Skip to Content

Search: {{$root.lsaSearchQuery.q}}, Page {{$root.page}}

ASTRONOMY COLLOQUIUM<br>Using Multiwavelength Variability Studies to Probe the Disk-Jet Connection of Fermi Blazars

  1. All News & Features
  2. All Events
    1. Archived Events
      1. 2013
      2. 2012
      3. 2011
      4. 2010
      5. 2009
      6. 2008
      7. 2007
      8. 2006
      9. 2005
      10. 2003
      11. 2002
      12. 2001
      13. 2000
      14. 1999
      15. HEP Astro
      16. Astronomy Colloquium
        1. <b>ASTRONOMY COLLOQUIUM</b><br>Tracing the Cosmic Shutdown of Star Formation in Massive Galaxies
        2. <b>ASTRONOMY COLLOQUIUM</b><br>The Effects of Magnetic Field Morphology on the Determination of Oxygen and Iron Abundances in the Solar Photosphere
        3. <b>ASTRONOMY COLLOQUIUM</b><br>Star Formation Across Space
        4. <b>ASTRONOMY COLLOQUIUM</b><br>Lonely Galaxies: The Baryon Content of Isolated Dwarf Galaxies
        5. <b>ASTRONOMY COLLOQUIUM</b><br>Choose Your Own Adventure: Multiplicity of Planets Among the Smallest Stars
        6. <b>ASTRONOMY COLLOQUIUM</b><br>Why the Invisible Reservoir of Gas Around Galaxies Counts in Galaxy Evolution
        7. <b>ASTRONOMY COLLOQUIUM</b><br>A Galaxy-Scale Fountain of Cold Molecular Gas Pumped by a Black Hole
        8. ASTRONOMY COLLOQUIUM
        9. ASTRONOMY COLLOQUIUM<br>Better Living Through Computation: Exploring the First Generations of Galaxies with Large-Scale Simulations
        10. ASTRONOMY COLLOQUIUM<br>The Search for Earth 2.0
        11. ASTRONOMY COLLOQUIUM<br>The Fast and Furious Lives of High Velocity Clouds
        12. ASTRONOMY COLLOQUIUM<br>Supernovae as Drivers of Dust Evolution in Galaxies
        13. ASTRONOMY COLLOQUIUM<br>How to Measure the Composition of Planet-Forming Material
        14. ASTRONOMY COLLOQUIUM<br>Direct Imaging of Extrasolar Planets and the Gemini Planet Imager
        15. ASTRONOMY COLLOQUIUM<br>Blowing in the Quasar Wind: Feedback from Black Hole Outflows in Major Galaxy Mergers
        16. ASTRONOMY COLLOQUIUM<br>Magellan/MDM Colloquium: Department Members Share Their Current Work Using Magellan/MDM Observatories
        17. ASTRONOMY COLLOQUIUM<br>The Fisk-Vanderbilt Masters-to-PhD Bridge Program: A Model for Increasing Diversity at the PhD Level in Physics & Astronomy
        18. ASTRONOMY COLLOQUIUM<br>Science, Symphony, and the Northern Lights
        19. ASTRONOMY COLLOQUIUM<br>Observing the Formation of Planetary Diversity
        20. ASTRONOMY COLLOQUIUM<br>Lies, Damned Lies, and Statistics: Empirical Constraints on Theories of Planet Formation
        21. ASTRONOMY COLLOQUIUM<br>Black People in Astronomy: Why So Few?
        22. ASTRONOMY COLLOQUIUM <br> Hot on the Trail of Warm Planets Orbiting Cool Stars
        23. ASTRONOMY COLLOQUIUM<br>Galaxy Clusters as Cosmological and Astrophysical Probes
        24. ASTRONOMY COLLOQUIUM <br> Discovery of a Thorne-Zytkow Object Candidate in The Small Magellanic Cloud
        25. ASTRONOMY COLLOQUIUM<br>Where's the Matter? (Tales from the Milky Way's Destructive Past)
        26. ASTRONOMY COLLOQUIUM<br>Measuring the Mass-Radius Relation of Neutron Stars
        27. ASTRONOMY COLLOQUIUM <br> Accretion Disk Outbursts: MHD Simulations (Finally) Confront Reality
        28. ASTRONOMY COLLOQUIUM <br> The Observability of Recoiling Black Holes as Offset Quasars
        29. ASTRONOMY COLLOQUIUM<br>Black Hole Masses in Active Galaxies
        30. ASTRONOMY COLLOQUIUM<br>Using Multiwavelength Variability Studies to Probe the Disk-Jet Connection of Fermi Blazars
        31. ASTRONOMY COLLOQUIUM<br>X-ray Reverberation Mapping in AGN
        32. 3rd Annual Astronomy Undergraduate Poster Session
        33. ASTRONOMY COLLOQUIUM<br>High-Energy-Density Astrophysics in the Laboratory
        34. SPECIAL ASTRONOMY COLLOQUIUM<br>Ralph Baldwin Prize in Astrophysics and Space Sciences<br>Lonely Massive Stars</br>
        35. ASTRONOMY COLLOQUIUM<br>Live Fast Die Young: The Evolution of Massive Stars towards their Death</br>
        36. ASTRONOMY COLLOQUIUM<br>Watching a Little Gas Cloud on its Way into the Galactic Supermassive Black Hole
        37. ASTRONOMY COLLOQUIUM<br>Dwarf Galaxies as Cosmological Probes
        38. SPECIAL ASTRONOMY COLLOQUIUM<br>The Magellan and MDM Observatories / Michigan Astronomy
        39. ASTRONOMY COLLOQUIUM<br>Seeing Worlds in Grains of Sand
        40. ASTRONOMY COLLOQUIUM<br>Mohler Prize Lecture<br>Lighting up the Universe: Witnessing Cosmic Dawn</br>
        41. ASTRONOMY COLLOQUIUM<br>The ALFALFA Census of Gas-Bearing Galaxies at z=0</br>
        42. ASTRONOMY COLLOQUIUM<br>Accretion Disk Outbursts: MHD Simulations (Finally) Confront Reality
        43. ASTRONOMY COLLOQUIUM<br>3D Spectroscopy of Giant H II Regions in Nearby Spiral Galaxies</br>
        44. ASTRONOMY COLLOQUIUM<br>Star Clusters and High Mass X-Ray Binaries in Nearby Spirals, Mergers, and Starburst Galaxies
        45. PUBLIC ASTRONOMY DISTINGUISHED ALUMNUS COLLOQUIUM | Cracking the Cosmic Code
        46. ASTRONOMY DISTINGUISHED ALUMNUS COLLOQUIUM
      17. Biophysics Seminar
      18. CM - AMO Seminars
      19. CM Theory Seminars
      20. Complex Systems
      21. Department Colloquia
      22. Quantitative Biology Seminars
      23. HET Brown Bag Series
      24. HET Seminars
      25. Life After Grad School Seminars
      26. Farrand Memorial Lecture
      27. Workshops & Conferences
      28. Miscellaneous
      29. Saturday Morning Physics
      30. Special Lectures
      31. Search Events
  3. Special Lectures
  4. K-12 Programs
  5. Saturday Morning Physics
  6. Seminars & Colloquia
Thursday, September 25, 2014
4:00 AM
411 West Hall

Blazars are active galactic nuclei whose relativistic jet is aligned at small angles (< 5°) with respect to the Earth line of sight. These relativistic jets produce radio through gamma-ray emission, via synchrotron radiation at long wavelengths and likely inverse Compton scattering at gamma-ray energies. Yet, much of the physics of blazar jets is still uncertain; e.g., it is not clear whether the gamma-rays come from sub-parsec or parsec scales or if there is one gamma-emitting site or many. To address these questions I take a two-fold approach: first comparing the observed broad emission line flux with Fermi gamma-ray flux and optical linear polarized flux to estimate its relationship to jet activity. Three sources showed statistically significant emission line variability, in close temporal proximity to Fermi gamma-ray flares, which I will discuss further in this talk. Secondly, I compare the optical and near-infrared (OIR) flux and color to the Fermi gamma-ray flux on similar cadence and present a schematic representation of the long-term OIR color variability. Using this schematic, changes in the relative contribution of the disk and jet emission, migration of the gamma-emitting region to outside the broad line region, and injections of higher energy electrons in the jet itself are shown to contribute to the long-term OIR color variability that we observe.?

Speaker: