Sites of Particle Acceleration in Quasar Jets Alan Marscher Boston University Research Web Page: www.bu.edu/blazars.

Slides:

Advertisements

Similar presentations

Connection between the parsec-scale radio jet and γ-ray flare in the blazar Venkatessh Ramakrishnan Aalto University Metsähovi Radio Observatory,

Advertisements

Radio and X-ray emission in radio-quiet quasars Katrien C. Steenbrugge, Katherine M. Blundell and Zdenka Kuncic Instituto de Astronomía, UCN Department.

Determining the location of the GeV emitting zone in fast, bright blazars Amanda Dotson, UMBC Markos Georganopoulos (advisor), UMBC/GSFC Eileen Meyer,

Flare peak analysis v.s. core shift ： The same optical thickness transition surface? Valtaoja, A&A, 254, 71 (1992) Flare peak analysis Haga+, EPJWC, 61,

Method To determine the multiplicity parameter and the magnetization parameter  one can use the dependence on the visible position of the core of the.

Cyclotron & Synchrotron Radiation

Multi-Wavelength Polarizations of Western Hotspot of Pictor A Mahito Sasada (Kyoto University) S. Mineshige (Kyoto Univ.), H. Nagai (NAOJ), M. Kino (JAXA),

Particle acceleration in active galaxies – the X-ray view Martin Hardcastle (U. Herts) Thanks to many co-authors including Ralph Kraft (CfA), Judith Croston.

X-ray synchrotron radiation and particle acceleration Martin Hardcastle University of Bristol, UK with Diana Worrall & Mark Birkinshaw (Bristol), Dan Harris.

Radio halos and relics in galaxy clusters. NGC315: giant (~ 1.3 Mpc) radio galaxy with odd radio lobe (Mack 1996; Mack et al. 1998). precessing jets (Bridle.

Modeling Variability of Blazar Jets with a Turbulent Magnetic Field Alan Marscher Institute for Astrophysical Research, Boston University Research Web.

Low frequency results from the GMRT and the role of the E-LOFAR Dharam Vir Lal (MPIfR, Bonn)

VLBI Imaging of a High Luminosity X-ray Hotspot Leith Godfrey Research School of Astronomy & Astrophysics Australian National University Geoff Bicknell,

Svetlana Jorstad Connection between X-ray and Polarized Radio Emission in the Large-Scale Jets of Quasars.

Multi-Wavelength Time Variability of Active Galactic Nuclei Ritaban Chatterjee Advisor: Prof. Alan P. Marscher Collaborators: Svetlana Jorstad (B.U.),

Centaurus A Kraft, Hardcastle, Croston, Worrall, Birkinshaw, Nulsen, Forman, Murray, Goodger, Sivakoff,Evans, Sarazin, Harris, Gilfanov, Jones X-ray composite.

X-ray Observations of Large Scale Jets in AGN D. E. Harris, SAO Collaborators: H. Krawczynski, C. Cheung, S. Jester, M. Hardcastle E. Perlman, J. Biretta,

VLBA polarimetry of the Fermi-detected quasar B : a rare “spine and sheath” polarisation structure Jun Yang (JIVE, Netherlands) Alaxander B. Pushkarev.

Near and Far: Connections between Space Science and Astronomy New England Space Science Meeting March 1, 2006.

L. Rudnick - Krakow - June 2006 Particle distributions in large scale radio jets Lawrence Rudnick University of Minnesota.

The Long, Bright Extended X-ray Jet of OJ287 Alan Marscher & Svetlana Jorstad Boston University Research Web Page:

Radio galaxies in the Chandra era AGN jet flows Mark Birkinshaw University of Bristol.

Multi-Wavelength Time Variability of Active Galactic Nuclei Ritaban Chatterjee Advisor: Prof. Alan P. Marscher Collaborators: Svetlana Jorstad (B.U.),

Direct imaging of AGN jets and black hole vicinity Tiziana Venturi Active Galactic Nuclei 9 Ferrara,

AGN (Continued): Radio properties of AGN I) Basic features of radio morphology II) Observed phenomena Superluminal motion III) Unification schemes.

Radio and X-Ray Properties of Magellanic Cloud Supernova Remnants John R. Dickel Univ. of Illinois with: D. Milne. R. Williams, V. McIntyre, J. Lazendic,

Institute for Astrophysical Research (Boston University) Iván Agudo 1,2 with the collaboration of S. G. Jorstad 2, A. P. Marscher 2, V. M. Larionov 3,4,

The quasar PKS : Direct evidence for a changing orientation of the central engine. John Wardle (Brandeis), Dan Homan (NRAO), C. C. Cheung & Dave.

S. Jorstad / Boston U., USA A. Marscher / Boston U., USA J. Stevens / Royal Observatory, Edinburgh, UK A. Stirling / Royal Observatory, Edinburgh, UK M.

Multiwaveband Opportunities to Study AGN (Mostly Blazars) Detected by Fermi Alan Marscher Boston University, Incoming Chair of Fermi Users Group Research.

Active Galaxies Definition – –Amount of Energy –Type of Energy Non-thermal Polarized Other characteristics –Emission spectra Hydrogen – Balmer series &

The jet of Mrk 501 from millions of Schwarzschild radii down to a few hundreds Marcello Giroletti INAF Istituto di Radioastronomia and G. Giovannini, G.

Time dependent modeling of AGN emission from inhomogeneous jets with Particle diffusion and localized acceleration Extreme-Astrophysics in an Ever-Changing.

I.Introduction  Recent evidence from Fermi and the VLBA has revealed a strong connection between ɣ -ray emission in AGNs and their parsec-scale radio.

GLAST & Multiwaveband Monitoring as Probes of Bright Blazars Alan Marscher Boston University Research Web Page:

3C120 R. Craig Walker National Radio Astronomy Observatory Socorro, NM Collaborators: J.M. Benson, S.C. Unwin, M.B. Lystrup, T.R.Hunter, G. Pilbratt, P.E.

High-resolution observations of powerful radio sources Monica Orienti Almudena Prieto 13/12/2007 Monica Orienti – IAC.

AGN Jets: A Review for Comparison with Microquasars & GRBs Alan Marscher Boston University Research Web Page:

Four hot DOGs eaten up with the EVN Sándor Frey (FÖMI SGO, Hungary) Zsolt Paragi (JIVE, the Netherlands) Krisztina Gabányi (FÖMI SGO, Hungary) Tao An (SHAO,

Jet dynamics and stability Manel Perucho Universitat de València The innermost regions of relativistic jets and their magnetic fields Granada, June 2013.

Blazars: VLBA and GLAST Glenn Piner Whittier College.

S. Jorstad / Boston U., USA /St. Petersburg State U., Russia A.Marscher / Boston U., USA M. Lister / Purdue U., USA A. Stirling / U. of Manchester, Jodrell.

Probing the Inner Jet of the Quasar PKS 1510  089 with Multi-waveband Monitoring Alan Marscher Boston University Research Web Page:

The core shift measurements for two-sided jets affected by Free-Free absorption using VLBA Takafumi Haga (SOKENDAI/ISAS) Collaborators Akihiro Doi, Yasuhiro.

Polarization of AGN Jets Dan Homan National Radio Astronomy Observatory.

AGN Science with SKA Motoki Kino (NAOJ) On behalf of SKA-Japan AGN sub-WG Japan-SKA workshop (Nov. 5 th 2010, NAOJ) (C) J. McKean Cygnus A at 240 MHz with.

ABSTRACT April 2000 CMVA observations of the sources 3C273 and 3C279 resulted in the first VLBI total intensity and linear polarization images of any source.

The Quasar : A Laboratory for Particle Acceleration Svetlana Jorstad IAR, Boston U Alan Marscher IAR, Boston U Jonathan Gelbord U. Durham Herman.

VLBA Imaging of the γ -ray Emission Regions in Blazar Jets or: A Sequence of Images is Worth 1000 Light Curves Alan Marscher Boston University Research.

Galaxies with Active Nuclei Chapter 14:. Active Galaxies Galaxies with extremely violent energy release in their nuclei (pl. of nucleus).  “active galactic.

Gabriele Giovannini Marcello Giroletti Gregory B. Taylor Dipartimento di Astronomia, Bologna University Istituto di Radioastronomia, INAF Bologna Dept.

Marcello Giroletti INAF Istituto di Radioastronomia and

AGN: Linear and Circular Polarization

Dependence of the Integrated Faraday Rotations on Total Flux Density in Radio Sources Chen Y.J, Shen Z.-Q.

Abstract We present multiwavelength imaging and broad-band spectroscopy of the relativistic jets in the two nearby radio galaxies 3C 371 and PKS ,

Multi - emission from large-scale jets Fabrizio Tavecchio INAF – Osservatorio Astronomico di Brera.

Mapping Magnetic Field Profiles Along AGN Jets Using Multi-Wavelength VLBI Data Mark McCann, Denise Gabuzda Department of Physics, University College Cork,

Constraining the Location of Gamma-ray Emission in Blazar Jets Manasvita Joshi, Boston University Collaborators: Alan Marscher & Svetlana Jorstad (Boston.

Mapping the U.S. Scientific Future in VLBI ftp.aoc.nrao.edu/pub/VLBIfuture VLBI Future Committee: Shep.

The University of Sheffield Joanna Holt 20 th October 2006 Emission line outflows: the evidence for AGN-induced feedback Clive Tadhunter.

Images were sourced from the following web sites: Slide 2:commons.wikimedia.org/wiki/File:BorromeanRing...commons.wikimedia.org/wiki/File:BorromeanRing...

Radio Loud and Radio Quiet AGN

Gamma Rays from the Radio Galaxy M87

VLBA Observations of Blazars

Magnetohydrodynamics of pulsar winds and plerions

How to classify a Gamma -ray source as a Blazar

Gamma-ray emission along the radio jet:

Galaxies With Active Nuclei

Galaxies With Active Nuclei

Compact radio jets and nuclear regions in galaxies

Presentation transcript:

Sites of Particle Acceleration in Quasar Jets Alan Marscher Boston University Research Web Page:

Jets of Quasars 43 GHz 1 mas = 2.6 pc Knots require particle acceleration Spectral energy distribution (SED) reveals very high E component with nearly flat power-law electron energy distribution N(E) as well as another with steeper N(E) Compact jet: SED of individual knots not defined over broad spectral range, could either be a power law or closer to monoenergetic; polarization generally oblique to jet axis

Emission Regions in an AGN Issues: Origin of bright knots: oblique shocks? Something else? Core of jet seen on VLBI images: site of standing shock, reconnection, or end of flow acceleration? Rampant particle acceleration many kpc downstream: shocks? Unbeamed Beamed

Sketch of Physical Structure of Jet, AGN