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Workshop Materials High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 KICP workshop, 2014 Chicago, IL http://kicp-workshops.uchicago.edu/hem2014/ WORKSHOP MATERIALS http://kicp.uchicago.edu/ http://www.uchicago.edu/ The Kavli Institute for Cosmological Physics (KICP) at the University of Chicago is hosting a workshop this summer on the origin of the non-thermal extragalactic backgrounds. The goal is to bring together observers and theorists representing all the high-energy wavebands and particles: radio, GeV and TeV gamma rays, and extragalactic cosmic rays and neutrinos. Topics will include isotropic diffuse intensity measurements, resolved extragalactic source populations and their collective contributions below the individual source detection threshold, anisotropies, and propagation effects and secondary cascades. Example focus questions: * Is there a coherent scenario which explains all the current observations in terms of established extragalactic source populations? * What are the next steps (experimental + theoretical) to move past current uncertainties/degeneracies? We are planning a three-day workshop for about fifty participants convening on the campus of the University of Chicago. Each day will consist of plenary presentations with plenty of time for discussion in large and/or small groups. Workshop Topics: * Radio, gamma rays, neutrinos, UHECRs * Isotropic diffuse intensity measurements * Resolved extragalactic source populations and their collective contributions below the individual source detection threshold * Anisotropies * Propagation effects and secondary cascades Organizing Committee Keith Bechtol Ke Fang Toshihiro Fujii Kavli Institute for Cosmological Physics Kavli Institute for Cosmological Physics Kavli Institute for Cosmological Physics Dan Hooper Tim Linden Angela Olinto U Chicago/FNAL Kavli Institute for Cosmological Physics University of Chicago Abigail Vieregg University of Chicago High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL List of Participants 1. Kevork N Abazajian University of California, Irvine 2. Markus Ahlers WIPAC 3. Marco Ajello Clemson University 4. Keith Bechtol Kavli Institute for Cosmological Physics 5. Stella Boula University of Athens, Physics department, Greece 6. Sheldon S Campbell Ohio State University 7. Amy Connolly Ohio State University 8. Charles D. Dermer Naval Research Laboratory 9. Mattia Di Mauro University of Turin and INFN Turin 10. Alberto Dominguez University of California, Riverside 11. Fiorenza Donato Torino University 12. Ke Fang Kavli Institute for Cosmological Physics 13. Brian Fields University of Illinois 14. Nicolao Fornengo University of Torino and INFN 15. Toshihiro Fujii Kavli Institute for Cosmological Physics 16. Dimitrios Giannios Purdue 17. Jeff Grube Adler Planetarium 18. Dan Hooper U Chicago/FNAL 19. Yoshiyuki Inoue ISAS/JAXA 20. Eiji Kido Institute for Cosmic Ray Research, University of Tokyo 21. Alan Kogut NASA / GSFC 22. Kumiko Kotera Institut d'Astrophysique de Paris 23. Naoko Kurahashi Neilson University of Wisconsin 24. Brian Lacki NRAO/IAS 25. Tim Linden Kavli Institute for Cosmological Physics 26. Miguel A Mostafa Penn State 27. Pavel Motloch University of Chicago 28. Kohta Murase Institute for Advanced Study 29. Foteini Oikonomou Pennsylvania State University 30. Angela Olinto University of Chicago 31. Maria Petropoulou Purdue University 32. Vahe Petrosian Stanford University (Physics and KIPAC) 33. Paolo Privitera KICP 34. Gayle Ratliff Adler Planetarium/IIT Workshop materials http://kicp-workshops.uchicago.edu/hem2014/ 1 of 13 High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL 35. Miguel A Sánchez-Conde KIPAC/SLAC, Stanford 36. Jennifer Siegal-Gaskins Caltech 37. Jack Singal University of Richmond 38. Hajime Takami KEK 39. Tonia M Venters NASA GSFC 40. Tessa Vernstrom University of British Columbia 41. Abigail Vieregg University of Chicago 42. Gabrijela Zaharijas ICTP and INFN, Trieste Workshop materials http://kicp-workshops.uchicago.edu/hem2014/ 2 of 13 High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL WORKSHOP PROGRAM June 9-11, 2014 @ University of Chicago Monday - June 9, 2014 Welcome OBSERVATIONAL STATUS & ISOTROPIC DIFFUSE MEASUREMENTS Chair: Toshihiro Fujii 9:10 AM - 9:30 AM Jack Singal, University of Richmond The Cosmic Radio Background - Five Years of an Enigma 9:30 AM - 9:50 AM Alan Kogut, NASA / GSFC The Case for a Bright Extragalactic Radio Background 9:50 AM - 10:10 AM Keith Bechtol, Kavli Institute for Cosmological Physics Spectrum of the Isotropic Diffuse Gamma-ray Background from 100 MeV to 820 GeV 10:10 AM - 10:30 AM Miguel A Mostafa, Penn State First results from the HAWC Observatory 10:30 AM - 10:50 AM Coffee break 10:50 AM - 11:10 AM Naoko Kurahashi Neilson, University of Wisconsin Cosmic Neutrinos in IceCube 11:10 AM - 11:30 AM Eiji Kido, Institute for Cosmic Ray Research, University of Tokyo Recent results from the Telescope Array experiment 11:30 AM - 11:50 AM Abigail Vieregg, University of Chicago Radio Detection of Ultra-high Energy Neutrinos 11:50 AM - 12:30 PM Break-out Discussion 1 12:30 PM - 2:00 PM LUNCH CENSUS OF EXTRAGALACTIC SOURCES Chair: Ke Fang 2:00 PM - 2:20 PM Tessa Vernstrom, University of British Columbia The Radio Background: Recent estimates from discrete and extended sources 2:20 PM - 2:40 PM Brian Lacki, NRAO/IAS All Radiation Backgrounds from Star-Forming Galaxies 2:40 PM - 3:00 PM Brian Fields, University of Illinois Cosmic Rays and the Star-Forming Contribution to the GeV Background 3:00 PM - 3:20 PM Marco Ajello, Clemson University Contribution of Blazars and other source classes to the gamma-ray backgroud 3:20 PM - 3:40 PM Coffee break 3:40 PM - 4:00 PM Mattia Di Mauro, University of Turin and INFN Turin Composition of the Isotropic diffuse gamma-ray background and dark matter constraints. 4:00 PM - 4:20 PM Vahe Petrosian, Stanford University (Physics and KIPAC) On The Contribution of Discrete Sources to the Background Radiations 4:20 PM - 5:00 PM Break-out Discussion 2 5:00 PM - 6:30 PM Welcome Reception Workshop materials http://kicp-workshops.uchicago.edu/hem2014/ 3 of 13 High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL Tuesday - June 10, 2014 9:00 AM - 9:10 AM Welcome ANISOTROPIES Chair: Abigail Vieregg 9:10 AM - 9:30 AM Kevork N Abazajian, University of California, Irvine Constraints and Signals from the Diffuse Gamma Ray and X-ray Backgrounds 9:30 AM - 9:50 AM Hajime Takami, KEK Arrival distribution of ultra-high-energy cosmic rays and implications to their sources 9:50 AM - 10:10 AM Foteini Oikonomou, Pennsylvania State University Anisotropies in the arrival directions of ultra-high energy cosmic rays: current status and prospects with a next-generation instrument 10:10 AM - 10:30 AM Sheldon S Campbell, Ohio State University Combined Energy Spectra of Flux and Anisotropy: Identifying Anisotropic Source Populations of Gamma-rays or Neutrinos 10:30 AM - 10:50 AM Coffee break 10:50 AM - 11:10 AM Fiorenza Donato, Torino University Anisotropies in gamma-rays 11:10 AM - 11:30 AM Jennifer Siegal-Gaskins, Caltech Constraining the origin of the gamma-ray background with anisotropy 11:30 AM - 11:50 AM Nicolao Fornengo, University of Torino and INFN Particle dark matter searches in the anisotropic sky 11:50 AM - 12:30 PM Break-out Discussion 3 12:30 PM - 2:00 PM Lunch EBL ATTENUATION, SECONDARY CASCADES, & DARK MATTER Chair: Keith Bechtol 2:00 PM - 2:20 PM Yoshiyuki Inoue, ISAS/JAXA Does the near-infrared extragalactic background light excess come from the extragalactic sky? 2:20 PM - 2:40 PM Dimitrios Giannios, Purdue The fate of TeV photons from blazars 2:40 PM - 3:00 PM Tonia M Venters, NASA GSFC The Impact of Electromagnetic Cascades of Energetic Particles on the Extragalactic Gamma-ray Background 3:00 PM - 3:20 PM Alberto Dominguez, University of California, Riverside The measurement of the expansion rate of the Universe from gamma-ray attenuation 3:20 PM - 3:40 PM Coffee Break 3:40 PM - 4:00 PM Miguel A Sánchez-Conde, KIPAC/SLAC, Stanford Cosmological dark matter annihilation signals: theoretical predictions 4:00 PM - 4:20 PM Gabrijela Zaharijas, ICTP and INFN, Trieste Cosmological dark matter annihilation signals: experimental constraints 4:20 PM - 5:00 PM Break-out Discussion 4 Workshop materials http://kicp-workshops.uchicago.edu/hem2014/ 4 of 13 High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL Wednesday - June 11, 2014 9:00 AM - 9:10 AM Welcome MULTIWAVELENGTH & MULTIMESSENGER CONNECTIONS Chair: Dan Hooper 9:10 AM - 9:30 AM Kohta Murase, Institute for Advanced Study Multimessenger Approaches to the Origin of IceCube Neutrinos 9:30 AM - 9:50 AM Maria Petropoulou, Purdue University The role of hadronic cascades in GRB models of efficient neutrino production 9:50 AM - 10:10 AM Ke Fang, Kavli Institute for Cosmological Physics The TA Cosmic Ray Excess and High Energy Neutrinos 10:10 AM - 10:30 AM Markus Ahlers, WIPAC High-Energy Cosmogenic Neutrinos 10:30 AM - 10:50 AM Coffee Break 10:50 AM - 11:10 AM Amy Connolly, Ohio State University The Complementarity Neutrinos and Cosmic Rays for UHE Astrophysics 11:10 AM - 11:30 AM Kumiko Kotera, Institut d'Astrophysique de Paris Synchrotron pair echo/halo from ultrahigh energy cosmic rays: a robust scenario to explain extreme TeV blazar observations 11:30 AM - 11:50 AM Charles D. Dermer, Naval Research Laboratory Origin and Impact of Radiation Backgrounds on Detection of High-Energy Radiation Sources EXPERIMENTAL AND THEORETICAL OUTLOOK DISCUSSION Chairs: Angela Olinto and Tim Linden 11:50 AM - 12:30 PM Brainstorming and Discussion (Full Group) 12:30 PM - 2:00 PM Lunch (The End) Workshop materials http://kicp-workshops.uchicago.edu/hem2014/ 5 of 13 High-Energy Messengers: Connecting the Non-Thermal Extragalactic Backgrounds June 9-11, 2014 @ Chicago, IL Workshop Presentations 1.
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