From Cosmic Dawn till Cosmic Dusk with Merging Clusters

Transcription

1 with Merging Clusters Austin Hoag, Kuang-Han Huang, Russell Ryan, Brian Lemaux, Tommaso Treu, Anja von der Linden, Adriano Fontana, Anthony Gonzalez, Dennis Zaritsky, Will Dawson, Annika Peter, Steve Allen, Douglas Clowe, Maxim Markevitch, Bill Forman, Christine Jones, Tim Schrabback, Dennis Zaritsky, Richard Massey, Roger Blandford, Phil Marshall, Douglas Applegate

2 Snowcluster 201?

3 Looking at the dark matter from many directions LHC Fermi, Early Universe Galaxy formation Xenon, CDMS, Dama, etc. adapted from Peter et al. 2012

4 The Bullet Cluster 1E Weak Lensing Clowe, MB et al. 2006

5 The Bullet Cluster 1E Weak + STRONG Lensing Hall, MB et al. 2012

6 Dark Matter Properties Combining the Chandra data with lensing mass maps -> place an upper bound on the dark matter self-interaction cross section σ/m < 1 cm 2 g 1 = 1.8barn/GeV (Markevitch et al. 2004). -> Significant offset between subcluster X-ray gas core and dark matter peak gives σ/m < 10 cm 2 g 1 -> Survival of the subcluster dark matter peak during interaction gives σ/m < 3 cm 2 g 1 -> No loss of mass from subcluster during interaction gives σ/m < 0.8 cm 2 g 1 σ/m < 0.7 cm 2 g 1 = 1.3barn/GeV (Randall et al.2008) SI dark matter σ/m < 0.5 5cm 2 g 1 (Davé et al. 2001).

7 Challenge σ/m < 0.7 cm 2 g 1 Randall et al σ/m < 4 cm 2 g 1 Bradač et al σ/m < 3 cm 2 g 1 Merten et al σ/m < 3 cm 2 g 1 Clowe et al σ/m < 7 cm 2 g 1 Dawson et al Will we ever do better?

8 Breaking Cosmic Dawn

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10 DETECT + YOUNG STELLAR POPULATION LENSING IS FANTASTIC Old stellar population TOPOLOGY OF REIONIZATION,z CONFIRMATION

11 LENSING IS FANTASTIC YOUNG STELLAR POPULATION

12 Coe et al z=11 z=9.8 Zitrin et al. 2014

13 LENSING IS FANTASTIC Old stellar population

14 Spitzer Star formation at z>7 z 8 Age 290Myr Z 0.4Z Metallicity 5Myr

15 SURFS UP: Spitzer UltRa Faint SUrvey Program Exploration Science Spitzer Program for Cycle 9 (PI Bradač) Over 550 hours with Spitzer for 10 clusters Think Spitzer-UDF depth, but assisted by lensing! SurfsUp.html Bradač et al (ApJ) Ryan et al (ApJL) Huang et al. 2015a (in prep.) Huang et al. 2015b (in prep.)

16 SURFS UP: Spitzer UltRa Faint SUrvey Program Exploration Science Spitzer Program for Cycle 9 (PI Bradač) Over 550 hours with Spitzer for 10 clusters Think Spitzer-UDF depth, but assisted by lensing! SurfsUp.html Bradač et al (ApJ) Ryan et al (ApJL) Huang et al. 2015a (in prep.) Huang et al. 2015b (in prep.)

17 SURFS UP: Spitzer UltRa Faint SUrvey Program Bradač et al (ApJ) Ryan et al (ApJL)

18 SURFS UP Cast RXJ Bullet Cluster MACSJ MACSJ MACSJ MACSJ MACSJ MACSJ MACSJ RCS

19 MACS1149-zD 22 λrest λ rest [µm] Observed brightness [AB] Intrinsic brightness [AB] λobs 1 10 λ obs [µm] Zheng et al. 2012, Bradač et al. 2014

20 MACS1149-zD λrest YOUNG λ rest [µm] OLD Observed brightness [AB] Intrinsic brightness [AB] λobs 1 10 λ obs [µm] Zheng et al. 2012, Bradač et al. 2014

21 Distinguished stellar populations 10 Myr 300 Myr The age of the universe at z 9.5 is 500Myr. Huang et al. 2015a in prep.

22 SURFS UP marches on M M z=7.1 Huang et al. 2015a in prep. 10 Myr 480 Myr

23 ssfr to z=9.5 Huang et al. 2015b in prep.

24 Super deeep cluster data Bullet Cluster with Spitzer probe the stellar mass function of cluster members to depths of <10 8 M (or L ) comparable in depth of local clusters, such as the Coma cluster and the Shapley Supercluster Bradač et al (ApJ) Ryan et al (ApJL)

25 LENSING IS FANTASTIC TOPOLOGY OF REIONIZATION z CONFIRMATION s

26 Breaking cosmic dawn Patchy ε = 0.5 Smooth ε = 0.5

27 Patchy vs. smooth Pentericci et al. 2014, Treu et al. 2013

28 Schmidt et al. in prep.

29 Summary Lensing is allowing us to push into until now unexplored territory Dark matter is (still) collisionless. There seem to exist evolved stellar population at the time when universe is only a procent of its present age Stars might have formed earlier than previously thought. LENSING IS FANTASTIC

30 SN Refsdal Lens: an elliptical cluster member at z=0.544 Kelly (incl MB) et al Source: Face on spiral galaxy (similar to a Milky Way) with a bright Supernovae at z=1.5

31 Teaching: Physics of California Physics of skiing, surfing, and scuba diving... University of Utah add UC Davis class

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