The Spatially-Resolved Scaling Law of Star Formation
... gravitation with the following statements: – Every mass attracts every other mass through the force of gravity. – If mass #1 exerts force on mass #2, and mass#2 exerts force on mass#1, the force must depend o both ...
... gravitation with the following statements: – Every mass attracts every other mass through the force of gravity. – If mass #1 exerts force on mass #2, and mass#2 exerts force on mass#1, the force must depend o both ...
Announcements
... Motions of Galaxies in Clusters • Galaxies are moving too fast in clusters of galaxies to be held together by the gravity of the visible stellar material Total Mass ~ 10x visible mass ...
... Motions of Galaxies in Clusters • Galaxies are moving too fast in clusters of galaxies to be held together by the gravity of the visible stellar material Total Mass ~ 10x visible mass ...
Galactic Rotation and Dark Matter Powerpoint
... Indirect detection experiments search for the products of WIMP annihilation. If WIMPs are Majorana particles (the particle and antiparticle are the same) then two WIMPs colliding could annihilate to produce gamma rays or particle-antiparticle pairs. This could produce a significant number of gamma r ...
... Indirect detection experiments search for the products of WIMP annihilation. If WIMPs are Majorana particles (the particle and antiparticle are the same) then two WIMPs colliding could annihilate to produce gamma rays or particle-antiparticle pairs. This could produce a significant number of gamma r ...
Gravitational Lensing: An Unique Probe of Dark Matter and Dark...
... from conventional optics in that there is no single focal point but rather lines of (theoretically) infinite magnification called critical lines. Transferred to the source plane these line become caustics. The location of these lines depends on the relative distances of the source and lens and, of c ...
... from conventional optics in that there is no single focal point but rather lines of (theoretically) infinite magnification called critical lines. Transferred to the source plane these line become caustics. The location of these lines depends on the relative distances of the source and lens and, of c ...
Tsinghua Center for Astrophysics and the Dark - CPPM
... (15000 deg2) to simultaneously measure its two principal dark energy probes: – Weak lensing: ...
... (15000 deg2) to simultaneously measure its two principal dark energy probes: – Weak lensing: ...
Week 2 (9/27) – Opinion Poll I am taking this class because:
... B. The expansion of the Universe is accelerating because of the “anti-gravity”-like effect of an entity known as Dark Matter C. Most of the matter in the Universe is non-luminous and is referred to as Dark Matter D. The nearest star to the Sun is about 4 light years away E. For many stars in our gal ...
... B. The expansion of the Universe is accelerating because of the “anti-gravity”-like effect of an entity known as Dark Matter C. Most of the matter in the Universe is non-luminous and is referred to as Dark Matter D. The nearest star to the Sun is about 4 light years away E. For many stars in our gal ...
dark - The Institute of Mathematical Sciences
... Most galaxies are spiral shaped. By studying the red-shift of light from a distant galaxy, we can determine how rapidly different parts of the galaxy are moving toward or away from us. This lets us construct what's called a "rotation curve". This plot tells us the orbiting speeds of different parts ...
... Most galaxies are spiral shaped. By studying the red-shift of light from a distant galaxy, we can determine how rapidly different parts of the galaxy are moving toward or away from us. This lets us construct what's called a "rotation curve". This plot tells us the orbiting speeds of different parts ...
R. Bender (ESO)
... • Adaptive optics and laser beacons will increase the spatial resolution by a factor of ~3 over HST over tens of arcseconds (NACO, SINFONI: 2003, 2005) Detailed structural and kinematical studies of merging and star-forming galaxies up to high redshift. Analysis of physical conditions in Active G ...
... • Adaptive optics and laser beacons will increase the spatial resolution by a factor of ~3 over HST over tens of arcseconds (NACO, SINFONI: 2003, 2005) Detailed structural and kinematical studies of merging and star-forming galaxies up to high redshift. Analysis of physical conditions in Active G ...
MIDTERM #2 THURSDAY APRIL 16, 2015 AST142 1. Black hole
... The Coma cluster is a nearby cluster of over 1000 galaxies. Zwicky measured the radius of the Coma cluster to be about a Mpc and a radial velocity dispersion of about vr2 ∼ 5 × 105 (km/s)2 . a. Estimate the total mass in the cluster using the virial theorem. b. Suppose the mean mass of each galaxy i ...
... The Coma cluster is a nearby cluster of over 1000 galaxies. Zwicky measured the radius of the Coma cluster to be about a Mpc and a radial velocity dispersion of about vr2 ∼ 5 × 105 (km/s)2 . a. Estimate the total mass in the cluster using the virial theorem. b. Suppose the mean mass of each galaxy i ...
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.