The Milky Way powepoint
... curves” following the “expected” path in the diagram at right. What is observed instead is that rotation curves tend to remain high as far out as they can be measured. This means the existence of massive halos of dark matter in galaxies. The nature of the material comprising this dark matter is comp ...
... curves” following the “expected” path in the diagram at right. What is observed instead is that rotation curves tend to remain high as far out as they can be measured. This means the existence of massive halos of dark matter in galaxies. The nature of the material comprising this dark matter is comp ...
proposed research projects for pparc gemini studentships
... formation of S0 galaxies, and their dependency on galaxy mass. To this end, we propose a spectral study of a large sample of lenticular systems to establish the links between the properties of their stellar populations (ages and chemical abundances) and their kinematic properties (masses and dynamic ...
... formation of S0 galaxies, and their dependency on galaxy mass. To this end, we propose a spectral study of a large sample of lenticular systems to establish the links between the properties of their stellar populations (ages and chemical abundances) and their kinematic properties (masses and dynamic ...
21st Century Experiments in Cosmology
... • Signal digitized – combined in computers to emulate large collecting area • Large collecting area and high resolution at . 200 MHz ) Good to probe the high redshift Universe (z>6) through the 21cm line ...
... • Signal digitized – combined in computers to emulate large collecting area • Large collecting area and high resolution at . 200 MHz ) Good to probe the high redshift Universe (z>6) through the 21cm line ...
PowerPoint - Physics and Astronomy
... Based on galactic rotation curves and motions in clusters of galaxies, dark matter a) b) c) d) e) ...
... Based on galactic rotation curves and motions in clusters of galaxies, dark matter a) b) c) d) e) ...
Gravitationally Lensed Galaxy
... One of the most striking examples of a gravitational lens is the nearly 90-degree arc of light in the galaxy cluster RCS2 032727-132623, located in the constellation Eridanus. Magnified and distorted light from a distant galaxy creates this arc. It is the brightest gravitationally lensed object yet ...
... One of the most striking examples of a gravitational lens is the nearly 90-degree arc of light in the galaxy cluster RCS2 032727-132623, located in the constellation Eridanus. Magnified and distorted light from a distant galaxy creates this arc. It is the brightest gravitationally lensed object yet ...
Review4
... A galaxy is moving away from us at a speed of 30,000 km/s . How far is the galaxy away from us? Hint: Use Hubble’s law: V=H d and take the value of H from the book and the above value for V and solve for d. Make sure that you find d in the correct units. For this you may need to convert the units of ...
... A galaxy is moving away from us at a speed of 30,000 km/s . How far is the galaxy away from us? Hint: Use Hubble’s law: V=H d and take the value of H from the book and the above value for V and solve for d. Make sure that you find d in the correct units. For this you may need to convert the units of ...
Weak gravitational lensing
While the presence of any mass bends the path of light passing near it, this effect rarely produces the giant arcs and multiple images associated with strong gravitational lensing. Most lines of sight in the universe are thoroughly in the weak lensing regime, in which the deflection is impossible to detect in a single background source. However, even in these cases, the presence of the foreground mass can be detected, by way of a systematic alignment of background sources around the lensing mass. Weak gravitational lensing is thus an intrinsically statistical measurement, but it provides a way to measure the masses of astronomical objects without requiring assumptions about their composition or dynamical state.