Results 61 to 70 of about 744 (92)

Origin of Blazar Activity

, 1999
Models of Blazars based on the propagation of finite discontinuities or fronts in the Poynting flux jet from the innermost regions of an accretion disk around a black hole are discussed. Such fronts may be responsible for short time-scale (from less than
Romanova, M. M.
core   +1 more source

Exploring a Stream of Highly-Eccentric Binaries with Kepler

, 2012
With 16-month Kepler data, 14 long-period (40 d - 265 d) eclipsing binaries on highly eccentric orbits (minimum e between 0.5 and 0.85) are recognized from their closely separated primary and secondary eclipses (\Delta t_I,II = 3 d - 10 d). These systems
Ambartsumian, Batalha, Borucki, Devor, Duquennoy, Fabrycky, Ford, Hut, Jenkins, Lithwick, Loeb, Mazeh, Raghavan, Slawson, Socrates, Thompson, Welsh   +16 more
core   +1 more source

Series Solution of System of Fractional Order Ambartsumian Equations: Application in Astronomy

, 2020
5 ...
openaire   +2 more sources

Escape from the vicinity of fractal basin boundaries of a star cluster

, 2007
The dissolution process of star clusters is rather intricate for theory. We investigate it in the context of chaotic dynamics. We use the simple Plummer model for the gravitational field of a star cluster and treat the tidal field of the Galaxy within ...
A. Ernst, A. Just, Aguirre, Aguirre, Aguirre, Ambartsumian, Baumgardt, Benet, Benet, Binney, Bleher, Bleher, Cantor, Chandrasekhar, Churchill, Clementi, Contopoulos, Contopoulos, Contopoulos, De Moura, Eckhardt, Eckhardt, Ernst, Feast, Finkler, Fukushige, Gustavson, Holmberg, Hunt, Hénon, Hénon, Hénon, Innanen, Jung, Jung, Jung, Jung, King, King, King, Lai, Lai, Laplace, Moser, Motter, Navarro, O. Porth, Oort, Ott, Plummer, R. Spurzem, Rod, Schneider, Siegel, Siopis, Sommerer, Sommerer, Spitzer, Spitzer, Spurzem, Szebehely, Tscharnuter, Wielen, Wielen   +63 more
core   +1 more source

Dynamical evolution of stellar clusters

, 2011
The evolution of star clusters is determined by several internal and external processes. Here we focus on two dominant internal effects, namely energy exchange between stars through close encounters (two-body relaxation) and mass-loss of the member stars
Gieles, Mark
core  

Verification of Photometric Parallaxes with Gaia DR2 Data

, 2018
Results of comparison of Gaia DR2 parallaxes with data derived from a combined analysis of 2MASS (Two Micron All-Sky Survey), SDSS (Sloan Digital Sky Survey), GALEX (Galaxy Evolution Explorer), and UKIDSS (UKIRT Infrared Deep Sky Survey) surveys in four ...
Chulkov, Dmitry, Dluzhnevskaya, Olga, Karpov, Sergey, Kniazev, Alexey, Kovaleva, Dana, Malkov, Oleg, Mickaelian, Areg, Mironov, Alexey, Murthy, Jayant, Sichevsky, Sergey, Sytov, Alexey, Zhao, Gang, Zhukov, Aleksandr   +12 more
core   +1 more source

Some Recent Developments in the Theory and Computation of Linear Control Problems [PDF]

, 1975
Recent analysis and computational results for the solution of linear dynamics-quadratic cost control processes are presented. It is shown that, if the number of system inputs and outputs is less than the number of state variables, a substantial reduction
Casti, J.L.
core  

The high-mass disk candidates NGC7538IRS1 and NGC7538S

, 2012
Context: The nature of embedded accretion disks around forming high-mass stars is one of the missing puzzle pieces for a general understanding of the formation of the most massive and luminous stars. Methods: Using the Plateau de Bure Interferometer at 1.
Ambartsumian, Argon, Bally, Beltrán, Beltrán, Beuther, Beuther, Beuther, Beuther, Beuther, Beuther, Beuther, Bonnell, Bontemps, Campbell, Campbell, Cesaroni, Cesaroni, Chini, Davis, De Buizer, Draine, Fallscheer, Fallscheer, Forster, H. Beuther, H. Linz, Henning, Hildebrand, Hoffman, Hofner, Hosokawa, Hutawarakorn, Kahn, Kameya, Keto, Keto, Keto, Keto, Keto, Keto, Klaassen, Klaassen, Kratter, Kraus, Kraus, Kroupa, Krumholz, Krumholz, Kuiper, Kuiper, Kuiper, Kumar, Linz, López-Sepulcre, McKee, McKee, Megeath, Minier, Moscadelli, Ossenkopf, Pestalozzi, Pestalozzi, Pestalozzi, Peters, Pratap, Puga, Qiu, Reid, Rodón, Sandell, Sandell, Sandell, Sandell, Schreyer, Shepherd, Sollins, Surcis, Th. Henning, Thronson, van der Tak, Wang, Werner, Willner, Wolfire, Wright, Wu, Yorke, Zhang, Zhang, Zhang, Zheng   +91 more
core   +1 more source

A novel analytical treatment for the Ambartsumian delay differential equation with a variable coefficient

AIMS Mathematics
<p>The Ambartsumian delay differential equation with a variable coefficient is considered in this paper. An effective transformation is produced to convert the extended Ambartsumian equation to the pantograph model. Two kinds of analytical solutions are determined.
Rana M. S. Alyoubi, Abdelhalim Ebaid, Essam R. El-Zahar, Mona D. Aljoufi   +3 more
openaire   +2 more sources

New Analytic Solution for Ambartsumian Equation

Journal of Mathematics and System Science, 2018
null Fahad M. Alharbi, null Abdelhalim Ebaid   +1 more
openaire   +1 more source