Download presentation
Presentation is loading. Please wait.
1
Roger Blandford KIPAC Stanford
High Energy -rays Roger Blandford KIPAC Stanford
2
The Electromagnetic Spectrum
ir o uv x g r mm smm 100TeV mec2 mpc2 100neV 1GeV 5 iii 08 CFAR High Energy -rays
3
Multi-Messenger Science
High Energy -rays Signals! Electromagnetic Cosmic Rays Strong Scientific Synergy Neutrinos Dark Matter Gravitational Radiation 10-32eV 1028eV Cosmology Hubble Planck 5 iii 08 CFAR
4
Gamma Ray Astrophysics
GeV observations from space Direct detection SAS-2 -> CosB -> EGRET -> GLAST TeV observations from ground Atmospheric Cerenkov Whipple -> HESS/MAGIC/VERITAS ->… Water Cerenkov Milagro ->… 5 iii 08 CFAR
5
GLAST Joint NASA-DOE-Italy- France-Japan-Sweden, Germany… mission
Launch May Cape Canaveral Success of GLAST is top priority x EGRET; high energy extension Future program likely ground-based for a while 5 iii 08 CFAR
6
GLAST LAT GBM Sources after a decade? 0.02 - 300 GeV
2.5 sr, m2 5o - 5’resolution ln E ~ 0.1 3 x 10-9 cm-2 s-1 (>0.1 GeV, point source) 109 photons (3Hz) All sky every 3hr Sources after a decade? 10,000 Active Galactic Nuclei 1000 Gamma Ray Bursts 100 Pulsars 100 Supernova Remnants 10 Galaxies 10 Clusters of Galaxies 10 X-Ray Binaries ? Unidentified Sources GBM MeV 9sr, 100 cm2. 1o resolution ln E ~ 0.1 Combine with Swift 5 iii 08 CFAR
7
Exploring the Terascale
MAGIC x 2 VERITAS (NSF+DOE+Smithsonian) H.E.S.S. (2) ~10 ns flash 10 km->104 m2 Stereo imaging ~ TeV ~5o field of view ~5’ PSF per photon ~100 sources Milagro ~1-10 TeV 5 iii 08 CFAR
8
Hadrons vs Leptons vs WIMPS (Pions vs Compton vs Annihilation)
X-ray vs TeV Fermi acceleration at shocks Magnetic field amplification Origin of cosmic rays? Many puzzles remain GLAST will interpolate Relativistic jets created by massive black hole in galactic nuclei Gamma ray emission at small radii Inverse Compton radiation 2 min variability? EM -> L -> H ? RFF? UHECR? If DM is cosmologically-generated, weakly interacting massive particle, there may be detectable annihilation from Galactic center and dwarf galaxies. Constraints will be combined with results from LHC and underground direct searches. Must understand diffuse background! 5 iii 08 CFAR
9
Cosmic Accelerators Stochastic acceleration Unipolar induction u u / r
B L UHECR? Neutron stars Black holes V ~ TeV - ZeV I ~ 10 GA - 10 EA Shocks transmit power law distribution f(p) ~ p-3r/(r-1) Also second order processes V ~ I ~ V / Z0 P ~ V I Spend sentence on Background: cosmic rays Use shower direction as transition 5 iii 08 CFAR
10
Gamma Ray Bursts Expect Unscripted Discoveries SN energy in seconds
Birth cry of stellar black hole? Special supernovae Binary NS merger?? LIGO! NS magnetosphere flare (1015G) Environmental impact Ultrarelativistic outflow “AGN on speed” opacity used to understanding sources Across the universe Cosmological probes Expect Unscripted Discoveries 5 iii 08 CFAR
11
Future TeV Options AGIS/CTA 150 m (30 tanks) 10-100 x sources
DAQ trailer Road HAWC Tank Array in GEANT 4 150 m (30 tanks) AGIS/CTA x sources DM, LI studies Unexpected ~ TeV ~ 50 telescopes Large FOV ~1’ PSF per photon ~10 x VERITAS sensitivity ~ $100M class Exploring cheaper detectors ~1-100 TeV ~15 x Milagro Improved rejection Wide field Large duty cycle $10M class Technology and scientific trade studies underway-> decadal survey HESS/VERITAS Simulation AGIS/CTA Simulation 5 iii 08 CFAR
12
Propagation Effects EBL absorption Already interesting Hard sources
Variable c??? Violation of LI Testable! Shower models probe CM GLAST IACT HAWC 5 iii 08 CFAR
13
Auger N?? 5 iii 08 CFAR
14
Summary Golden age of Cosmic HE -rays
Support GLAST, VERITAS as they solve classic astrophysical problems and explore fundamental physics Next phase will be just as exciting and is (relatively) inexpensive and quick Invest in the future now 5 iii 08 CFAR
15
Cultural Observations
Particle physicists, astrophysicists collaborating very well. Organized more like HEP Interagency collaboration “debugged” Common detector technology GLAST: Si tracking technology… AGIS/CTA: photodetectors, fast electronics, triggers, computing… Proven signals cf DM, GW, VHEaxion… searches Excellent, hands on training for students and postdocs Fabrication and data analysis 5 iii 08 CFAR
16
Gamma-ray Physics DoE/HEP Mission High Energy -rays
…understand how our universe works at its most fundamental level …discovering the most elementary constituents of matter and energy …exploring the basic nature of space and time itself …development of key technologies and trained manpower discover the nature of cosmic accelerators and monitor galaxy growth and development seek annihilation signature of supersymmetry particles in combination with LHC, underground check validity of Lorentz invariance over cosmic distances attract and train students who will be needed to work on future detectors and their data GLAST IACT HAWC 5 iii 08 CFAR
Similar presentations
