Cosmology with the extragalactic gamma-ray background Vasiliki Pavlidou University of Chicago.

Slides:

Advertisements

Similar presentations

The Kavli FoundationThe National Science Foundation Unidentified EGRET Sources and the Extragalactic Gamma-Ray Background Vasiliki Pavlidou University.

Advertisements

The Kavli FoundationThe National Science Foundation Guaranteed Unresolved Point Source Emission and the Gamma-ray Background Vasiliki Pavlidou University.

Deciphering the Gamma-Ray Sky: GeV Astronomy in the Era of GLAST Vasiliki Pavlidou Collaborators: Carolyn Brown Tonia Venters Jennifer Siegal-Gaskins Angela.

Combined Energy Spectra of Flux and Anisotropy Identifying Anisotropic Source Populations of Gamma-rays or Neutrinos Sheldon Campbell The Ohio State University.

Gamma-Rays and Blazars More Work for Variable Star Observers Gordon G. Spear Sonoma State University.

High Energy Neutrinos from Astrophysical Sources Dmitry Semikoz UCLA, Los Angeles & INR, Moscow.

Blazar Gamma-ray absorption by cosmic radiation fields GRB Fermi z~60-6 CTA Susumu Inoue (Kyoto University) with (more than) a little help from my friends.

The Diffuse Supernova Neutrino Background Louie Strigari The Ohio State University Collaborators: John Beacom, Manoj Kaplinghat, Gary Steigman, Terry Walker,

Upper Limit on the Cosmological  - Ray Background Yoshiyuki Inoue (Stanford) Kunihito Ioka (KEK) 1.

Observations of the isotropic diffuse gamma-ray emission with the Fermi Large Area Telescope Markus Ackermann SLAC National Accelerator Laboratory on behalf.

Moriond 04/02/09Benoit Lott New insight into Gamma-ray Blazars from the Fermi-LAT Benoît Lott CEN Bordeaux-Gradignan on behalf of the Fermi-LAT collaboration.

EGRET unidentified sources and gamma-ray pulsars I. CGRO mission and the instrument EGRET and it’s scientific goals II. Simple introduction of EGRET sources.

Galactic Diffuse Gamma-ray Emission, the EGRET Model, and GLAST Science Stanley D. Hunter NASA/GSFC Code 661

Diffuse Gamma-Ray Emission Su Yang Telescopes Examples Our work.

Anisotropy and Energy Spectrum of the CGB as probes of Dark Matter and Astrophysical Sources June 21-26, 2010, CCAPP, Ohio State University Shin’ichiro.

The Transient Universe: AY 250 Spring 2007 New High Energy Telescopes Geoff Bower.

Measuring the Diffuse Extragalactic Background Light as a function of redshift Cosmic History of Star Formation: Holy Grail of Observational Cosmology.

Deciphering the gamma-ray background: stafrorming galaxies, AGN, and the search for Dark Matter in the GeV Band. Vasiliki Pavlidou Einstein Fellow Shin’ichiro.

The Kavli FoundationThe National Science Foundation Constraining Populations of Extragalactic Gamma-ray Sources with the Extragalactic Gamma-ray Background.

The National Science FoundationThe Kavli Foundation AAS 211th meeting - Austin, TX Implications of Recent UHECR Data for Multi-Messenger Studies of Cosmic.

Gamma-ray Astronomy (The Short Story…). The Big Picture l Whole sky glows l Extreme environments l Probes of the Universe CGRO/EGRET All Sky Map.

Julie McEnery1 GLAST: Multiwavelength Science with a New Mission Julie Mc Enery Gamma-ray Large Area Space Telescope.

Gamma-Ray Luminosity Function of Blazars and the Cosmic Gamma-Ray Background: Evidence for the Luminosity-Dependent Density Evolution Takuro Narumoto (Department.

New Limits On The Density Of The Extragalactic Background Light From The Spectra Of All Known TeV Blazars Daniel Mazin Max-Planck-Institut für Physik,

Exploring the High Energy Universe where Particle Physics and Astrophysics Collide Prof. Lynn Cominsky Sonoma State University GLAST Education and Public.

14 July 2009Keith Bechtol1 GeV Gamma-ray Observations of Galaxy Clusters with the Fermi LAT Keith Bechtol representing the Fermi LAT Collaboration July.

Deciphering the gamma-ray background: star-forming galaxies, AGN, and the search for Dark Matter in the GeV Band. Vasiliki Pavlidou Einstein (Fermi) Fellow.

Cosmic Rays Discovery of cosmic rays Local measurements Gamma-ray sky (and radio sky) Origin of cosmic rays.

Multi-wavelength AGN spectra and modeling Paolo Giommi ASI.

1 Arecibo Synergy with GLAST (and other gamma-ray telescopes) Frontiers of Astronomy with the World’s Largest Radio Telescope 12 September 2007 Dave Thompson.

Gamma-ray Astronomy of XXI Century 100 MeV – 10 TeV.

Full Spectral Analysis of Galaxies - Are we there yet? Ben Panter, Edinburgh

Introduction to the modern observational cosmology Introduction/Overview.

Tijana Prodanović University of Illinois at Urbana-Champaign Brian D. Fields, UIUC John F. Beacon, OSU Probing Dark Matter and pre-Galactic Lithium with.

“Nature and Descendants of Sub-mm and Lyman-break Galaxies in Lambda-CDM” Juan Esteban González Collaborators: Cedric Lacey, Carlton Baugh, Carlos Frenk,

Discovery of  rays from Star-Forming Galaxies New class of nonthermal sources/gamma-ray galaxies (concept of temperature breaks down at high energies)

A Catalog of Candidate High-redshift Blazars for GLAST

Figure 5. The LAT and the GLAST spacecraft. GLAST will also carry a gamma-ray burst monitor, the GBM instrument. For more information about GLAST, see.

Observations of the Large Magellanic Cloud with Fermi Jürgen Knödlseder (Centre d’Etude Spatiale des Rayonnements) On behalf of the Fermi/LAT collaboration.

REDSHIFT MEASUREMENT OF EXTREMELY BEAMED BL LAC OBJECTS. A PIECE OF EVIDENCE FOR TEV ASTRONOMY AND FUNDAMENTAL PHYSICS. Marco Landoni – Oss. Astronomico.

The Universe >100 MeV Brenda Dingus Los Alamos National Laboratory.

ESAC_3_24_05.ppt 1 GLAST Large Area Telescope Overview and Science Update Peter F. Michelson Stanford University GLAST User’s Committee.

Anisotropies in the gamma-ray sky Fiorenza Donato Torino University & INFN, Italy Workshop on High-Energy Messengers: connecting the non-thermal Extragalctic.

Diffuse Emission and Unidentified Sources

Tijana Prodanović University of Novi Sad, Serbia Brian D. Fields University of Illinois at Urbana-Champaign Double Trouble: The Lithium Problems June 13.

Fermi LAT Discovery of Gamma-rays from the Giant Radio Lobes of Centaurus A C.C. Teddy Cheung (NRC/NRL) Lukasz Stawarz (ISAS/JAXA) Yasushi Fukazawa (Hiroshima)

Tijana Prodanović University of Illinois at Urbana-Champaign Brian D. Fields, UIUC John F. Beacon, OSU Probing Dark Matter and pre-Galactic Lithium with.

BBN abundance observations Karl Young and Taryn Heilman Astronomy 5022 December 4, 2014.

Science Capabilities - Summary 200  bursts per year  prompt emission sampled to > 20 µs AGN flares > 2 mn  time profile +  E/E  physics of jets and.

Gamma-ray Measurements of the distribution of Gas and Cosmic Ray in the Interstellar Space Yasushi Fukazawa Hiroshima University.

Peter F. Michelson Stanford University Principal Investigator, Large Area Telescope Collaboration on behalf of the Fermi LAT Collaboration.

1 Radio – FIR Spectral Energy Distribution of Young Starbursts Hiroyuki Hirashita 1 and L. K. Hunt 2 ( 1 University of Tsukuba, Japan; 2 Firenze, Italy)

Anita Reimer, HEPL/Stanford University GLAST-lunch talk, 23 February 2006 On the diffuse AGN contribution to the extragalactic  -ray background (EGRB)

Fermi LAT Observations of Galactic and Extragalactic Diffuse Emission Jean-Marc Casandjian, on behalf of the Fermi LAT collaboration 7 questions addressed.

Hiroyasu Tajima Stanford Linear Accelerator Center Kavli Institute for Particle Astrophysics and Cosmology October 26, 2006 GLAST lunch Particle Acceleration.

The Search for Black Holes

Active Galaxies Galaxies with extremely violent energy release in their nuclei (pl. of nucleus). → “Active Galactic Nuclei” (= AGN) Up to many thousand.

Fermi Gamma-ray Space Telescope Searches for Dark Matter Signals Workshop for Science Writers Introduction S. Ritz UCSC Physics Dept. and SCIPP On behalf.

Population Studies of the Unidentified EGRET Sources In collaboration with A. V. Olinto, V. Pavlidou, C. Brown, and B. D. Fields Image Credit: EGRET Team/NASA/Honeywell.

Multi-Channel Astrophysics & Cosmology at the Highest Energies Vasiliki Pavlidou University of Chicago.

07/12/061 Modeling a Black Hole Fill in your information here. Fill in your information here.

Cosmic-Ray Acceleration in galactic Interactions and its Implications Tijana Prodanović, University of Novi Sad Darko Donevski, Laboratoire d'Astrophysique.

A Search for Blazars among the Unidentified EGRET Gamma-Ray Sources.

Mathew A. Malkan (UCLA) and Sean T. Scully (JMU)

H.E.S.S. Blazar Observations:

Relativistic outflows and GLAST

X-Rays -> see you at COSPAR in July; also Kawai’s talk this conf.

Particle Acceleration in the Universe

Can Solar 6Li Really Be Explained by Galactic Cosmic Rays?

on behalf of the Fermi-LAT Collaboration

Presentation transcript:

Cosmology with the extragalactic gamma-ray background Vasiliki Pavlidou University of Chicago

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 Outline oEGRB vs CMB: information content oCosmology with the EGRB: constraining the Cosmic Star Formation Rate oThe future

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 EGRB vs CMB CMBEGRB oOrigin: cosmologicalcosmological truly diffuseunresolved point sources oForegrounds:Milky WayMilky Way oEnergies: ~ 2.7 K ~ 10 9 eV (1GeV) oSpectrum:blackbodypower law

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 EGRB: how is it measured? what does it look like? oSpace-born gamma-ray telescopes: EGRET aboard CGRO (1990’s) LAT aboard GLAST (about to be launched) o Take all -sky map, subtract: Emission from the Milky Way Point sources Credit: Strong et al 2004

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 What makes up the EGRB? oGuaranteed contributions: established classes of gamma-ray emitters Normal galaxies Active galaxies Extragalactic unidentified sources oTruly diffuse emission? oExotic physics?

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 And now… cosmology

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 The Cosmic Star Formation Rate oThe Cosmic Star Formation Rate: how much gas mass is converted to stars per unit time per unit cosmic volume oAn essential measure of: baryonic energy production feedback processes in galaxy formation stellar contribution to reionization metal production oTraditional measures: SF makes stars - young stars emit in UV, IR compilation by Hopkins & Beacom 2006

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 The SF - gamma-ray connection oStar Formation -> Supernovae -> Cosmic ray acceleration - > interaction with ISM -> gamma rays Characteristic normal galaxy spectral feature imprinted on spectral shape of gamma-ray background oStar Formation -> Background starlight (EBL) -> interaction with gamma rays EBL imprinted on spectra of: individual  -ray sources,  -ray background Starforming galaxies (VP & Fields 2002) Unidentified sources (VP, Siegal-Gaskins, Fields, Olinto & Brown 2007) Blazars (VP & Venters 2007) EGRET gamma-ray background, conservative (Strong et al 2004) Maximal EGRET gamma-ray background (Sreekumar et al 1998) Stecker 1999

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 How do we utilize this connection? oUntil now: use knowledge of CSFR to predict signal/effects for gamma-ray telescopes oThe future: GLAST observations will allow inversion of the problem: use observations of gamma-ray signal/effects to constrain CSFR oUncertainties: significant, BUT largely uncorrelated with uncertainties of low-E methods Strigari, Beacom, Walker & Zhang 2005 Prodanovic, VP & Fields preliminary

Vasiliki Pavlidou Great Lakes Cosmology Workshop 8 Ohio State University, 01June 2007 Conclusions oCosmic star formation history imprinted on extragalactic gamma-ray background: Normal galaxy spectral ≈ 1GeV EBL absorption ≥20GeV oGLAST will: resolve thousands of bright point sources (e.g. AGNs) but at most 3 normal galaxies -> normal galaxy feature expected to become visible Probe the >20GeV regime, map the shape of high-E absorption feature oA new era: observations of the EGRB can strongly constrain the cosmic history of star formation