9 research outputs found
Broadband multi-wavelength properties of M87 during the 2017 Event Horizon Telescope campaign
High Energy AstrophysicsInstrumentatio
Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
Abstract: In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109 M ⊙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87’s spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded
Analyzing the factors affecting the flexibility in FMS using weighted interpretive structural modeling (WISM) approach
Model Investigations of Vanadium−Protein Interactions: Novel Vanadium(III) and Oxovanadium(IV) Compounds with the Diamidate Ligand 1,2-Bis(2-pyridinecarboxamide)benzene (H 2
Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
746sireservedIn 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ~6.5 × 109M⊙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87's spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded.mixedAlgaba, J.C. and Anczarski, J. and Asada, K. and Baloković, M. and Chandra, S. and Cui, Y.-Z. and Falcone, A.D. and Giroletti, M. and Goddi, C. and Hada, K. and Haggard, D. and Jorstad, S. and Kaur, A. and Kawashima, T. and Keating, G. and Kim, J.-Y. and Kino, M. and Komossa, S. and Kravchenko, E.V. and Krichbaum, T.P. and Lee, S.-S. and Lu, R.-S. and Lucchini, M. and Markoff, S. and Neilsen, J. and Nowak, M.A. and Park, J. and Principe, G. and Ramakrishnan, V. and Reynolds, M.T. and Sasada, M. and Savchenko, S.S. and Williamson, K.E. and Akiyama, K. and Alberdi, A. and Alef, W. and Anantua, R. and Azulay, R. and Baczko, A.-K. and Ball, D. and Barrett, J. and Bintley, D. and Benson, B.A. and Blackburn, L. and Blundell, R. and Boland, W. and Bouman, K.L. and Bower, G.C. and Boyce, H. and Bremer, M. and Brinkerink, C.D. and Brissenden, R. and Britzen, S. and Broderick, A.E. and Broguiere, D. 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C.; Anczarski, J.; Asada, K.; Baloković, M.; Ch, ; Ra, S.; Cui, Y. -Z.; Falcone, A. D.; Giroletti, M.; Goddi, C.; Hada, K.; Haggard, D.; Jorstad, S.; Kaur, A.; Kawashima, T.; Keating, G.; Kim, J. -Y.; Kino, M.; Komossa, S.; Kravchenko, E. V.; Krichbaum, T. P.; Lee, S. -S.; Lu, R. -S.; Lucchini, M.; Markoff, S.; Neilsen, J.; Nowak, M. A.; Park, J.; Principe, G.; Ramakrishnan, V.; Reynolds, M. T.; Sasada, M.; Savchenko, S. S.; Williamson, K. E.; Akiyama, K.; Alberdi, A.; Alef, W.; Anantua, R.; Azulay, R.; Baczko, A. -K.; Ball, D.; Barrett, J.; Bintley, D.; Benson, B. A.; Blackburn, L.; Blundell, R.; Bol, ; Bouman, K. L.; Bower, G. C.; Boyce, H.; Bremer, M.; Brinkerink, C. D.; Brissenden, R.; Britzen, S.; Broderick, A. E.; Broguiere, D.; Bronzwaer, T.; Byun, D. -Y.; Carlstrom, J. E.; Chael, A.; Chan, C. -K.; Chatterjee, S.; Chatterjee, K.; Chen, M. -T.; Chen, Y.; Chesler, P. M.; Cho, I.; Christian, P.; Conway, J. E.; Cordes, J. M.; Crawford, T. M.; Crew, G. B.; Cruz-Osorio, A.; Davelaar, J.; De Laurentis, M.; Deane, R.; Dempsey, J.; Desvignes, G.; Dexter, J.; Doeleman, S. S.; Eatough, R. P.; Falcke, H.; Farah, J.; Fish, V. L.; Fomalont, E.; Ford, H. A.; Fraga-Encinas, R.; Friberg, P.; Fromm, C. M.; Fuentes, A.; Galison, P.; Gammie, C. F.; García, R.; Gentaz, O.; Georgiev, B.; Gold, R.; Gómez, J. L.; Gómez-Ruiz, A. I.; Gu, M.; Gurwell, M.; Hecht, M. H.; Hesper, R.; Ho, L. C.; Ho, P.; Honma, M.; Huang, C. -W. L.; Huang, L.; Hughes, D. H.; Ikeda, S.; Inoue, M.; Issaoun, S.; James, D. J.; Jannuzi, B. T.; Janssen, M.; Jeter, B.; Jiang, W.; Jiménez-Rosales, A.; Johnson, M. D.; Jung, T.; Karami, M.; Karuppusamy, R.; Kettenis, M.; Kim, D. -J.; Kim, J.; Kim, J.; Koay, J. Y.; Kofuji, Y.; Koch, P. M.; Koyama, S.; Kramer, M.; Kramer, C.; Kuo, C. -Y.; Lauer, T. R.; Levis, A.; Li, Y. -R.; Li, Z.; Lindqvist, M.; Lico, R.; Lindahl, G.; Liu, J.; Liu, K.; Liuzzo, E.; Lo, W. -P.; Lobanov, A. P.; Loinard, L.; Lonsdale, C.; Macdonald, N. R.; Mao, J.; Marchili, N.; Marrone, D. P.; Marscher, A. P.; Martí-Vidal, I.; Matsushita, S.; Matthews, L. D.; Medeiros, L.; Menten, K. M.; Mizuno, I.; Mizuno, Y.; Moran, J. M.; Moriyama, K.; Moscibrodzka, M.; Müller, C.; Musoke, G.; Mejías, A. M.; Nagai, H.; Nagar, N. M.; Nakamura, M.; Narayan, R.; Narayanan, G.; Natarajan, I.; Nathanail, A.; Neri, R.; Ni, C.; Noutsos, A.; Okino, H.; Olivares, H.; Ortiz-León, G. N.; Oyama, T.; Ozel, F.; Palumbo, D. C. M.; Patel, N.; Pen, U. -L.; Pesce, D. W.; Piétu, V.; Plambeck, R.; Popstefanija, A.; Porth, O.; Pötzl, F. M.; Prather, B.; Preciado-López, J. A.; Psaltis, D.; Pu, H. -Y.; Rao, R.; Rawlings, M. G.; Raymond, A. W.; Rezzolla, L.; Ricarte, A.; Ripperda, B.; Roelofs, F.; Rogers, A.; Ros, E.; Rose, M.; Roshanineshat, A.; Rottmann, H.; Roy, A. L.; Ruszczyk, C.; Rygl, K. L. J.; Sánchez, S.; Sánchez-Arguelles, D.; Savolainen, T.; Schloerb, F. P.; Schuster, K. -F.; Shao, L.; Shen, Z.; Small, D.; Sohn, B. W.; Soohoo, J.; Sun, H.; Tazaki, F.; Tetarenko, A. J.; Tiede, P.; Tilanus, R. P. J.; Titus, M.; Toma, K.; Torne, P.; Trent, T.; Traianou, E.; Trippe, S.; Van Bemmel, I.; Van Langevelde, H. J.; Van Rossum, D. R.; Wagner, J.; Ward-Thompson, D.; Wardle, J.; Weintroub, J.; Wex, N.; Wharton, R.; Wielgus, M.; Wong, G. N.; Wu, Q.; Yoon, D.; Young, A.; Young, K.; Younsi, Z.; Yuan, F.; Yuan, Y. -F.; Zensus, J. A.; Zhao, G. -Y.; Zhao, S. -S.; Principe, G.; Giroletti, M.; D'Amm, ; O, F.; Orienti, M.; Abdalla, H.; Adam, R.; Aharonian, F.; Benkhali, F. A.; Angüner, E. O.; Arcaro, C.; Arm, ; Armstrong, T.; Ashkar, H.; Backes, M.; Baghmanyan, V.; Barbosa Martins, V.; Barnacka, A.; Barnard, M.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Bi, B.; Böttcher, M.; Boisson, C.; Bolmont, J.; De Bony De Lavergne, M.; Breuhaus, M.; Brun, F.; Brun, P.; Bryan, M.; Büchele, M.; Bulik, T.; Bylund, T.; Caroff, S.; Carosi, A.; Casanova, S.; Ch, ; Chen, A.; Cotter, G.; Curyło, M.; Damascene Mbarubucyeye, J.; Davids, I. D.; Davies, J.; Deil, C.; Devin, J.; Dewilt, P.; Dirson, L.; Djannati-Ataï, A.; Dmytriiev, A.; Donath, A.; Doroshenko, V.; Duffy, C.; Dyks, J.; Egberts, K.; Eichhorn, F.; Einecke, S.; Emery, G.; Ernenwein, J. -P.; Feijen, K.; Fegan, S.; Fiasson, A.; De Clairfontaine, G. F.; Fontaine, G.; Funk, S.; Füßling, M.; Gabici, S.; Gallant, Y. A.; Giavitto, G.; Giunti, L.; Glawion, D.; Glicenstein, J. F.; Gottschall, D.; Grondin, M. -H.; Hahn, J.; Haupt, M.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Hörbe, M.; Horns, D.; Huber, D.; Jamrozy, M.; Jankowsky, D.; Jankowsky, F.; Jardin-Blicq, A.; Joshi, V.; Jung-Richardt, I.; Kasai, E.; Kastendieck, M. 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