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Extragalactic Jets from Radio to Gamma-rays

Published online by Cambridge University Press:  11 September 2023

E. Meyer Open the ORCID record for E. Meyer [Opens in a new window] ,
A. Shaik ,
K. Reddy  and
M. Georganopoulos
E. Meyer
Affiliation:
University of Maryland Baltimore County, 1000 Hilltop Cir, Baltimore MD 21250, USA
A. Shaik
Affiliation:
University of Maryland Baltimore County, 1000 Hilltop Cir, Baltimore MD 21250, USA
K. Reddy
Affiliation:
School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA
M. Georganopoulos
Affiliation:
University of Maryland Baltimore County, 1000 Hilltop Cir, Baltimore MD 21250, USA NASA Goddard Space Flight Center, Greenbelt, MD USA
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Abstract

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Despite the fact that jets from black holes were first understood to exist over 40 years ago, we are still in ignorance about many primary aspects of these systems – including the radiation mechanism at high energies, the particle makeup of the jets, and how particles are accelerated, possibly to energies as high as 100 TeV and hundreds of kpc from the central engine. We focus in particular on the discovery (and mystery) of strong X-ray emission from radio jets on kpc-scales, enabled by the unequaled high resolution of the Chandra X-ray observatory. We review the main evidence for and against the viable models to explain this X-ray emission over the last 20 years. Finally, we present results of a recent study on the X-ray variability of kpc-scale jets, where we find evidence that between 30-100% of the X-ray jet population is variable at the tens-of-percent level. The short (∼years) variability timescale is incompatible with the IC/CMB model for the X-rays and implies extremely small structures embedded within the kpc-scale jet, and thus requires a reconsideration of many assumptions about jet structure and dynamics.

Keywords

AGNBlazarJetsVariability

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S375: The Multimessenger Chakra of Blazar Jets , December 2021 , pp. 1 - 8
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

References

Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Brandt, T. J., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Cannon, A., Caraveo, P. A., Casandjian, J. M., Çelik, Ö., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Costamante, L., Cutini, S., D’Ammando, F., Dermer, C. D., de Angelis, A., de Luca, A., de Palma, F., Digel, S. W., do Couto e Silva, E., Drell, P. S., Drlica-Wagner, A., Dubois, R., Dumora, D., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grondin, M. H., Grove, J. E., Guiriec, S., Hadasch, D., Hanabata, Y., Harding, A. K., Hayashi, K., Hayashida, M., Hays, E., Horan, D., Itoh, R., Jóhannesson, G., Johnson, A. S., Johnson, T. J., Khangulyan, D., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuss, M., Lande, J., Latronico, L., Lee, S. H., Lemoine-Goumard, M., Longo, F., Loparco, F., Lubrano, P., Madejski, G. M., Makeev, A., Marelli, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Naumann-Godo, M., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Ormes, J. F., Ozaki, M., Paneque, D., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Pierbattista, M., Piron, F., Porter, T. A., Rainò, S., Rando, R., Ray, P. S., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Romani, R. W., Sadrozinski, H. F. W., Sanchez, D., Parkinson, P. M. S., Scargle, J. D., Schalk, T. L., Sgrò, C., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Suson, D. J., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Troja, E., Uchiyama, Y., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Wang, P., Wood, K. S., Yang, Z., & Ziegler, M. 2011, Gamma-Ray Flares from the Crab Nebula. Science, 331(6018), 739.CrossRefGoogle Scholar
Atoyan, A. & Dermer, C. D. 2004, Synchrotron versus Compton Interpretations for Extended X-Ray Jets. ApJ, 613(1), 151–158.CrossRefGoogle Scholar
Breiding, P., Meyer, E. T., Georganopoulos, M., Keenan, M. E., DeNigris, N. S., & Hewitt, J. 2017, Fermi Non-detections of Four X-Ray Jet Sources and Implications for the IC/CMB Mechanism. ApJ, 849(2), 95.CrossRefGoogle Scholar
Breiding, P., Meyer, E. T., Georganopoulos, M., Reddy, K., Kollmann, K. E., & Roychowdhury, A. 2023, A multiwavelength study of multiple spectral component jets in AGN: testing the IC/CMB model for the large-scale-jet X-ray emission. MNRAS, 518(3), 3222–3250.CrossRefGoogle Scholar
Cara, M., Perlman, E. S., Uchiyama, Y., Cheung, C. C., Coppi, P. S., Georganopoulos, M., Worrall, D. M., Birkinshaw, M., Sparks, W. B., Marshall, H. L., Stawarz, L., Begelman, M. C., O’Dea, C. P., & Baum, S. A. 2013, Polarimetry and the High-energy Emission Mechanisms in Quasar Jets: The Case of PKS 1136-135. ApJ, 773, 186.CrossRefGoogle Scholar
Celotti, A., Ghisellini, G., & Chiaberge, M. 2001, Large-scale jets in active galactic nuclei: multiwavelength mapping. MNRAS, 321(1), L1–L5.CrossRefGoogle Scholar
Chartas, G., Worrall, D. M., Birkinshaw, M., Cresitello-Dittmar, M., Cui, W., Ghosh, K. K., Harris, D. E., Hooper, E. J., Jauncey, D. L., Kim, D. W., Lovell, J., Mathur, S., Schwartz, D. A., Tingay, S. J., Virani, S. N., & Wilkes, B. J. 2000, The Chandra X-Ray Observatory Resolves the X-Ray Morphology and Spectra of a Jet in PKS 0637-752. ApJ, 542(2), 655–666.CrossRefGoogle Scholar
Clautice, D., Perlman, E. S., Georganopoulos, M., Lister, M. L., Tombesi, F., Cara, M., Marshall, H. L., Hogan, B., & Kazanas, D. 2016, The Spectacular Radio-near-IR-X-Ray Jet of 3C 111: The X-Ray Emission Mechanism and Jet Kinematics. ApJ, 826, 109.CrossRefGoogle Scholar
Feigelson, E. D., Schreier, E. J., Delvaille, J. P., Giacconi, R., Grindlay, J. E., & Lightman, A. P. 1981, The X-ray structure of Centaurus A. ApJ, 251, 31–51.CrossRefGoogle Scholar
Georganopoulos, M., Perlman, E. S., Kazanas, D., & McEnery, J. 2006, Quasar X-Ray Jets: Gamma-Ray Diagnostics of the Synchrotron and Inverse Compton Hypotheses: The Case of 3C 273. ApJ Letters, 653(1), L5–L8.CrossRefGoogle Scholar
Giannios, D., Uzdensky, D. A., & Begelman, M. C. 2009, Fast TeV variability in blazars: jets in a jet. MNRAS, 395(1), L29–L33.CrossRefGoogle Scholar
Hardcastle, M. J. & Croston, J. H. 2005, The Chandra view of extended X-ray emission from Pictor A. MNRAS, 363(2), 649–660.CrossRefGoogle Scholar
Hardcastle, M. J., Kraft, R. P., Sivakoff, G. R., Goodger, J. L., Croston, J. H., Jordán, A., Evans, D. A., Worrall, D. M., Birkinshaw, M., Raychaudhury, S., Brassington, N. J., Forman, W. R., Harris, W. E., Jones, C., Juett, A. M., Murray, S. S., Nulsen, P. E. J., Sarazin, C. L., & Woodley, K. A. 2007, New Results on Particle Acceleration in the Centaurus A Jet and Counterjet from a Deep Chandra Observation. ApJ Letters, 670(2), L81–L84.CrossRefGoogle Scholar
Hardcastle, M. J., Lenc, E., Birkinshaw, M., Croston, J. H., Goodger, J. L., Marshall, H. L., Perlman, E. S., Siemiginowska, A., Stawarz, Ł., & Worrall, D. M. 2016, Deep Chandra observations of Pictor A. MNRAS, 455(4), 3526–3545.CrossRefGoogle Scholar
Hardcastle, M. J., Massaro, F., & Harris, D. E. 2010, X-ray emission from the extended emission-line region of the powerful radio galaxy 3C171. MNRAS, 401(4), 2697–2705.CrossRefGoogle Scholar
Hardcastle, M. J., Massaro, F., Harris, D. E., Baum, S. A., Bianchi, S., Chiaberge, M., Morganti, R., O’Dea, C. P., & Siemiginowska, A. 2012, The nature of the jet-driven outflow in the radio galaxy 3C 305. MNRAS, 424(3), 1774–1789.CrossRefGoogle Scholar
Harris, D. E. 2003, X-ray variability and emission process of the radio jet in M87. NewAR, 47(6-7), 617–620.CrossRefGoogle Scholar
Harris, D. E., Biretta, J. A., Junor, W., Perlman, E. S., Sparks, W. B., & Wilson, A. S. 2003, Flaring X-Ray Emission from HST-1, a Knot in the M87 Jet. ApJ Letters, 586(1), L41–L44.CrossRefGoogle Scholar
Harris, D. E. & Krawczynski, H. 2006, X-Ray Emission from Extragalactic Jets. ARA&A, 44(1), 463–506.Google Scholar
Kataoka, J., Stawarz, Ł., Harris, D. E., Siemiginowska, A., Ostrowski, M., Swain, M. R., Hardcastle, M. J., Goodger, J. L., Iwasawa, K., & Edwards, P. G. 2008, Chandra Reveals Twin X-Ray Jets in the Powerful FR II Radio Galaxy 3C 353. ApJ, 685(2), 839–857.Google Scholar
Keenan, M., Meyer, E. T., Georganopoulos, M., Reddy, K., & French, O. J. 2021, The relativistic jet dichotomy and the end of the blazar sequence. MNRAS, 505(4), 4726–4745.CrossRefGoogle Scholar
Kormendy, J. & Ho, L. C. 2013, Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies. ARA&A, 51(1), 511–653.Google Scholar
Kraft, R. P., Forman, W. R., Jones, C., Murray, S. S., Hardcastle, M. J., & Worrall, D. M. 2002, Chandra Observations of the X-Ray Jet in Centaurus A. ApJ, 569(1), 54–71.CrossRefGoogle Scholar
Marscher, A. P. & Jorstad, S. G. 2010, Rapid Variability of Gamma-ray Emission from Sites near the 43 GHz Cores of Blazar Jets. arXiv e-prints, arXiv:1005.5551.Google Scholar
Marshall, H. L., Gelbord, J. M., Worrall, D. M., Birkinshaw, M., Schwartz, D. A., Jauncey, D. L., Griffiths, G., Murphy, D. W., Lovell, J. E. J., Perlman, E. S., & Godfrey, L. 2018, An X-Ray Imaging Survey of Quasar Jets: The Complete Survey. ApJ, 856(1), 66.CrossRefGoogle Scholar
Marshall, H. L., Hardcastle, M. J., Birkinshaw, M., Croston, J., Evans, D., Landt, H., Lenc, E., Massaro, F., Perlman, E. S., Schwartz, D. A., Siemiginowska, A., Stawarz, Ł., Urry, C. M., & Worrall, D. M. 2010, A Flare in the Jet of Pictor A. ApJ Letters, 714(2), L213–L216.CrossRefGoogle Scholar
Meyer, E. T., Breiding, P., Georganopoulos, M., Oteo, I., Zwaan, M. A., Laing, R., Godfrey, L., & Ivison, R. J. 2017, New ALMA and Fermi/LAT Observations of the Large-scale Jet of PKS 0637–752 Strengthen the Case Against the IC/CMB Model. ApJ Letters, 835, L35.CrossRefGoogle Scholar
Meyer, E. T. & Georganopoulos, M. 2014, Fermi Rules Out the Inverse Compton/CMB Model for the Large-scale Jet X-Ray Emission of 3C 273. ApJ Letters, 780, L27.Google Scholar
Meyer, E. T., Georganopoulos, M., Sparks, W. B., Godfrey, L., Lovell, J. E. J., & Perlman, E. 2015, Ruling out IC/CMB X-rays in PKS 0637-752 and the Implications for TeV Emission from Large-scale Quasar Jets. ApJ, 805, 154.CrossRefGoogle Scholar
Meyer, E. T., Petropoulou, M., Georganopoulos, M., Chiaberge, M., Breiding, P., & Sparks, W. B. 2018, Detection of an Optical/UV Jet/Counterjet and Multiple Spectral Components in M84. ApJ, 860(1), 9. CrossRefGoogle Scholar
Migliori, G., Siemiginowska, A., Cheung, C. C., Celotti, A., Giroletti, M., Giovannini, G., Paggi, A., & Liuzzo, E. 2022, Discovery of a bright extended X-ray jet in RGB J1512+020A. MNRAS, 512(3), 4639–4659.CrossRefGoogle Scholar
Mingo, B., Croston, J. H., Hardcastle, M. J., Best, P. N., Duncan, K. J., Morganti, R., Rottgering, H. J. A., Sabater, J., Shimwell, T. W., Williams, W. L., Brienza, M., Gurkan, G., Mahatma, V. H., Morabito, L. K., Prandoni, I., Bondi, M., Ineson, J., & Mooney, S. 2019, Revisiting the Fanaroff-Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS). MNRAS, 488(2), 2701–2721.CrossRefGoogle Scholar
Omodei, N., Petrosian, V., Pesce-Rollins, M., & the Fermi-LAT Collaboration 2013, Fermi-LAT Observation of Impulsive Solar Flares. arXiv e-prints, arXiv:1304.0798.Google Scholar
Petropoulou, M., Vasilopoulos, G., & Giannios, D. 2017, The TeV emission of Ap Librae: a hadronic interpretation and prospects for CTA. MNRAS, 464(2), 2213–2222.CrossRefGoogle Scholar
Reddy, K., Georganopoulos, M., & Meyer, E. T. 2021, X-Ray-to-radio Offset Inference from Low-count X-Ray Jets. ApJS, 253(2), 37.CrossRefGoogle Scholar
Reddy, K., Georganopoulos, M., & Meyer, E. T. 2022, ATLAS-X. ApJS,.Google Scholar
Schwartz, D. A., Marshall, H. L., Lovell, J. E. J., Piner, B. G., Tingay, S. J., Birkinshaw, M., Chartas, G., Elvis, M., Feigelson, E. D., Ghosh, K. K., Harris, D. E., Hirabayashi, H., Hooper, E. J., Jauncey, D. L., Lanzetta, K. M., Mathur, S., Preston, R. A., Tucker, W. H., Virani, S., Wilkes, B., & Worrall, D. M. 2000, Chandra Discovery of a 100 kiloparsec X-Ray Jet in PKS 0637-752. ApJ Letters, 540(2), 69–72.CrossRefGoogle Scholar
Simionescu, A., Stawarz, Ł., Ichinohe, Y., Cheung, C. C., Jamrozy, M., Siemiginowska, A., Hagino, K., Gandhi, P., & Werner, N. 2016, Serendipitous Discovery of an Extended X-Ray Jet without a Radio Counterpart in a High-redshift Quasar. ApJ Letters, 816(1), L15.CrossRefGoogle Scholar
Tavecchio, F., Maraschi, L., Sambruna, R. M., & Urry, C. M. 2000, The X-Ray Jet of PKS 0637-752: Inverse Compton Radiation from the Cosmic Microwave Background? ApJ Letters, 544(1), L23–L26.CrossRefGoogle Scholar
Thimmappa, R., Stawarz, Ł., Marchenko, V., Balasubramaniam, K., Cheung, C. C., & Siemiginowska, A. 2020, Chandra Imaging of the Western Hotspot in the Radio Galaxy Pictor A: Image Deconvolution and Variability Analysis. ApJ, 903(2), 109.CrossRefGoogle Scholar
Wilson, A. S., Young, A. J., & Shopbell, P. L. 2000, Chandra Observations of Cygnus A: Magnetic Field Strengths in the Hot Spots of a Radio Galaxy. ApJ Letters, 544(1), L27–L30.CrossRefGoogle Scholar
Worrall, D. M. 2009, The X-ray jets of active galaxies. AApR, 17, 1–46.Google Scholar