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Particle Physicists and Astrophysicists working together?

Particle Physicists and Astrophysicists working together?.

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Particle Physicists and Astrophysicists working together?

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  1. Particle Physicists and Astrophysicists working together? • Simon White said in a recent paper: “By uncritically adopting the values of an alien system, astronomers risk undermining the foundations of their own current success and endangering the future vitality of their field.” (Simon White; Summer 2006, astroph) • David Gross strongly disagreed. • Is there a culture clash? Who is right? Is this conference ruining all of us in attendence???

  2. (Dunkley: WMAP)

  3. What I like about these parameters is that they confirm a theory I’ve been using for years! • Within errors our Universe is defined by: h = WDE = 1 - Wtot = 1/ √ 2 = 0.707 (Joke) • It much more satisfying that this CMB h agrees with the best number from the HST Hubble key project, as Saurabh Jha told us: H0 = 73 ± 6 km/s/Mpc, but it was slightly disturbing that you get this answer by averaging two independent analyses of the same data! This actually continues a very long tradition in astrophysics (Sandage 50 vs. deVac 100!), but needs to get straightened out one of the these decades. • Also we heard from Jha about the weird Hubble Bubble, something I hope will just go away.

  4. Summary : Baryon Density Determinations D & 3He agree with the CBR Depleted ? N< 3 ? (Steigman: BBN)

  5. “Third year” SNLS Hubble Diagram (preliminary) 3/5 years of SNLS 250 distant SNe Ia ΩM=0.3, Ωλ=0 ΩM=1.0, Ωλ=0 Reynald Pain told us about the French/Canadian SNLS:

  6. 3-yr cosmological Constraints (Preliminary) WMAP-3 SNe 7% measure of w SNe BAO BAO SNLS+BAO (No flatness) SNLS + BAO + simple WMAP + Flat

  7. Three Year Yield: 135 SNe, 50 SNe Ia, 25 SNe Ia at z>1 SNe Ia at z>1 Appear Consistent with z<0.1 (Adam Riess: HST SN1a)

  8. Confirmation of the Dark Matter/Dark Energy Model G R O U N D S P A C E Riess et al. 2004, 2007 Determining the nature of dark energy, its time variability

  9. (Alex Kim: SCP)

  10. From Peter Garnavitch, we learned more about SN1a: • SN1a may be better standard candles in the IR (less dust?) • More SN1a in younger populations than ellipticals! • Old galaxies may give fainter SN1a! • “Dark Energy is good for astrophysics”!!! These effects may be small, but are remarkable and certainly call for more study. Systematics such as these may give the ultimate limit for SN1a as standard candles.

  11. Delayed Detonation – Phenomenological Type Ia Model: White Dwarf ignites, burns slowly and expands, then detonates. deflagration (Sdef - parameter) DDT (transition density rtr - parameter) detonation ignition Carbon-Oxygen Silicon-group elements(28Si,…) Iron-group elements (56Ni,…) (Alexei Khokhlov: SNIa)

  12. Detonation Phase of Explosion Confirms one-dimensional DD model. Qualitatively agrees with observations. Asymmetries predicted.

  13. The power of weak lensing: DM and DE Weak lensing mass contours (HST) Extended x-ray emission (XMM-Newton) Galaxy number density (Subaru/CFHT) Galaxy stellar mass (Subaru/CFHT) R. Massey et al. (Nature 2007)

  14. “Bullet” cluster 1E0657-56 Doug Clowe, Marusa Bradac et al. (Astrophysical Journal 2006) 1.5’

  15. GLAST Large Area Telescope Overview Igor V. Moskalenko HEPL - KIPAC Stanford University Representing the GLAST Collaboration International workshop on the interconnection between particle and cosmology (PPC07) College Station, TX, May 14 – 18, 2007

  16. Win de Boer told us that already EGRET has the signal of DM! Including a ring made by the Canus Majoris Dwarf galaxy. • Eiichiro Komatsu told us the same, including contributing much of the extra-galactic background. • Thus we are really wanting to see what AMS and especially GLAST will give us ->

  17. A.Morselli

  18. The Galaxy Shinning in High Energy Gammas from the Annihilation of Dark Matter

  19. Peskin told us we can get Wimp masses from LHC, but will probably need ILC to get the cross sections • Tovey among others told us we need both LHC, and direct/indirect detection to prove we know what the DM is • Gould told us what the dark matter is not (Machos)

  20. And finally, we heard that 1/3 of stars have cold Neptune mass planets! Neither particle physics nor cosmology… yet!

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