Personer

Kaj Johannes Wiik

Research Fellow

T411 Dept. Electronics and Nanoeng

Full researcher profile

https://research.aalto.fi/...

E-post

kaj.wiik@aalto.fi

Forskningsgrupp

Anne Lähteenmäki Group, Research Fellow

Publikationer

The persistent shadow of the supermassive black hole of M87: II. Model comparisons and theoretical interpretations

Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Geoffrey B. Crew, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

Origin of the ring ellipticity in the black hole images of M87

Rohan Dahale, Ilje Cho, Kotaro Moriyama, Kaj Wiik, Paul Tiede, José L. Gómez, Chi Kwan Chan, Roman Gold, Vadim Y. Bernshteyn, Marianna Foschi, Britton Jeter, Hung Yi Pu, Boris Georgiev, Abhishek V. Joshi, Alejandro Cruz-Osorio, Iniyan Natarajan, Avery E. Broderick, León D.S. Salas, Koushik Chatterjee, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Douglas Ferreira Carlos, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington 2025 Astronomy & Astrophysics

First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA

Ciriaco Goddi, Douglas F. Carlos, Geoffrey B. Crew, Lynn D. Matthews, Hugo Messias, Alejandro Mus, Iván Martí-Vidal, Ezequiel Albentosa-Ruíz, Mariafelicia De Laurentis, Elisabetta Liuzzo, Nicola Marchili, Kazi L.J. Rygl, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Balokoviä, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

A multifrequency study of sub-parsec jets with the Event Horizon Telescope

Jan Röder, Maciek Wielgus, Andrei P. Lobanov, Thomas P. Krichbaum, Dhanya G. Nair, Sang Sung Lee, Eduardo Ros, Vincent L. Fish, Lindy Blackburn, Chi Kwan Chan, Sara Issaoun, Michael Janssen, Michael D. Johnson, Sheperd S. Doeleman, Geoffrey C. Bower, Geoffrey B. Crew, Remo P.J. Tilanus, Tuomas Savolainen, C. M. Violette Impellizzeri, Antxon Alberdi, Anne Kathrin Baczko, José L. Gómez, Ru Sen Lu, Georgios F. Paraschos, Efthalia Traianou, Ciriaco Goddi, Daewon Kim, Mikhail Lisakov, Yuri Y. Kovalev, Petr A. Voitsik, Kirill V. Sokolovsky, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Jan Wagner, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

First Sagittarius A∗ Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington, Kaj Wiik 2024 Astrophysical Journal Letters

First Sagittarius A∗ Event Horizon Telescope Results. VII. Polarization of the Ring

Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Jasmin E. Washington, Kaj Wiik 2024 Astrophysical Journal Letters

The persistent shadow of the supermassive black hole of M 87: I. Observations, calibration, imaging, and analysis*

Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Rohan Dahale, Jordy Davelaar, Venkatessh Ramakrishnan, Tuomas Savolainen, Kaj Wiik 2024 Astronomy & Astrophysics

Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode

J. C. Algaba, M. Baloković, S. Chandra, W. Y. Cheong, Y. Z. Cui, F. D'Ammando, A. D. Falcone, N. M. Ford, M. Giroletti, C. Goddi, M. A. Gurwell, K. Hada, D. Haggard, S. Jorstad, A. Kaur, T. Kawashima, S. Kerby, J. Y. Kim, M. Kino, E. V. Kravchenko, S. S. Lee, R. S. Lu, S. Markoff, J. Michail, J. Neilsen, M. A. Nowak, G. Principe, V. Ramakrishnan, B. Ripperda, M. Sasada, S. S. Savchenko, C. Sheridan, K. Akiyama, A. Alberdi, W. Alef, R. Anantua, K. Asada, R. Azulay, U. Bach, A. K. Baczko, D. Ball, B. Bandyopadhyay, J. Barrett, M. Bauböck, T. Savolainen, J. E. Washington, K. Wiik, J. Jormanainen, P. M. Kouch, S. Suutarinen 2024 Astronomy & Astrophysics

The putative center in NGC 1052

Anne Kathrin Baczko, Matthias Kadler, Eduardo Ros, Christian M. Fromm, MacIek Wielgus, Manel Perucho, Thomas P. Krichbaum, Mislav Baloković, Lindy Blackburn, Chi Kwan Chan, Sara Issaoun, Michael Janssen, Luca Ricci, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, David Ball, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Dominic O. Chang, Koushik Chatterjee, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Kaj Wiik 2024 Astronomy & Astrophysics

Ordered magnetic fields around the 3C 84 central black hole

G. F. Paraschos, J. Y. Kim, M. Wielgus, J. Röder, T. P. Krichbaum, E. Ros, I. Agudo, I. Myserlis, M. Moscibrodzka, E. Traianou, J. A. Zensus, L. Blackburn, C. K. Chan, S. Issaoun, M. Janssen, M. D. Johnson, V. L. Fish, K. Akiyama, A. Alberdi, W. Alef, J. C. Algaba, R. Anantua, K. Asada, R. Azulay, U. Bach, A. K. Baczko, D. Ball, M. Baloković, J. Barrett, M. Bauböck, B. A. Benson, D. Bintley, R. Blundell, K. L. Bouman, G. C. Bower, H. Boyce, M. Bremer, C. D. Brinkerink, R. Brissenden, S. Britzen, A. E. Broderick, D. Broguiere, T. Bronzwaer, S. Bustamante, D. Y. Byun, J. E. Carlstrom, C. Ceccobello, A. Chael, D. O. Chang, K. Chatterjee, S. Chatterjee, M. T. Chen, Y. Chen, X. Cheng, I. Cho, P. Christian, N. S. Conroy, J. E. Conway, J. M. Cordes, T. M. Crawford, G. B. Crew, A. Cruz-Osorio, Y. Cui, R. Dahale, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, V. Dhruv, S. S. Doeleman, S. Dougal, S. A. Dzib, R. P. Eatough, R. Emami, H. Falcke, J. Farah, E. Fomalont, H. A. Ford, M. Foschi, R. Fraga-Encinas, W. T. Freeman, P. Friberg, C. M. Fromm, A. Fuentes, P. Galison, C. F. Gammie, R. García, O. Gentaz, B. Georgiev, C. Goddi, R. Gold, A. I. Gómez-Ruiz, J. L. Gómez, M. Gu, M. Gurwell, K. Hada, D. Haggard, K. Haworth, M. H. Hecht, R. Hesper, D. Heumann, L. C. Ho, P. Ho, M. Honma, C. L. Huang, L. Huang, D. H. Hughes, S. Ikeda, C. M.V. Impellizzeri, M. Inoue, D. J. James, B. T. Jannuzi, B. Jeter, W. Jaing, A. Jiménez-Rosales, S. Jorstad, A. V. Joshi, T. Jung, M. Karami, R. Karuppusamy, T. Kawashima, G. K. Keating, M. Kettenis, D. J. Kim, J. Kim, J. Kim, M. Kino, J. Y. Koay, P. Kocherlakota, Y. Kofuji, P. M. Koch, S. Koyama, C. Kramer, J. A. Kramer, M. Kramer, C. Y. Kuo, N. La Bella, T. R. Lauer, D. Lee, S. S. Lee, P. K. Leung, A. Levis, Z. Li, R. Lico, G. Lindahl, M. Lindqvist, M. Lisakov, J. Liu, K. Liu, E. Liuzzo, W. P. Lo, A. P. Lobanov, L. Loinard, C. J. Lonsdale, A. E. Lowitz, R. S. Lu, N. R. MacDonald, J. Mao, N. Marchili, S. Markoff, D. P. Marrone, A. P. Marscher, I. Martí-Vidal, S. Matsushita, L. D. Matthews, L. Medeiros, K. M. Menten, D. Michalik, I. Mizuno, Y. Mizuno, J. M. Moran, K. Moriyama, W. Mulaudzi, C. Müller, H. Müller, A. Mus, G. Musoke, A. Nadolski, H. Nagai, N. M. Nagar, M. Nakamura, G. Narayanan, I. Natarajan, A. Nathanail, S. Navarro Fuentes, J. Neilsen, R. Neri, C. Ni, A. Noutsos, M. A. Nowak, J. Oh, H. Okino, H. Olivares, G. N. Ortiz-León, T. Oyama, F. ÖZel, D. C.M. Palumbo, J. Park, H. Parsons, N. Patel, U. L. Pen, V. Piétu, R. Plambeck, A. Popstefanija, O. Porth, F. M. Pötzl, B. Prather, J. A. Preciado-López, D. Psaltis, H. Y. Pu, V. Ramakrishnan, R. Rao, M. G. Rawlings, A. W. Raymond, L. Rezzolla, A. Ricarte, B. Ripperda, F. Roelofs, A. Rogers, C. Romero-Cañizales, A. Roshanineshat, H. Rottmann, A. L. Roy, I. Ruiz, C. Ruszczyk, K. L.J. Rygl, S. Sánchez, D. Sánchez-Argüelles, M. Sánchez-Portal, M. Sasada, K. Satapathy, T. Savolainen, F. P. Schloerb, J. Schonfeld, K. Schuster, L. Shao, Z. Shen, D. Small, B. W. Sohn, J. Soohoo, L. D. Sosapanta Salas, K. Souccar, H. Sun, F. Tazaki, A. J. Tetarenko, P. Tiede, R. P.J. Tilanus, M. Titus, P. Torne, T. Toscano, T. Trent, S. Trippe, M. Turk, I. Van Bemmel, H. J. Van Langevelde, D. R. Van Rossum, J. Vos, J. Wagner, D. Ward-Thompson, J. Wardle, J. E. Washington, J. Weintroub, R. Wharton, K. Wiik, G. Witzel, M. F. Wondrak, G. N. Wong, Q. Wu, N. Yadlapalli, P. Yamaguchi, A. Yfantis, D. Yoon, A. Young, K. Young, Z. Younsi, W. Yu, F. Yuan, Y. F. Yuan, S. Zhang, G. Y. Zhao, S. S. Zhao 2024 Astronomy & Astrophysics