 more source

Of the new opportunity of solving the Ambartsumian’s functional equation in the theory of radiative transfer

Communications of the Byurakan Astrophysical Observatory, 2023
A new approach to solving of the Ambartsumian’s functional equation is presented. Its application is illustrated on the two classical cases: a) in the case of a plane-parallel semi-infinite medium with monochromatic anisotropic scattering and b) the simple one-dimensional problem of diffuse reflection of radiation from the scattering-absorbing semi ...
openaire   +1 more source

Bi‐Directional Spectro‐Polarimetry of Olivine Sand

Earth and Space Science, Volume 12, Issue 1, January 2025.
Abstract We characterized the bi‐directional spectro‐polarimetry of olivine sands of varying grain size distributions for a comprehensive set of measurement and illumination angles over a wavelength range of 350–2,500 nm. Our laboratory instrumentation included a hyperspectral goniometer, a broadband linear polarizer, and a tungsten‐halogen ...
Chris H. Lee, Charles M. Bachmann, Nayma Binte Nur, Rachel M. Golding   +3 more
wiley   +1 more source