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Topic: Stellar dynamics

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	Stellar - Wikipedia, the free encyclopedia
		Stellar aberration is an astronomical phenomenon defined as an apparent motion of the heavenly bodies due to a combination of the motion of the Earth and the finite velocity of light.
		Stellar astronomy is the study of stars and the phenomena exhibited by the various forms/developmental stages of stars.
		Stellar evolution is the sequence of changes that a star undergoes during its lifetime, the millions or billions of years during which it emits light and heat.
	en.wikipedia.org /wiki/Stellar (531 words)

	Stellar dynamics - Wikipedia, the free encyclopedia
		Stellar dynamics is the branch of astrophysics which describes in a statistical way the collective motions of stars subject to their mutual gravity.
		The long range of gravity and the slow "relaxation" of stellar systems prevent the use of the methods of statistical physics.
		The motion of stars in a galaxy or in a globular cluster are principally determined by the average distribution of the other, distant stars, and little influenced by the nearest stars.
	en.wikipedia.org /wiki/Stellar_dynamics (196 words)

	Stellar Structure and Evolution
		One of the triumphs of stellar evolution theory is a detailed understanding of the preferred location of stars in the physical Hertzsprung-Russell diagram, which plots luminosity versus temperature (Figure 17).
		A stellar model is constructed by solving the four basic equations of stellar structure: (1) conservation of mass; (2) conservation of energy; (3) hydrostatic equilibrium and (4) energy transport via radiation, convection and/or conduction.
		Given a stellar structure model, the oscilation frequencies are then predicted, and compared with the measurements, thus testing the underlying physics of the assumed stellar structure.
	www.rssd.esa.int /SA-general/Projects/GAIA_files/LATEX2HTML/node64.html (1076 words)

	Application to stellar dynamics (Site not responding. Last check: 2007-09-10)
		The Boltzmann equation does not in general apply to stellar systems, because gravity is a long range force and a Boltzmann collision integral based on binary collisions is usually not appropriate.
		These unseen components include the mass of all stellar remnants, principally white dwarfs, that have formed in the lifetime of the Galaxy.
		Very often dynamically estimated masses turn out to be larger than the mass estimated from light.
	grus.berkeley.edu /~jrg/ay202/node46.html (780 words)

	Welcome to the Science Complex
		Stellar Cartography/Astrometrics: Stellar Cartography, sometimes called Astrometrics, is responsible for mapping the general area of space from which the ship passes and studies.
		Incorporated into this mapping process is included relevant data on any stellar or spatial body discovered and catalogued by one of the other departments.
		Stellar and Thermodynamics: This department concerns itself primary with the reactions, heat and energy that take place within space, especially within a star.
	www.angelfire.com /trek/southerncross/science.html (998 words)

	gravitational waves and stellar dynamics
		Recent HST observations of the stellar kinematics at the centre of M15 around the MilkyWay and G1 around M31 have been interpreted as indications of the presence of an IMBH in both clusters.
		For instace, the dynamical evolution of an isolated self gravitating system with two stellar mass groups is something we address with this code.
		Clean-cut properties of the cluster dynamics were examined, like core collapse, the evolution of the central potential, as well as escapers.
	www.aei.mpg.de /~pau/recerca_en.html (1652 words)

	International Astronomical Union Symposium 246
		Dense stellar systems are an interface between dynamics, stellar evolution, formation of galaxies and provide us with an ideal laboratory to understand many different aspects of these important fields as well as to explore the interplay between them.
		These studies have convincingly shown that the role played by the host galaxy in the formation and evolution of star clusters is an important additional element along with the effects of stellar dynamics, stellar evolution and their complex interplay.
		The complete study of the formation and evolution of star clusters is a very challenging task which requires the collaboration and the exchange of ideas of astronomers and physicists with observational and theoretical expertise in Galactic and extra-galactic astronomy, stellar dynamics, hydrodynamics and stellar evolution.
	www.physics.drexel.edu /~iaus246 (225 words)

	Stellar cartography - Memory Alpha - A Wikia wiki
		Stellar cartography is the science and practice of making maps and projections of space.
		In 2370, Alsia, an alien patron of Quark's, told Martus Mazur that her father had been a stellar cartographer.
		Alsia's father had conducted a full spectrum mineralogical analysis of the Vlugta asteroid belt in 2350, although he didn't have the resources available to produce a profit from his research.
	www.memory-alpha.org /en/wiki/Stellar_Cartography (461 words)

	Piet Hut: Astrophysics
		My main field of research in astrophysics is stellar dynamics, especially stellar dynamics of dense stellar systems, such as star clusters and galactic nuclei.
		The most interesting application of stellar dynamics of dense stellar systems is a detailed modeling of active galactic nuclei, which provide the fire works that power quasars.
		Whether the particles are stars, planetesimals, or galaxies, the dynamics of these systems is called `collisional' if either the two-body relaxation time or the physical collision time in the system is shorter than the age of the system.
	www.ids.ias.edu /~piet/act/astro (597 words)

	ARI: Stellar dynamics (Site not responding. Last check: 2007-09-10)
		The structure, dynamics and evolution of the Milky Way and other spiral galaxies are analyzed with analytical and semi-analytical methods.
		With numerical simulations the evolution of star clusters, galactic nuclei, Super Massive Black Holes, formation and interaction of galaxies, and planet formation are investigated.
		Dynamical stability and evolution of discs (B. Fuchs, C. Dettbarn)
	www.ari.uni-heidelberg.de /institut/stellardyn (152 words)

	Stellar Astrophysical Fluid Dynamics - Cambridge University Press (Site not responding. Last check: 2007-09-10)
		This volume gives a comprehensive overview of the current state of knowledge in stellar astrophysical fluid dynamics, and marks the 60th birthday of Douglas Gough, Professor of Theoretical Physics at the University of Cambridge and leading contributor to stellar astrophysical fluid dynamics.
		Topics include properties of pulsating stars, helioseismology, convection and mixing in stellar interiors, dynamics of stellar rotation, planet formation and the generation of stellar and planetary magnetic fields.
		Each chapter is written by leading experts in the field, and the book provides an overview that is central to any attempt to understand the properties of stars and their evolution.
	www.cambridge.org /uk/catalogue/catalogue.asp?isbn=0521818095 (350 words)

	Galactic and Stellar Dynamics (Site not responding. Last check: 2007-09-10)
		John Dubinski has investigated the effect of dark halo dynamical friction on precessing, tilted galactic disks and its possible implication in the origin of galactic warps following the predictions of Nelson and Tremaine.
		The increased disruption in nuclei with smaller holes increases the attractiveness of models invoking tidal disruptions as the source of transient X-ray flares and Seyfert-like emission in mildly active nuclei.
		C. Murali and Scott Tremaine have begun investigating the dynamics of Galactic satellite remnants to provide a theoretical basis for interpreting observations of candidate merger and disruption events in the halo of the Milky Way.
	www.cita.utoronto.ca /webpages/CITA/annrep96/node32.html (2273 words)

	Stellar Dynamics around Supermassive Black Holes in Galactic Nuclei (Site not responding. Last check: 2007-09-10)
		A review of stellar dynamical methods will be given to model dense stellar systems with embedded supermassive fl holes, including accretion by tidal disruption of stars.
		The dynamical interaction of binary fl holes with their surrounding stellar system is studied by direct N-bodels.
		Post-Newtonian (PN) dynamics needs to be included to follow the dynamics of the fl hole binary thereafter; we describe our first implementation of a full 2.5 PN model, which allows correct orbit integration and determination of the gravitational radiation emission and its back-reaction.
	qso.lanl.gov /meetings/meet2006/abs_spurzem.html (176 words)

	Dynamics and stellar evolution
		In this scenario, we have started a long term project which aims at using GGCs as a laboratory to study the impact of the (internal) environment and (external) dynamical effects on the evolution of the cluster stellar population.
		The stellar interactions can deeply affect the dynamical status of the cluster, (1) generating a wide variety of peculiar objects with respect to a normal stellar population and/or (2) producing strong signatures on the LF of canonical sequences.
		The study of the evolved stellar population in the cluster (Paltrinieri et al.
	www.bo.astro.it /report00/node9.html (891 words)

	MODEST (Site not responding. Last check: 2007-09-10)
		Often owing their existence to purely dynamical processes, dense stellar systems offer wholly new channels for stars to evolve, allowing the formation of stellar species completely inaccessible by standard stellar and binary evolutionary pathways.
		MODEST is a loosely knit collaboration between various groups working in stellar dynamics, stellar evolution, and stellar hydrodynamics.
		While many of us have talked for years about combining `live' stellar evolution codes directly with N-body simulations, we have now reached a consensus between various groups about standards and interfaces, what is needed, and what is doable.
	www.manybody.org /modest (344 words)

	Astronomy
		No individual course is required, but students normally take the core courses (Stellar Populations, Stellar Astrophysics, Interstellar Matter and Star Formation, Stellar Dynamics, Galaxies, Cosmology), which provide a basic preparation in astronomy, and additional courses related to their research interests.
		The dynamics and evolution of star clusters; structure and dynamics of our galaxy; theories of spiral structure; dynamical evolution of galaxies.
		Dynamics and evolution of the interstellar medium including interactions between stars and interstellar matter.
	www.yale.edu /bulletin/html2003/grad/astr.html (719 words)

	Courses in the Department of Astronomy and Astrophysics
		Interstellar medium, collisionless systems, distribution of stars in the solar neighborhood, stellar kinematics/dynamics, observations of galactic large-scale structure, theory of galactic structure and evolution.
		Astrophysics IV The observed universe, the universe at high redshift, early universe microwave background radiation, relativistic homogeneous isotropic cosmologies, evolution of structure in the universe, primordial nucleosynthesis.
		Fundamentals of radiative transfer, theory of stellar atmospheres, basic theory of radiation fields, continuum emission processes, atomic and molecular emission, plasma effects.
	catalogs.uchicago.edu /divisions/astro-courses.html (378 words)

	Internal Structure and Dynamics of Stellar Aggregates
		This will provide a test for star formation scenarios (see Section 1.3.5), and can be compared with mass determinations through binaries (see Section 1.5.6).
		The internal dynamics of globular clusters is discussed in Section 1.2.7, and that of the dwarf satellites in Section 1.8.2.
		For example, due to equipartition of energy, velocity dispersion depends on stellar mass, massive stars having the smallest and low-mass stars the largest values.
	www.rssd.esa.int /SA-general/Projects/GAIA_files/LATEX2HTML/node32.html (476 words)

	NEMO Stellar Dynamics Toolbox
		On Toolboxes and Telescopes, by Hut and Sussman, (1986) in: The Use of Supercomputers in Stellar Dynamics, Springer Verlag, p 193-198.
		An Environment for Experiments in Stellar Dynamics, by: Barnes, Hernquist, Hut and Teuben (1988) BAAS, 20, 706.
		NEMO: A Stellar Dynamics Toolbox, by Teuben (1994, PASJ, xxx, yyy) overviews the current state of NEMO and introduces a proposal to use FITS as a vehicle to interchange and archive NBODY data (see also the QUESTIONNAIRE).
	bima.astro.umd.edu /nemo (2395 words)

	[No title]
		We expect that ten years from now, it will be routine to carry out star cluster simulations using real stellar evolution codes coupled to a stellar dynamics code.
		The next step will be to perform extensive validation experiments, combining various stellar evolution codes with various stellar dynamics codes, in order to see how reproducible their results are.
		For the output, we envision some budding collaborations leading to the development of relatively simple but robust and autonomous stellar evolution codes, to be used as modules in large-scale simulations of the entire history of dense stellar systems.
	www.astro.uu.nl /~langer/siu_web/ny.txt (685 words)

	[17.02] Stellar Dynamics at the Galactic Center with a Thirty Meter Telescope (Site not responding. Last check: 2007-09-10)
		We discuss physical experiments achievable via the infrared monitoring of stellar dynamics in the neighborhood of the massive fl hole at the Galactic center with the proposed Thirty Meter Telescope (TMT).
		Given the likely observational capabilities of the TMT and present knowledge of the stellar environment at the Galactic Center, we construct plausible samples of stellar orbits around the fl hole.
		Using the Markov Chain Monte Carlo method we evaluate the constraints such orbits place on the matter content within the dynamical sphere of influence of the fl hole.
	www.aas.org /publications/baas/v36n2/aas204/475.htm (307 words)

	Principles of Stellar Dynamics
		A Nobel Prize-winning astrophysicist presents the theory of stellar dynamics as a branch of classical dynamics, clarifying fundamental issues and revealing underlying theoretical motivations.
		Rigorous examination of relationship between loss of energy, mass and radius of stars in a steady state.
		Combines material from gas dynamics, shock-wave theory, thermodynamics and statistical physics, molecular physics, spectroscopy, radiation theory, other fields for comprehensive treatment.
	www.doverdirect.com /048644273x.html (138 words)

	MASSIVE STELLAR CLUSTERS
		They are of interest to various astrophysical research fields, including stellar astrophysics, stellar dynamics and the evolution of galaxies.
		Whoever has been implied in empirical studies of so-called "simple stellar populations" knows that it is not that easy to select clusters appropriate for a particular aspect of stellar evolution.
		Most of these questions can only be answered with combined information on stellar evolution, star populations and dynamics.
	astro.u-strasbg.fr /~lancon/Workshop/index.html (270 words)

	[75.01] Stellar Dynamics of Gravitational Lens Galaxies (Site not responding. Last check: 2007-09-10)
		\noindent The great beauty of galaxy dynamics and strong gravitational lensing stems from both being solely governed by the gravitational potential, the physics of which is well understood in the weak limit.
		The accuracy of galaxy mass models is therefore determined only by a lack of accurate observations, a poor understanding of the dark-matter distribution and degeneracies in the mass phase-space density models.
		\noindent Because the stellar dynamics of gravitational lens galaxies and the properties of the lensed images both depend on the same gravitational potential, their combination results in a powerful tool that potentially can break some of these degeneracies and measure the properties of the baryonic and dark-matter distributions in galaxies out to z~1.
	www.aas.org /publications/baas/v33n4/aas199/506.htm (182 words)

	An Environment for Experiments in Stellar Dynamics (Site not responding. Last check: 2007-09-10)
		Many important problems in Stellar Dynamics are vulnerable to attack by means of experimental physics when simulated on digital computers.
		With a collection of interlinked software we can construct synthetic realizations where a wide range of experimental situations can be realized and their dynamical and hydrodynamical evolution directly computed.
		Topics now under investigation include stellar collisions, few-body scattering cross-sections, evolutions of star clusters, equilibrium galaxy models, and interactions between two or more galaxies.
	bima.astro.umd.edu /nemo/papers/baas88.html (254 words)

	Binney, J. and Tremaine, S.: Galactic Dynamics. (Site not responding. Last check: 2007-09-10)
		Their work in this volume describes our present understanding of the structure and dynamics of stellar systems such as galaxies and star clusters.
		Nicknamed "the Bible of galactic dynamics," this book has become a classic treatise, well known and widely used by researchers and students of galactic astrophysics and stellar dynamics.
		Most of the astronomical community since the late 1980s was introduced to galactic dynamics through Galactic Dynamics, and it remains the most widely used graduate textbook in galactic astrophysics today.
	press.princeton.edu /titles/2537.html (315 words)

	SPZ
		It is a pleasure to invite you to take part in the second MODEST (MOdeling DEnse STellar systems) a workshop on the construction of realistic simulation models for star clusters.
		Our main aim is to bring a number of experts from the fields of stellar evolution, stellar dynamics, and stellar hydrodynamics, in order to discuss and coordinate efforts toward realistic simulations of star clusters.
		Our main goal is to discuss the development of models for star cluster using real stellar evolution codes coupled to a stellar (hydro)dynamics codes.
	astronomy.swin.edu.au /scyon/previous/no10/modest/modest.html (412 words)

	MODEST/MANYBODY (Site not responding. Last check: 2007-09-10)
		These include MODEST (MOdeling DEnse STellar systems), a collaboration between groups working in stellar dynamics, stellar evolution, and stellar hydrodynamics, and the
		MODEST stands for MOdeling DEnse STellar systems, and is a loosely knit collaboration between various groups working in stellar dynamics, stellar evolution, and stellar hydrodynamics.
		Our aim is to provide a software framework for large scale simulations of dense stellar systems, in which existing codes for dynamics, stellar evolution, and hydrodynamics can be easily coupled.
	www.manybody.org (200 words)

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