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The Quasar 1317+520: A Laboratory for Particle Acceleration

The Quasar 1317+520: A Laboratory for Particle Acceleration. Svetlana Jorstad IAR, Boston U Alan Marscher IAR , Boston U Jonathan Gelbord U. Durham

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The Quasar 1317+520: A Laboratory for Particle Acceleration

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  1. The Quasar 1317+520: A Laboratory for Particle Acceleration Svetlana Jorstad IAR, Boston U Alan Marscher IAR , Boston U Jonathan Gelbord U. Durham Herman Marshall MIT Dan Schwartz SAO Diana Worrall U. Bristol Mark Birkinshaw U. Bristol Eric Perlman FIT

  2. 5 GHz C5 15 GHz at 15 GHz B-Array, 2 hr at 5 GHz A-Array, 2 hr Radio Observations with the VLA S5GHz = 396 mJy/beam S15GHz = 347 mJy/beam rms = 0.01 mJy/beam beam = 0.5'' x 0.5'', 0 z=1.06, D = 7.1 Gpc S5GHz = 104±15 mJy S15GHz = 40±8 mJy rad=0.83±0.03, S = - C5 =1.2 RC5 =4.3kpc

  3. 5 GHz C5 Aars & Hough 2005 at 15 GHz B-Array, 2 hr at 5 GHz A-Array, 2 hr Radio Observations with the VLBA Jjet/cjet ≈ 8.7 cos ≈ 0.4 =1- -2 - Lorentz factor app~5.7 core  5.7

  4. Spectral/Polarization Properties of the Jet

  5. Magnetic Fileld Structure in the Jet

  6. Infrared Observations with Spitzer Space Telescope IRAC with 5.4ks: 4.5m & 8m C5: S4,5m= 9.6±2.3 Jy S8m= 16.6±4.5 Jy IR=0.96±0.11

  7. C5 X-Ray Observations with Chandra: ACIS-S3, 18 ks, 0.2-6 keV NH=1.19x1020 cm-2 C5: x=0.75±0.30 S1keV =2.5±0.7 nJy

  8. 0.83±0.03 0.96±0.11 0.75±0.30 Prominent Feature C5 at 10'' from the Core blue contours - 0.2-6keV color scale - 8m pink contours - 5GHz

  9. http://jca.umbc.edu/~markos/cs Compton Shop The one-zone steady-state model: A sphere of a given radius is moving with a given Lorentz factor through an external photon field with a black body spectrum. An electron distribution with a power law is continuously injected in the sphere. The electrons suffer synchrotron and inverse Compton losses and eventually escape from the source. The system reaches a steady state when the equation for energy conservation is satisfied: Linj = Lloss + Lesc The code calculates synchrotron, total inverse Compton from all sources of photons, i.e., SSC and EC emission Redshift, z Lorentz factor,  Doppler factor,  Exponent for power law of the electron distribution, p min, max - minimum, maximum Lorentz factor of the electron distribution Comoving luminosity, Linj, erg/s Magnetic field, B, G External photon field Radius of the sphere, R, cm Escape time, tesc , in units of R/c Table 1. Parameters of Jet Components for 0827+243 Comp. CountsX-ray position Radio positionX-ray Size Radio Size Flux(0.2-6 keV) Radio Flux R" PA° R" PA° arcsec arcsec 10-14 erg cm-2 s-1 mJy Core 6703±82 0.97 0.002 212.5 2095.8 C1 7±3 2.50 154.5 2.71 157.8 0.25 0.16 0.26 0.06 C2 30±5 3.80 148.0 - - 0.50 - 0.83 < 0.04 C3 25±5 4.57 151.2 - - 0.55 - 0.89 < 0.04 C4 34±6 5.50 155.0 - - 0.85 - 1.13 < 0.04 C5 18±4 6.02 175.0 6.16 175.9 1.0 - 0.57 0.95 C6 1±1 - - 8.08 -160.0 - 0.55 <0.01 3.88 Table 1. Parameters of Jet Components for 0827+243 Comp. CountsX-ray position Radio positionX-ray Size Radio Size Flux(0.2-6 keV) Radio Flux R" PA° R" PA° arcsec arcsec 10-14 erg cm-2 s-1 mJy Core 6703±82 0.97 0.002 212.5 2095.8 C1 7±3 2.50 154.5 2.71 157.8 0.25 0.16 0.26 0.06 C2 30±5 3.80 148.0 - - 0.50 - 0.83 < 0.04 C3 25±5 4.57 151.2 - - 0.55 - 0.89 < 0.04 C4 34±6 5.50 155.0 - - 0.85 - 1.13 < 0.04 C5 18±4 6.02 175.0 6.16 175.9 1.0 - 0.57 0.95 C6 1±1 - - 8.08 -160.0 - 0.55 <0.01 3.88

  10. Spectral Energy Distribution of C5 z=1.06 =1.2 =1.2 p=2 min =10 max =107 Linj = 21046 erg/sec B = 15 G R = 1.31022 cm tesc =5 , CMB UB= 9.010-12 erg cm-3 Up= Linj/(4R2u)= 1.610-11 erg cm-3 u=c/tesc , =h/(mc2) tltcross=R/u=1.4106 yr Table 1. Parameters of Jet Components for 0827+243 Comp. CountsX-ray position Radio positionX-ray Size Radio Size Flux(0.2-6 keV) Radio Flux R" PA° R" PA° arcsec arcsec 10-14 erg cm-2 s-1 mJy Core 6703±82 0.97 0.002 212.5 2095.8 C1 7±3 2.50 154.5 2.71 157.8 0.25 0.16 0.26 0.06 C2 30±5 3.80 148.0 - - 0.50 - 0.83 < 0.04 C3 25±5 4.57 151.2 - - 0.55 - 0.89 < 0.04 C4 34±6 5.50 155.0 - - 0.85 - 1.13 < 0.04 C5 18±4 6.02 175.0 6.16 175.9 1.0 - 0.57 0.95 C6 1±1 - - 8.08 -160.0 - 0.55 <0.01 3.88 Table 1. Parameters of Jet Components for 0827+243 Comp. CountsX-ray position Radio positionX-ray Size Radio Size Flux(0.2-6 keV) Radio Flux R" PA° R" PA° arcsec arcsec 10-14 erg cm-2 s-1 mJy Core 6703±82 0.97 0.002 212.5 2095.8 C1 7±3 2.50 154.5 2.71 157.8 0.25 0.16 0.26 0.06 C2 30±5 3.80 148.0 - - 0.50 - 0.83 < 0.04 C3 25±5 4.57 151.2 - - 0.55 - 0.89 < 0.04 C4 34±6 5.50 155.0 - - 0.85 - 1.13 < 0.04 C5 18±4 6.02 175.0 6.16 175.9 1.0 - 0.57 0.95 C6 1±1 - - 8.08 -160.0 - 0.55 <0.01 3.88

  11. Magnetic Field Structure in C5

  12. The bright radio feature detected at 10 from the core has counter-parts at X-ray and IR wavelengths. 2. The SED of the feature suggests that the observed emission is produced via the synchrotron mechanism and EC/CMB process by a single population of relativistic electrons with Lorentz factors up to 107 and energy index ~3. 3. The jet in this region is mildly relativistic with Doppler factor  ~ 1.2 and magnetic field B ~ 15 G. 4. The jet most likely decelerates on kiloparsec scales by a factor of ~3 in  with respect to the parsec-scale jet flow. 5. The injection of particles of such high energies in the region seems to occur at an oblique shock front formed by the interaction of the jet with a cloud that is ramming it at an angle. 6. The particles stay in the region  1.4106 yr and cool efficiently. 7. The EC/CMB process should produce -ray emission that possibly can be detected with the GLAST. Conclusions

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