'Density waves' diaporamas de présentation

Modern Astronomy Stars & Galaxies Lecture 7

Modern Astronomy Stars & Galaxies Lecture 7. The Milky Way Galaxy: Putting it all together Geraint F. Lewis University of Sydney 2007. Outline. Galactic Structure Where are the stars? Rotation and spiral structure Into the middle Formation of the Galaxy Milky Way and friends.

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Changsheng Shi

Corotational Instability of Inertial-Acoustic Modes in Black Hole Accretion Discs and Quasi-Periodic Oscillations. Changsheng Shi. 2008.10.30. Reference: Dong Lai and David Tsang, arxiv 0810.0203v1. Introduction. Setup and basic equations.

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Chapter 23 The Milky Way Galaxy

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Modern Astronomy Stars & Galaxies Lecture 7

Modern Astronomy Stars & Galaxies Lecture 7. The Milky Way Galaxy: Putting it all together Geraint F. Lewis University of Sydney 2005. Outline. Galactic Structure Where are the stars? Rotation and spiral structure Into the middle Formation of the Galaxy Milky Way and friends.

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Galaxies

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The Milky Way Galaxy

The Milky Way Galaxy. The Milky Way. We see a band of faint light running around the entire sky. Galileo discovered it was composed of many stars. With unaided eye you can see light and dark patches. Measuring the Milky Way. William Herschel Star Counting Assumed all stars same brightness

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Granular Jets

Alexander Barnaveli. Georgia. Granular Jets. If a steel ball is dropped onto a bed of dry sand, a "splash" will be observed that may be followed by the ejection of a vertical column of sand. Reproduce and explain this phenomenon . Presentation Plan. Experiments 2. Jet formation mechanisms

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Widescreen Test Pattern (16:9)

Widescreen Test Pattern (16:9). Aspect Ratio Test (Should appear circular). 4x3. 16x9. Spiral Structure in Galaxies. Suprit Singh (Talk for the course: Galactic Dynamics). 12 th March 2010. Overview. Spiral Structure Basics Lin- Shu Hypothesis Geometry The Winding Problem

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Density wave theory The WKB dispersion relation for waves in disks

AST1420. Lecture 18 Spiral pattern theory. Density wave theory The WKB dispersion relation for waves in disks Toomre stability (gravitational stability) of disks 4 possible types of waves in galactic disks Density wave theory of Lin & Shu

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Properties of Waves

Properties of Waves. Chapter 12 Section 3. What Is A Wave?. Ripple waves in water are formed by the vibrations of water molecules. As the vibration waves spread outward to more molecules, the waves travel outward. A wave is considered to be the motion of disturbance.

1.01k views • 20 slides