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Johnson, Michael

Astrophysicist

selected publications

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    • Raymond, Alexander W., Palumbo, Daniel, Paine, Scott N., Blackburn, Lindy, Córdova Rosado, Rodrigo, Doeleman, Sheperd S., Farah, Joseph R., Johnson, Michael D., Roelofs, Freek, Tilanus, Remo P. J., and Weintroub, Jonathan. 2021. "Evaluation of New Submillimeter VLBI Sites for the Event Horizon Telescope." The Astrophysical Journal Supplement Series 253:5. https://doi.org/10.3847/1538-3881/abc3c3 2021
    • Event Horizon Telescope Collaboration, Akiyama, Kazunori, Algaba, Juan Carlos, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E. et al. 2021. "First M87 Event Horizon Telescope Results. VII. Polarization of the Ring." The Astrophysical Journal 910:L12. https://doi.org/10.3847/2041-8213/abe71d 2021
    • Event Horizon Telescope Collaboration, Akiyama, Kazunori, Algaba, Juan Carlos, Alberdi, Antxon, Alef, Walter, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E. et al. 2021. "First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon." The Astrophysical Journal 910:L13. https://doi.org/10.3847/2041-8213/abe4de 2021
    • Hadar, Shahar, Johnson, Michael D., Lupsasca, Alexandru, and Wong, George N. 2021. "Photon ring autocorrelations." Physical Review D 103:104038. https://doi.org/10.1103/PhysRevD.103.104038 2021
    • Goddi, Ciriaco, Martí-Vidal, Iván, Messias, Hugo, Bower, Geoffrey C., Broderick, Avery E., Dexter, Jason, Marrone, Daniel P., Moscibrodzka, Monika, Nagai, Hiroshi, Algaba, Juan Carlos, Asada, Keiichi, Crew, Geoffrey B., Gómez, José L., Impellizzeri, C. M. Violette, Janssen, Michael, Kadler, Matthias, Krichbaum, Thomas P., Lico, Rocco, Matthews, Lynn D., Nathanail, Antonios, Ricarte, Angelo, Ros, Eduardo, Younsi, Ziri, Akiyama, Kazunori, Alberdi, Antxon et al. 2021. "Polarimetric Properties of Event Horizon Telescope Targets from ALMA." The Astrophysical Journal 910:L14. https://doi.org/10.3847/2041-8213/abee6a 2021
    • Gelles, Zachary, Prather, B. S., Palumbo, Daniel C. M., Johnson, Michael D., Wong, G. N., and Georgiev, B. 2021. "The Role of Adaptive Ray Tracing in Analyzing Black Hole Structure." The Astrophysical Journal 912:39. https://doi.org/10.3847/1538-4357/abee13 2021
    • Blackburn, Lindy, Pesce, Dominic W., Johnson, Michael D., Wielgus, Maciek, Chael, Andrew A., Christian, Pierre, and Doeleman, Sheperd S. 2020. "Closure Statistics in Interferometric Data." The Astrophysical Journal 894:31. https://doi.org/10.3847/1538-4357/ab8469 2020
    • Ricarte, Angelo, Prather, Ben S., Wong, George N., Narayan, Ramesh, Gammie, Charles, and Johnson, Michael D. 2020. "Decomposing the internal faraday rotation of black hole accretion flows." Monthly Notices of the Royal Astronomical Society 498:5468-5488. https://doi.org/10.1093/mnras/staa2692 2020
    • Kim, Jae-Young, Krichbaum, Thomas P., Broderick, Avery E., Wielgus, Maciek, Blackburn, Lindy, Gómez, José L., Johnson, Michael D., Bouman, Katherine L., Chael, Andrew, Akiyama, Kazunori, Jorstad, Svetlana, Marscher, Alan P., Issaoun, Sara, Janssen, Michael, Chan, Chi-kwan, Savolainen, Tuomas, Pesce, Dominic W., Özel, Feryal, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Ball, David, Baloković, Mislav et al. 2020. "Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution." Astronomy and Astrophysics 640:A69. https://doi.org/10.1051/0004-6361/202037493 2020
    • Psaltis, Dimitrios, Medeiros, Lia, Christian, Pierre, Özel, Feryal, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Ball, David, Balokovic, Mislav, Barrett, John, Bintley, Dan, Blackburn, Lindy, Boland, Wilfred, Bower, Geoffrey C., Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broguiere, Dominique, Bronzwaer, Thomas, Byun, Do-Young, Carlstrom, John E., Chael, Andrew et al. 2020. "Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole." Physical Review Letters 125:141104. https://doi.org/10.1103/PhysRevLett.125.141104 2020
    • Wielgus, Maciek, Akiyama, Kazunori, Blackburn, Lindy, Chan, Chi-kwan, Dexter, Jason, Doeleman, Sheperd S., Fish, Vincent L., Issaoun, Sara, Johnson, Michael D., Krichbaum, Thomas P., Lu, Ru-Sen, Pesce, Dominic W., Wong, George N., Bower, Geoffrey C., Broderick, Avery E., Chael, Andrew, Chatterjee, Koushik, Gammie, Charles F., Georgiev, Boris, Hada, Kazuhiro, Loinard, Laurent, Markoff, Sera, Marrone, Daniel P., Plambeck, Richard, Weintroub, Jonathan et al. 2020. "Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope." The Astrophysical Journal 901:67. https://doi.org/10.3847/1538-4357/abac0d 2020
    • Farah, Joseph R., Pesce, Dominic W., Johnson, Michael D., and Blackburn, Lindy. 2020. "On the Approximation of the Black Hole Shadow with a Simple Polar Curve." The Astrophysical Journal 900:77. https://doi.org/10.3847/1538-4357/aba59a 2020
    • Broderick, Avery E., Gold, Roman, Karami, Mansour, Preciado-López, Jorge A., Tiede, Paul, Pu, Hung-Yi, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Baloković, Mislav, Barrett, John, Bintley, Dan, Blackburn, Lindy, Boland, Wilfred, Bouman, Katherine L., Bower, Geoffrey C., Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broguiere, Dominique, Bronzwaer, Thomas et al. 2020. "THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope." The Astrophysical Journal 897:139. https://doi.org/10.3847/1538-4357/ab91a4 2020
    • Johnson, Michael D., Lupsasca, Alexandru, Strominger, Andrew, Wong, George N., Hadar, Shahar, Kapec, Daniel, Narayan, Ramesh, Chael, Andrew, Gammie, Charles F., Galison, Peter, Palumbo, Daniel C. M., Doeleman, Sheperd S., Blackburn, Lindy, Wielgus, Maciek, Pesce, Dominic W., Farah, Joseph R., and Moran, James M. 2020. "Universal interferometric signatures of a black hole's photon ring." Science Advances 6:eaaz1310. https://doi.org/10.1126/sciadv.aaz1310 2020
    • Himwich, Elizabeth, Johnson, Michael D., Lupsasca, Alexandru, and Strominger, Andrew. 2020. "Universal polarimetric signatures of the black hole photon ring." Physical Review D 101:084020. https://doi.org/10.1103/PhysRevD.101.084020 2020
    • Gold, Roman, Broderick, Avery E., Younsi, Ziri, Fromm, Christian M., Gammie, Charles F., Mościbrodzka, Monika, Pu, Hung-Yi, Bronzwaer, Thomas, Davelaar, Jordy, Dexter, Jason, Ball, David, Chan, Chi-kwan, Kawashima, Tomohisa, Mizuno, Yosuke, Ripperda, Bart, Akiyama, Kazunori, Alberdi, Antxon, Alef, Walter, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne-Kathrin, Baloković, Mislav, Barrett, John, Bintley, Dan, Blackburn, Lindy et al. 2020. "Verification of Radiative Transfer Schemes for the EHT." The Astrophysical Journal 897:148. https://doi.org/10.3847/1538-4357/ab96c6 2020
    • Alexander, Kate D., Laskar, T., Berger, Edo, Johnson, Michael D., Williams, Peter K. G., Dichiara, S., Fong, W., Gomboc, A., Kobayashi, S., Margutti, R., and Mundell, C. G. 2019. "An Unexpectedly Small Emission Region Size Inferred from Strong High-frequency Diffractive Scintillation in GRB 161219B." The Astrophysical Journal 870:67. https://doi.org/10.3847/1538-4357/aaf19d 2019
    • Liu, Kuo, Young, André, Wharton, Robert, Blackburn, Lindy, Cappallo, Roger, Chatterjee, Shami, Cordes, James M., Crew, Geoffrey B., Desvignes, Gregory, Doeleman, Sheperd S., Eatough, Ralph P., Falcke, Heino, Goddi, Ciriaco, Johnson, Michael D., Johnston, Simon, Karuppusamy, Ramesh, Kramer, Michael, Matthews, Lynn D., Ransom, Scott M., Rezzolla, Luciano, Rottmann, Helge, Tilanus, Remo P. J., and Torne, Pablo. 2019. "Detection of Pulses from the Vela Pulsar at Millimeter Wavelengths with Phased ALMA." The Astrophysical Journal 885:L10. https://doi.org/10.3847/2041-8213/ab4da8 2019
    • Blackburn, Lindy, Chan, Chi-kwan, Crew, Geoffrey B., Fish, Vincent L., Issaoun, Sara, Johnson, Michael D., Wielgus, Maciek, Akiyama, Kazunori, Barrett, John, Bouman, Katherine L., Cappallo, Roger, Chael, Andrew A., Janssen, Michael, Lonsdale, Colin J., and Doeleman, Sheperd S. 2019. "EHT-HOPS Pipeline for Millimeter VLBI Data Reduction." The Astrophysical Journal 882:23. https://doi.org/10.3847/1538-4357/ab328d 2019
    • Palumbo, Daniel C. M., Doeleman, Sheperd S., Johnson, Michael D., Bouman, Katherine L., and Chael, Andrew A. 2019. "Metrics and Motivations for Earth-Space VLBI: Time-resolving Sgr A* with the Event Horizon Telescope." The Astrophysical Journal 881:62. https://doi.org/10.3847/1538-4357/ab2bed 2019
    • Gill, Ajay, Blackburn, Lindy, Roshanineshat, Arash, Chan, Chi-kwan, Doeleman, Sheperd S., Johnson, Michael D., Raymond, Alexander W., and Weintroub, Jonathan. 2019. "Prospects for Wideband VLBI Correlation in the Cloud." Publications of the Astronomical Society of the Pacific 131:124501. https://doi.org/10.1088/1538-3873/ab32a8 2019
    • Zhu, Ziyan, Johnson, Michael D., and Narayan, Ramesh. 2019. "Testing General Relativity with the Black Hole Shadow Size and Asymmetry of Sagittarius A*: Limitations from Interstellar Scattering." The Astrophysical Journal 870:6. https://doi.org/10.3847/1538-4357/aaef3d 2019
    • Porth, Oliver, Chatterjee, Koushik, Narayan, Ramesh, Gammie, Charles F., Mizuno, Yosuke, Anninos, Peter, Baker, John G., Bugli, Matteo, Chan, Chi-kwan, Davelaar, Jordy, Del Zanna, Luca, Etienne, Zachariah B., Fragile, P. Chris, Kelly, Bernard J., Liska, Matthew, Markoff, Sera, McKinney, Jonathan C., Mishra, Bhupendra, Noble, Scott C., Olivares, Héctor, Prather, Ben, Rezzolla, Luciano, Ryan, Benjamin R., Stone, James M., Tomei, Niccolò et al. 2019. "The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project." The Astrophysical Journal Supplement Series 243:26. https://doi.org/10.3847/1538-4365/ab29fd 2019
    • Narayan, Ramesh, Johnson, Michael D., and Gammie, Charles F. 2019. "The Shadow of a Spherically Accreting Black Hole." The Astrophysical Journal 885:L33. https://doi.org/10.3847/2041-8213/ab518c 2019
    • Issaoun, Sara, Johnson, Michael D., Blackburn, Lindy, Brinkerink, C. D., Mościbrodzka, M., Chael, Andrew, Goddi, C., Martí-Vidal, I., Wagner, J., Doeleman, Sheperd S., Falcke, H., Krichbaum, T. P., Akiyama, K., Bach, U., Bouman, Katherine L., Bower, G. C., Broderick, A., Cho, I., Crew, G., Dexter, J., Fish, V., Gold, R., Gómez, J. L., Hada, K., Hernández-Gómez, A. et al. 2019. "The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA." The Astrophysical Journal 871:30. https://doi.org/10.3847/1538-4357/aaf732 2019
    • Chael, Andrew, Narayan, Ramesh, and Johnson, Michael D. 2019. "Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87." Monthly Notices of the Royal Astronomical Society 486:2873-2895. https://doi.org/10.1093/mnras/stz988 2019
    • Issaoun, Sara, Johnson, Michael D., Blackburn, Lindy, Mościbrodzka, M., Chael, Andrew, and Falcke, H. 2019. "VLBI imaging of black holes via second moment regularization." Astronomy and Astrophysics 629:A32. https://doi.org/10.1051/0004-6361/201936156 2019
    • Bower, Geoffrey C., Broderick, Avery, Dexter, Jason, Doeleman, Shepherd, Falcke, Heino, Fish, Vincent, Johnson, Michael D., Marrone, Daniel P., Moran, James M., Moscibrodzka, Monika, Peck, Alison, Plambeck, Richard L., and Rao, Ramprasad. 2018. "ALMA Polarimetry of Sgr A*: Probing the Accretion Flow from the Event Horizon to the Bondi Radius." The Astrophysical Journal 868:101. https://doi.org/10.3847/1538-4357/aae983 2018
    • Lu, Ru-Sen, Krichbaum, Thomas P., Roy, Alan L., Fish, Vincent L., Doeleman, Sheperd S., Johnson, Michael D., Akiyama, Kazunori, Psaltis, Dimitrios, Alef, Walter, Asada, Keiichi, Beaudoin, Christopher, Bertarini, Alessandra, Blackburn, Lindy, Blundell, Ray, Bower, Geoffrey C., Brinkerink, Christiaan, Broderick, Avery E., Cappallo, Roger, Crew, Geoffrey B., Dexter, Jason, Dexter, Matt, Falcke, Heino, Freund, Robert, Friberg, Per, Greer, Christopher H. et al. 2018. "Detection of Intrinsic Source Structure at ~3 Schwarzschild Radii with Millimeter-VLBI Observations of SAGITTARIUS A*." The Astrophysical Journal 859:60. https://doi.org/10.3847/1538-4357/aabe2e 2018
    • Chael, Andrew A., Johnson, Michael D., Bouman, Katherine L., Blackburn, Lindy L., Akiyama, Kazunori, and Narayan, Ramesh. 2018. "Interferometric Imaging Directly with Closure Phases and Closure Amplitudes." The Astrophysical Journal 857:23. https://doi.org/10.3847/1538-4357/aab6a8 2018
    • Johnson, Michael D., Narayan, Ramesh, Psaltis, Dimitrios, Blackburn, Lindy, Kovalev, Yuri Y., Gwinn, Carl R., Zhao, Guang-Yao, Bower, Geoffrey C., Moran, James M., Kino, Motoki, Kramer, Michael, Akiyama, Kazunori, Dexter, Jason, Broderick, Avery E., and Sironi, Lorenzo. 2018. "The Scattering and Intrinsic Structure of Sagittarius A* at Radio Wavelengths." The Astrophysical Journal 865:104. https://doi.org/10.3847/1538-4357/aadcff 2018
    • Chael, Andrew, Rowan, Michael, Narayan, Ramesh, Johnson, Michael, and Sironi, Lorenzo. 2018. "The role of electron heating physics in images and variability of the Galactic Centre black hole Sagittarius A*." Monthly Notices of the Royal Astronomical Society 478:5209-5229. https://doi.org/10.1093/mnras/sty1261 2018
    • Johnson, Michael D., Bouman, Katherine L., Blackburn, Lindy, Chael, Andrew A., Rosen, Julian, Shiokawa, Hotaka, Roelofs, Freek, Akiyama, Kazunori, Fish, Vincent L., and Doeleman, Sheperd S. 2017. "Dynamical Imaging with Interferometry." The Astrophysical Journal 850:172. https://doi.org/10.3847/1538-4357/aa97dd 2017
    • Gold, Roman, McKinney, Jonathan C., Johnson, Michael D., and Doeleman, Sheperd S. 2017. "Probing the Magnetic Field Structure in Sgr A* on Black Hole Horizon Scales with Polarized Radiative Transfer Simulations." The Astrophysical Journal 837:180. https://doi.org/10.3847/1538-4357/aa6193 2017
    • Roelofs, Freek, Johnson, Michael D., Shiokawa, Hotaka, Doeleman, Sheperd S., and Falcke, Heino. 2017. "Quantifying Intrinsic Variability of Sagittarius A* Using Closure Phase Measurements of the Event Horizon Telescope." The Astrophysical Journal 847:55. https://doi.org/10.3847/1538-4357/aa8455 2017
    • Chael, Andrew A., Johnson, Michael D., Narayan, Ramesh, Doeleman, Sheperd S., Wardle, John F. C., and Bouman, Katherine L. 2016. "High-resolution Linear Polarimetric Imaging for the Event Horizon Telescope." The Astrophysical Journal 829:11. https://doi.org/10.3847/0004-637X/829/1/11 2016
    • Broderick, Avery E., Fish, Vincent L., Johnson, Michael D., Rosenfeld, Katherine, Wang, Carlos, Doeleman, Sheperd S., Akiyama, Kazunori, Johannsen, Tim, and Roy, Alan L. 2016. "Modeling Seven Years of Event Horizon Telescope Observations with Radiatively Inefficient Accretion Flow Models." The Astrophysical Journal 820:137. https://doi.org/10.3847/0004-637X/820/2/137 2016
    • Fish, Vincent L., Johnson, Michael D., Doeleman, Sheperd S., Broderick, Avery E., Psaltis, Dimitrios, Lu, Ru-Sen, Akiyama, Kazunori, Alef, Walter, Algaba, Juan Carlos, Asada, Keiichi, Beaudoin, Christopher, Bertarini, Alessandra, Blackburn, Lindy, Blundell, Ray, Bower, Geoffrey C., Brinkerink, Christiaan, Cappallo, Roger, Chael, Andrew A., Chamberlin, Richard, Chan, Chi-kwan, Crew, Geoffrey B., Dexter, Jason, Dexter, Matt, Dzib, Sergio A., Falcke, Heino et al. 2016. "Persistent Asymmetric Structure of Sagittarius A* on Event Horizon Scales." The Astrophysical Journal 820:90. https://doi.org/10.3847/0004-637X/820/2/90 2016
    • Johannsen, Tim, Broderick, Avery E., Plewa, Philipp M., Chatzopoulos, Sotiris, Doeleman, Sheperd S., Eisenhauer, Frank, Fish, Vincent L., Genzel, Reinhard, Gerhard, Ortwin, and Johnson, Michael D. 2016. "Testing General Relativity with the Shadow Size of Sgr A*." Physical Review Letters 116:031101. https://doi.org/10.1103/PhysRevLett.116.031101 2016
    • Akiyama, Kazunori, Lu, Ru-Sen, Fish, Vincent L., Doeleman, Sheperd S., Broderick, Avery E., Dexter, Jason, Hada, Kazuhiro, Kino, Motoki, Nagai, Hiroshi, Honma, Mareki, Johnson, Michael D., Algaba, Juan C., Asada, Keiichi, Brinkerink, Christiaan, Blundell, Ray, Bower, Geoffrey C., Cappallo, Roger, Crew, Geoffrey B., Dexter, Matt, Dzib, Sergio A., Freund, Robert, Friberg, Per, Gurwell, Mark, Ho, Paul T. P., Inoue, Makoto et al. 2015. "230 GHz VLBI Observations of M87: Event-horizon-scale Structure during an Enhanced Very-high- energy -Ray State in 2012." The Astrophysical Journal 807:150. https://doi.org/10.1088/0004-637X/807/2/150 2015
    • Johnson, Michael D., Loeb, Abraham, Shiokawa, Hotaka, Chael, Andrew A., and Doeleman, Sheperd S. 2015. "Measuring the Direction and Angular Velocity of a Black Hole Accretion Disk via Lagged Interferometric Covariance." The Astrophysical Journal 813:132. https://doi.org/10.1088/0004-637X/813/2/132 2015
    • Johnson, Michael D., Fish, Vincent L., Doeleman, Sheperd S., Marrone, Daniel P., Plambeck, Richard L., Wardle, John F. C., Akiyama, Kazunori, Asada, Keiichi, Beaudoin, Christopher, Blackburn, Lindy, Blundell, Ray, Bower, Geoffrey C., Brinkerink, Christiaan, Broderick, Avery E., Cappallo, Roger, Chael, Andrew A., Crew, Geoffrey B., Dexter, Jason, Dexter, Matt, Freund, Robert, Friberg, Per, Gold, Roman, Gurwell, Mark A., Ho, Paul T. P., Honma, Mareki et al. 2015. "Resolved magnetic-field structure and variability near the event horizon of Sagittarius A*." Science 350:1242-1245. https://doi.org/10.1126/science.aac7087 2015
    • Johnson, Michael D., Fish, Vincent L., Doeleman, Sheperd S., Broderick, Avery E., Wardle, John F. C., and Marrone, Daniel P. 2014. "Relative Astrometry of Compact Flaring Structures in Sgr A* with Polarimetric Very Long Baseline Interferometry." The Astrophysical Journal 794:150. https://doi.org/10.1088/0004-637X/794/2/150 2014