Scientific Publications

2024

The relationship between simulated sub-millimeter and near-infrared images of Sagittarius A* from a magnetically arrested black hole accretion flow
Grigorian A.A., and J. Dexter, Monthly Notices Of The Royal Astronomical Society 530, 1563-1579 (2024).
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Ordered magnetic fields around the 3C 84 central black hole
Paraschos G., J.-Y. Kim, M. Wielgus, J. Dexter, and et. al, Astronomy & Astrophysics 682, "L3" (2024).
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A dynamical measure of the black hole mass in a quasar 11 billion years ago
Abuter R., F. Allouche, J. Dexter, and et. al, Nature (2024).
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The persistent shadow of the supermassive black hole of M 87 - I. Observations, calibration, imaging, and analysis⋆
Collaboration T., K. Akiyama, A. Alberdi, J. Dexter, and et. al, A&A 681, "A79" (2024).
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Broad-line region geometry from multiple emission lines in a single-epoch spectrum
Kuhn L., J. Shangguan, R. Davies, A. Man, Y. Cao, J. Dexter, F. Eisenhauer, N.M.F. Schreiber, H. Feuchtgruber, R. Genzel, and S. Gillessen, Astronomy & Astrophysics (2024).
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Combining Gaia and GRAVITY: Characterising Five New Directly Detected Substellar Companions
Winterhalder T., S. Lacour, J. Dexter, and et. al, Submitted (2024).
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2023

A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set
Torne P., K. Liu, J. Dexter, and et. al, The Astrophysical Journal 959, 14 (2023).
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The Event Horizon Telescope Image of the Quasar NRAO 530
Jorstad S., J. Dexter, and et. al, The Astrophysical Journal 943, 170 (2023).
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Polarization analysis of the VLTI and GRAVITY
Widmann F., H. Schuhler, J. Dexter, and et. al, Astronomy & Astrophysics 681, A115 (2023).
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Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes
Roelofs F., M. Johnson, J. Dexter, and et. al, The Astrophysical Journal Letters 957, L21 (2023).
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First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization
Akiyama K., J. Dexter, and et. al, The Astrophysical Journal Letters 957, L20 (2023).
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A relativistic outflow model of the X-ray polarization in Cyg X-1
Dexter J., and M.C. Begelman, Monthly Notices Of The Royal Astronomical Society: Letters 528, L157-L160 (2023).
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Characterization of black hole accretion through image moment invariants
Jimenez-Rosales A., A.I. Yfantis, M. Mościbrodzka, and J. Dexter, Monthly Notices Of The Royal Astronomical Society 527, 1847-1864 (2023).
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Polarimetry and Astrometry of NIR Flares as Event Horizon Scale, Dynamical Probes for the Mass of Sgr A*
Collaboration T.G., R. Abuter, N. Aimar, J. Dexter, and et. al, Astronomy & Astrophysics 677, L10 (2023).
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A Reemerging Bright Soft X-Ray State of the Changing-look Active Galactic Nucleus 1ES 1927+654: A Multiwavelength View
Ghosh R., S. Laha, J. Dexter, and et. al, The Astrophysical Journal 955, 3 (2023).
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Confronting a Thin Disk-Wind Launching Mechanism of Broad-Line Emission in AGN with GRAVITY Observations of Quasar 3C 273
Long K., J. Dexter, Y. Cao, R. Davies, F. Eisenhauer, D. Lutz, D. Santos, J. Shangguan, T. Shimzu, and E. Sturm, The Astrophysical Journal 193, 184 (2023).
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Comparison of Polarized Radiative Transfer Codes used by the EHT Collaboration
Prather B., J. Dexter, and et. al, The Astrophysical Journal 950, 35 (2023).
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Using the motion of S2 to constrain scalar clouds around Sgr A*
Foschi A., R. Abuter, J. Dexter, and et. al, Monthly Notices Of The Royal Astronomical Society 524, 1075-1086 (2023).
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Using the motion of S2 to constrain vector clouds around SgrA*
Collaboration G.R.A.V.I.T.Y., A. Foschi, R. Abuter, J. Dexter, and et. al, Submitted (2023).
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2022

Synchrotron Pair Production Equilibrium in Relativistic Magnetic Reconnection
Chen A.Y., D.A. Uzdensky, and J. Dexter, The Astrophysical Journal 944, 944 (2022).
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Resolving the Inner Parsec of the Blazar J1924–2914 with the Event Horizon Telescope
Issaoun S., M. Wielgus, J. Dexter, and et. al, The Astrophysical Journal 934, 145 (2022).
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Non-thermal emission from the plunging region: a model for the high-energy tail of black hole X-ray binary soft states
Hankla A., N. Scepi, and J. Dexter, Monthly Notices Of The Royal Astronomical Society 515, 775 (2022).
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First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
K. Akiyama, A. Alberdi, J.C. Algaba, and et. al., The Astrophysical Journal Letters 930, L12 (2022).
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Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibrati
K. Akiyama, A. Alberdi, W. Alef, and et. al., The Astrophysical Journal Letters 930, L13 (2022).
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First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole
K. Akiyama, A. Alberdi, W. Alef, and et. al., The Astrophysical Journal Letters 930, L14 (2022).
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Characterizing and Mitigating Intraday Variability: Reconstructing Source Structure in Accreting Black Holes with mm-VLBI
Broderick A.E., R. Gold, B. Georgiev, D. Pesce, and et. al., The Astrophysical Journal Letters 930, L21 (2022).
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Sgr A* X-ray flares from non-thermal particle acceleration in a magnetically arrested disc
Scepi N., J. Dexter, and M. Begelman, Monthly Notices Of The Royal Astronomical Society 511, 3536 (2022).
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The Variability of the Black-Hole Image in M87 at the Dynamical Time Scale
Satapathy K., D. Psaltis, F. Özel, J. Dexter, and et. al, The Astrophysical Journal 925, 13 (2022).
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Mass distribution in the Galactic Center based on interferometric astrometry of multiple stellar orbits
Abuter R., N. Aimar, J. Dexter, and et. al, Astronomy & Astrophysics Letters 657, L12 (2022).
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What really makes an accretion disc MAD
Begelman M.C., N. Scepi, and J. Dexter, Monthly Notices Of The Royal Astronomical Society 511, 2040–2051 (2022).
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Deep images of the Galactic center with GRAVITY
Collaboration G.R.A.V.I.T.Y., Astronomy & Astrophysics 657, A82 (2022).
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2021

Radiation GRMHD simulations of M87: funnel properties and prospects for gap acceleration
Yao P., J. Dexter, A.Y. Chen, B. Ryan, and G. Wong, Monthly Notices Of The Royal Astronomical Society 507, 4864-4878 (2021).
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Constraining particle acceleration in Sgr A* with simultaneous GRAVITY, Spitzer, NuSTAR and Chandra observations
Abuter R., A. Amorim, J. Dexter, and et. al, Astronomy & Astrophysics 654, A22 (2021).
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A geometric distance to the supermassive black Hole of NGC 3783
Collaboration G.R.A.V.I.T.Y., A. Amorim, M. Bauböck, M. Bentz, J. Dexter, and et. al, Astronomy & Astrophysics 654, A85 (2021).
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The mass of β Pictoris c from β Pictoris b orbital motion
Lacour S., J.J. Wang, L. Rodet, M. Nowak, J. Shangguan, H. Beust, A.-M. Lagrange, R. Abuter, A. Amorim, J. Dexter, and et al., Astronomy & Astrophysics 654, L2 (2021).
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Radiation GRMHD Simulations of the Hard State of Black Hole X-ray Binaries and the Collapse of a Hot Accretion Flow
Dexter J., N. Scepi, and M.C. Begelman, The Astrophysical Journal Letters 919, L20 (2021).
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GRAVITY K-band spectroscopy of HD 206893 B: brown dwarf or exoplanet
Kammerer J., S. Lacour, T. Stolker, J. Dexter, and et al., Astronomy & Astrophysics 652, A57 (2021).
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MOLsphere and pulsations of the Galactic Center s red supergiant GCIRS 7 from VLTI/GRAVITY
Collaboration G.R.A.V.I.T.Y., G. Rodríguez-Coira, T. Paumard, J. Dexter, and et al., Astronomy & Astrophysics 651, A37 (2021).
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The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole
Narayan R., D. Palumbo, M. Johnson, J. Dexter, and et al., The Astrophysical Journal 912, 35 (2021).
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The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
Amorim A., M. Bauböck, W. Brandner, M. Bolzer, Y. Clenet, R. Davies, P.T. de Zeeuw, J. Dexter, and et al., Astronomy & Astrophysics 648, A117 (2021).
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Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
Algaba J.C., J. Anczarski, J. Dexter, and et al., The Astrophysical Journal Letters 911, L11 (2021).
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Improved GRAVITY astrometric accuracy from modeling of optical aberrations
Abuter R., A. Amorim, M. Bauböck, J.P. Berger, H. Bonnet, W. Brandner, Y. Clenet, R. Davies, P.T. de Zeeuw, J. Dexter, and et al., Astronomy & Astrophysics 647, A59 (2021).
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Relative depolarization of the black hole photon ring in GRMHD models of Sgr A* and M87*
Jimenez-Rosales A., J. Dexter, S. Ressler, A. Tchekhovskoy, M. Bauböck, Y. Dallilar, P.T. de Zeeuw, A. Drescher, F. Eisenhauer, S. von Fellenberg, and F. Gao, Monthly Notices Of The Royal Astronomical Society 503, 4563–4575 (2021).
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Polarimetric Properties of Event Horizon Telescope Targets from ALMA
Goddi C., I. Martí-Vidal, H. Messias, J. Dexter, and et al., The Astrophysical Journal Letters 910, L14 (2021).
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First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
Akiyama K., J.C. Algaba, A. Alberdi, J. Dexter, and et al., The Astrophysical Journal Letters 910, L13 (2021).
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First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
Akiyama K., J.C. Algaba, A. Alberdi, J. Dexter, and et al., The Astrophysical Journal Letters 910, L12 (2021).
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Constraining the Nature of the PDS 70 Protoplanets with VLTI/GRAVITY
Wang J., A. Vigan, S. Lacour, M. Nowak, J. Dexter, and et al., The Astronomical Journal 161, 148 (2021).
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QPOs in compact binaries from small scale eruptions in an inner magnetized disk
Scepi N., M.C. Begelman, and J. Dexter, Monthly Notices Of The Royal Astronomical Society 500, 1547 (2021).
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Magnetic flux inversion in a peculiar changing look AGN
Scepi N., M.C. Begelman, and J. Dexter, Monthly Notices Of The Royal Astronomical Society: Letters 502, L50 (2021).
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2020

Determining sub-parsec supermassive black hole binary orbits with infrared interferometry
Dexter J., D. Lutz, T. Shimizu, J. Shangguan, R. Davies, P. de Zeeuw, E. Sturm, F. Eisenhauer, N. Förster-Schreiber, F. Gao, and R. Genzel, The Astrophysical Journal 905, 33 (2020).
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Polarization analysis of GRAVITY and the VLTI
Widmann F., F. Eisenhauer, O. Pfuhl, N. Schuhler, X. Haubois, A. Amorim, M. Baubock, W. Brandner, J. Dexter, feng gao, and P.J.V. Garcia, Optical And Infrared Interferometry And Imaging Vii 11446, online only (2020).
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The ExoGRAVITY project: using single mode interferometry to characterize exoplanets
Lacour S., J.J. Wang, M. Nowak, L.A. Pueyo, F. Eisenhauer, A.-M. Lagrange, P. Mollière, R. Abuter, A. Amorin, R. Asensio-Torres, and J. Dexter, Optical And Infrared Interferometry And Imaging Vii online only (2020).
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Dynamically important magnetic fields near the event horizon of Sgr A*
Jimenez-Rosales A., J. Dexter, F. Widmann, and M. Bauböck, Astronomy & Astrophysics 643, A56 (2020).
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The spatially resolved broad line region of IRAS 09149-6206
Amorim A., W. Brandner, Y. Clenet, R. Davies, P. de Zeeuw, J. Dexter, A. Eckart, F. Eisenhauer, N. Schreiber, F. Gao, and P. Garcia, Astronomy & Astrophysics 643, A154 (2020).
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Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
Psaltis D., J. Dexter, and et al, Physical Review Letters 125, 141104 (2020).
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Direct confirmation of the radial-velocity planet β Pictoris c
Nowak M., S. Lacour, A.-M. Lagrange, P. Rubini, J. Wang, T. Stolker, R. Abuter, A. Amorim, R. Asensio-Torres, M. Bauböck, and J. Dexter, Astronomy & Astrophysics 642, L2 (2020).
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Monitoring the Morphology of M87* in 2009–2017 with the Event Horizon Telescope
Wielgus M., K. Akiyama, L. Blackburn, C.-kwan Chan, J. Dexter, and et al., The Astrophysical Journal 901, 67 (2020).
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Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution
Dexter J., and et al., Astronomy & Astrophysics 640, A69 (2020).
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"Sgr A* near-infrared flares from reconnection events in a magnetically arrested disc"
Dexter J., Monthly Notices Of The Royal Astronomical Society 497, 4999-5007 (2020).
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Verification of Radiative Transfer Schemes for the EHT
Dexter J., and et al., The Astrophysical Journal 897, 148 (2020).
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The Flux Distribution of Sgr A*
Abuter R., A. Amorim, M. Bauboeck, H. Bonnet, W. Brandner, V. Cardoso, Y. Clenet, P. de Zeeuw, J. Dexter, A. Eckart, and F. Eisenhauer, Astronomy & Astrophysics 638, A2 (2020).
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The Effects of Tilt on the Images of Black Hole Accretion Flows
White C., J. Dexter, O.M. Blaes, and E. Quataert, The Astrophysical Journal 894, 14 (2020).
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Infrared interferometry to spatially and spectrally resolve jets in X-ray binaries
Markoff S., D. Russell, J. Dexter, O. Pfuhl, F. Eisenhauer, R. Abuter, J. Miller-Jones, and T.D. Russell, Monthly Notices Of The Royal Astronomical Society 495, 525–535 (2020).
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Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole
Abuter R., A. Amorim, M. Bauböck, J.P. Berger, H. Bonnet, W. Brandner, V. Cardoso, Y. Clenet, P. de Zeeuw, J. Dexter, and A. Eckart, Astronomy & Astrophysics 636, L5 (2020).
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2019

ALMA Observations of the Terahertz Spectrum of Sagittarius A*
Bower G., J. Dexter, K. Asada, C.D. Brinkerink, H. Falcke, P. Ho, M. Inoue, S. Markoff, D.P. Marrone, S. Matsushita, and M. Mościbrodzka, The Astrophysical Journal 881, L2 (2019).
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A geometric distance measurement to the Galactic center black hole with 0.3% uncertainty
Abuter R., A. Amorim, M. Bauböck, J.P. Berger, H. Bonnet, W. Brandner, Y. Clenet, C. du Foresto, P.T. de Zeeuw, J. Dexter, and G. Duvert, Astronomy & Astrophysics 625, L10 (2019).
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Chandra Spectral and Timing Analysis of Sgr A*'s Brightest X-Ray Flares
Haggard D., M. Nynka, B. Mon, N. de la C. Hernandez, M. Nowak, C. Heinke, J. Neilsen, J. Dexter, C. Fragile, F. Baganoff, and G. Bower, The Astrophysical Journal 886, 96 (2019).
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Scalar field effects on the orbit of S2 star
Collaboration G.R.A.V.I.T.Y., Monthly Notices Of The Royal Astronomical Society 489, 4606-4621 (2019).
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The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion and Broad Emission Line Physics from a Hypervariable Quasar
Dexter J., S. Xin, Y. Shen, C.J. Grier, T. Liu, S. Gezari, I.D. McGreer, W.N. Brandt, P.B. Hall, K. Horne, and T. Simm, The Astrophysical Journal 885, 44 (2019).
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2018

Extreme AGN variability: evidence of magnetically elevated accretion?
Dexter J., and M.C. Begelman, Monthly Notices Of The Royal Astronomical Society: Letters 483, L17 - L21 (2018).
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