Download presentation

Presentation is loading. Please wait.

1
Particle Astrophysics & Cosmology SS 20081 Chapter 7 Dark Matter

2
Particle Astrophysics & Cosmology SS 20082 Galaxies: face-on view a galaxy like our Milky Way: 10 11 stars, ~ 50 kpc diameter NGC1232

3
Particle Astrophysics & Cosmology SS 20083 Galaxies: edge-on view central stellar bulge, stellar disk, interstellar medium (gas and dust) NGC4565

4
Particle Astrophysics & Cosmology SS 20084 Galaxy groups a few up to ~ 100 galaxies

5
Particle Astrophysics & Cosmology SS 20085 Galaxy clusters up to a few 1000 galaxies a few Mpc total size

6
Particle Astrophysics & Cosmology SS 20086 Density fluctuations without DM

7
Particle Astrophysics & Cosmology SS 20087 Rotation curves of galaxies rotating gaseous disk (HI) rotation velocity v(r) from Doppler shift

8
Particle Astrophysics & Cosmology SS 20088 Galaxy kinematics Isovelocity contours v(x,y) movie

9
Particle Astrophysics & Cosmology SS 20089 Galaxy kinematics a real galaxy (NGC2541)column density of neutral hydrogen optical image(grey/white) and isovelocity contours

10
Particle Astrophysics & Cosmology SS 200810 A movie of v(x,y) model galaxy real galaxy (NGC2541)

11
Particle Astrophysics & Cosmology SS 200811 Measured rotation curve radial distribution of stellar light rotation curve with stellar and gaseous contribution

12
Particle Astrophysics & Cosmology SS 200812 NFW profile vs. observation An extreme case: dwarf galaxy DDO 47 with mass M 10 10 M NFW overpredicts central velocities “cusp problem” NFW Burkert + obs. points dark gas stars

13
Particle Astrophysics & Cosmology SS 200813 X-ray halos of galaxy clusters Cluster A3528 black ellipses: optically visible galaxies colour: X-ray emission

14
Particle Astrophysics & Cosmology SS 200814 Total mass in galaxy clusters distribution of mass in a galaxy clusters

15
Particle Astrophysics & Cosmology SS 200815 Total mass in galaxy clusters rotation curve of a dwarf galaxy

16
Particle Astrophysics & Cosmology SS 200816 Gravitational lensing by galaxy clusters

17
Particle Astrophysics & Cosmology SS 200817 Gravitational lensing by galaxy clusters

18
Particle Astrophysics & Cosmology SS 200818 Numerical CDM simulations Simulated large-scale structure for different cosmologies

19
Particle Astrophysics & Cosmology SS 200819 Numerical CDM simulations cluster large galaxy

20
Particle Astrophysics & Cosmology SS 200820 Observations

21
Particle Astrophysics & Cosmology SS 200821 Simulations and observations simulations and observations agree on large scales

22
Particle Astrophysics & Cosmology SS 200822 Tully-Fisher relation

23
Particle Astrophysics & Cosmology SS 200823 ‘Missing satellites’ galaxy cluster Virgo Cluster: agreement Milky Way: large discrepancy

24
Particle Astrophysics & Cosmology SS 200824 Web sites for numerical simulations http://www.mpa-garching.mpg.de/~volker/gadget/index.html http://www.aip.de/People/MSteinmetz/Movies.html

25
Particle Astrophysics & Cosmology SS 200825 WIMP search

Similar presentations

© 2020 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google