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Chapter 8 Structure Formation

Chapter 8 Structure Formation. Galaxy distribution. Galaxy distribution. Simulated and observed galaxy distributions: which is which?. Galaxy distribution. … the answer. Numerical  CDM simulations. Simulated large-scale structure for different cosmologies. Numerical  CDM simulations.

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Chapter 8 Structure Formation

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  1. Chapter 8Structure Formation Particle Astrophysics & Cosmology SS 2008

  2. Galaxy distribution Particle Astrophysics & Cosmology SS 2008

  3. Galaxy distribution Simulated and observed galaxy distributions: which is which? Particle Astrophysics & Cosmology SS 2008

  4. Galaxy distribution … the answer Particle Astrophysics & Cosmology SS 2008

  5. Numerical CDM simulations Simulated large-scale structure for different cosmologies Particle Astrophysics & Cosmology SS 2008

  6. Numerical CDM simulations The Millennium simulation Particle Astrophysics & Cosmology SS 2008

  7. Numerical CDM simulations Computational efforts … Particle Astrophysics & Cosmology SS 2008

  8. Numerical CDM simulations Movies cluster large galaxy Particle Astrophysics & Cosmology SS 2008

  9. Simulations and observations Power spectrum of galaxy distribution is accurately reproduced by simulations Particle Astrophysics & Cosmology SS 2008

  10. Simulations and observations hot dark matter is out! Particle Astrophysics & Cosmology SS 2008

  11. Problems with CDM Tully-Fischer relation is offset Particle Astrophysics & Cosmology SS 2008

  12. Problems with CDM galaxy Milky Way possesses too few satellite halos(“missing satellites”)works for Virgo Cluster cluster Particle Astrophysics & Cosmology SS 2008

  13. Problems with CDM galaxy cluster dashed: NFW halo yellow: stars red: gas magenta: Burkert halo blue: total Rotation curve of a dwarf galaxy:NFW profile ovepredicts central densities of DM in galaxies (‘cusp problem’) Particle Astrophysics & Cosmology SS 2008

  14. Web sites for numerical simulations http://www.mpa-garching.mpg.de/~volker/gadget/index.html http://www.mpa-garching.mpg.de/galform/millennium http://www.virgo.dur.ac.uk/new/index.php http://www.aip.de/People/MSteinmetz/Movies.html Particle Astrophysics & Cosmology SS 2008

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