A

Ring Asymmetry and Spin in M87*

The Astrophysical Journal, vol. 1000, pp. 231

Abstract

Abstract Event Horizon Telescope (EHT) images of the supermassive black hole M87* depict an asymmetric ring of emission. General relativistic magnetohydrodynamic (GRMHD) models of M87* and its accretion disk predict that the amplitude and location of the ring’s peak brightness asymmetry should fluctuate due to turbulence in the source plasma. We compare the observed distribution of brightness asymmetry amplitudes to the simulated distribution in GRMHD models, across varying black hole spin a * . We show that, for strongly magnetized (MAD) models, three epochs of EHT data marginally disfavor ∣ a * ∣ ≲ 0.2. This is consistent with the Blandford–Znajek model for M87’s jet, which predicts that M87* should have nonzero spin. We show quantitatively how future observations could improve spin constraints and discuss how improved spin constraints could distinguish between differing jet-launching mechanisms and black hole growth scenarios.

Authors 100

  1. University of Arizona · University of Illinois Urbana-Champaign

    Affiliation as printed

    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

    Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

  2. University of Illinois Urbana-Champaign

    Affiliation as printed

    Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801, USA; nconroy2@illinois.edu

  3. University of Illinois Urbana-Champaign

    Affiliation as printed

    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

  4. Harvard University · Center for Astrophysics Harvard & Smithsonian

    Affiliation as printed

    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

  5. University of Illinois Urbana-Champaign

    Affiliation as printed

    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

    Illinois Center for Advanced Study of the Universe, 1110 West Green Street, Urbana, IL 61801, USA

  6. Los Alamos National Laboratory · University of Illinois Urbana-Champaign

    Affiliation as printed

    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

    Los Alamos National Lab, Los Alamos, NM, 87545, USA

  7. University of Illinois Urbana-Champaign · National Center for Supercomputing Applications

    Affiliation as printed

    Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801, USA; nconroy2@illinois.edu

    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

    Illinois Center for Advanced Study of the Universe, 1110 West Green Street, Urbana, IL 61801, USA

    National Center for Supercomputing Applications, 605 East Springfield Avenue, Champaign, IL 61820, USA

  8. Harvard University · National Astronomical Observatory of Japan · Massachusetts Institute of Technology

    Affiliation as printed

    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA

    National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

  9. Universitat de València

    Affiliation as printed

    Departament d’Astronomia i Astrofísica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, Spain

  10. Instituto de Astrofísica de Andalucía

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    Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain

  11. Max Planck Institute for Radio Astronomy

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    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

  12. University of Malaya

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    Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia

  13. Harvard University · Center for Astrophysics Harvard & Smithsonian · The University of Texas at San Antonio · Rice University

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

    Department of Physics & Astronomy, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA

    Physics & Astronomy Department, Rice University, Houston, TX 77005-1827, USA

  14. Institute of Astronomy and Astrophysics, Academia Sinica · Academia Sinica

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    Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Road, Taipei 106216, Taiwan, R.O.C

  15. Universitat de València · Max Planck Institute for Radio Astronomy

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    Departament d’Astronomia i Astrofísica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, Spain

    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

    Observatori Astronòmic, Universitat de València, C. Catedrático José Beltrán 2, E-46980 Paterna, València, Spain

  16. Max Planck Institute for Radio Astronomy · Chalmers University of Technology

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    Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-43992 Onsala, Sweden

    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

  17. University of Arizona

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    Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

  18. University of Concepción

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    Astronomy Department, Universidad de Concepción, Casilla 160-C, Concepción, Chile

  19. Massachusetts Institute of Technology

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    Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA

  20. Fermi National Accelerator Laboratory · University of Chicago

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    East Asian Observatory, 660 N. A’ohoku Place, Hilo, HI 96720, USA

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  22. Harvard University · Center for Astrophysics Harvard & Smithsonian

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    East Asian Observatory, 660 N. A’ohoku Place, Hilo, HI 96720, USA

    Institute of Astronomy and Astrophysics, Academia Sinica, 645 N. A’ohoku Place, Hilo, HI 96720, USA

    James Clerk Maxwell Telescope (JCMT), 660 N. A’ohoku Place, Hilo, HI 96720, USA

  26. Institut de Radioastronomie Millimétrique

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  27. Center for Astrophysics Harvard & Smithsonian

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  28. Max Planck Institute for Radio Astronomy

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    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

  29. University of Waterloo · Perimeter Institute

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    Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada

    Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, ON N2L 2Y5, Canada

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    Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, F-38400 Saint-Martin-d’Hères, France

  31. Radboud University Nijmegen

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    Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

  32. University of Massachusetts Amherst

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    Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA

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    Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, R. do Matão, 1226, São Paulo, SP 05508-090, Brazil

  34. University of Chicago

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    Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

  35. Princeton University

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    Princeton Gravity Initiative, Jadwin Hall, Princeton University, Princeton, NJ 08544, USA

  36. University of Arizona

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    Data Science Institute, University of Arizona, 1230 N. Cherry Avenue, Tucson, AZ 85721, USA

    Program in Applied Mathematics, University of Arizona, 617 N. Santa Rita, Tucson, AZ 85721, USA

    Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

  37. Harvard University · Center for Astrophysics Harvard & Smithsonian

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

  38. Harvard University · Center for Astrophysics Harvard & Smithsonian · University of Maryland, College Park

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

    Department of Physics, University of Maryland, 7901 Regents Drive, College Park, MD 20742, USA

  39. Institute of Astronomy and Astrophysics, Academia Sinica

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    Institute of Astronomy and Astrophysics, Academia Sinica, 645 N. A’ohoku Place, Hilo, HI 96720, USA

  40. Korea Astronomy and Space Science Institute

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    Korea Astronomy and Space Science Institute, Daedeok-daero 776, Yuseong-gu, Daejeon 34055, Republic of Korea

  41. University of Chicago

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    Department of Physics, University of Chicago, 5720 South Ellis Avenue, Chicago, IL 60637, USA

    Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

  42. Yonsei University · Korea Astronomy and Space Science Institute · Instituto de Astrofísica de Andalucía

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    Department of Astronomy, Yonsei University, Yonsei-ro 50, Seodaemun-gu, 03722 Seoul, Republic of Korea

    Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain

    Korea Astronomy and Space Science Institute, Daedeok-daero 776, Yuseong-gu, Daejeon 34055, Republic of Korea

  43. Chalmers University of Technology

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    Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-43992 Onsala, Sweden

  44. University of Chicago

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    Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

    Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

  45. Massachusetts Institute of Technology

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    Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA

  46. Goethe University Frankfurt · Universidad Nacional Autónoma de México

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    Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main, Germany

    Instituto de Astronomía, Universidad Nacional Autónoma de México (UNAM), Apdo Postal 70-264, Ciudad de México, Mexico

  47. Harvard University · Center for Astrophysics Harvard & Smithsonian · The University of Texas at San Antonio

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

    Department of Physics & Astronomy, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA

  48. Instituto de Astrofísica de Andalucía

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    Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain

  49. Princeton University

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    Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA

    NASA Hubble Fellowship Program, Einstein Fellow

  50. Istituto Nazionale di Fisica Nucleare, Sezione di Napoli · University of Naples Federico II

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    Dipartimento di Fisica “E. Pancini”, Università di Napoli “Federico II”, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli, Italy

    INFN Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli, Italy

  51. University of the Witwatersrand · Rhodes University · University of Pretoria

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    Centre for Radio Astronomy Techniques and Technologies, Department of Physics and Electronics, Rhodes University, Makhanda 6140, South Africa

    Department of Physics, University of Pretoria, Hatfield, Pretoria 0028, South Africa

    Wits Centre for Astrophysics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg 2050, South Africa

  52. Joint Institute for Laboratory Astrophysics · University of Colorado Boulder

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    JILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA

  53. University of Illinois Urbana-Champaign

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    Department of Physics, University of Illinois, 1110 West Green Street, Urbana, IL 61801, USA

  54. Shanghai Jiao Tong University

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    Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shengrong Road 520, Shanghai, 201210, People’s Republic of China

  55. Harvard University · Center for Astrophysics Harvard & Smithsonian

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

  56. Max Planck Institute for Radio Astronomy

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    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

  57. Center for Astrophysics Harvard & Smithsonian

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    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

  58. Radboud University Nijmegen

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    Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

  59. Las Cumbres Observatory Global Telescope Network · University of California, Santa Barbara

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    Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA

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  60. Massachusetts Institute of Technology

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    Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA

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  62. University of Arizona

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    Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

  63. Instituto de Astrofísica de Andalucía

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    Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain

  64. Radboud University Nijmegen

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    Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

  65. Google (United States) · Massachusetts Institute of Technology

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  66. East Asian Observatory

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    East Asian Observatory, 660 N. A’ohoku Place, Hilo, HI 96720, USA

    James Clerk Maxwell Telescope (JCMT), 660 N. A’ohoku Place, Hilo, HI 96720, USA

  67. Goethe University Frankfurt · University of Würzburg · Max Planck Institute for Radio Astronomy

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    Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Emil-Fischer-Str. 31, D-97074 Würzburg, Germany

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  68. Instituto de Astrofísica de Andalucía

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    Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain

  69. Harvard University

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    Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA

    Department of History of Science, Harvard University, Cambridge, MA 02138, USA

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    Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, F-38400 Saint-Martin-d’Hères, France

  71. Institut de Radioastronomie Millimétrique

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  72. University of Arizona

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  77. Center for Astrophysics Harvard & Smithsonian

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  80. University of Groningen

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  81. University of Arizona

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  82. Institute of Astronomy and Astrophysics, Academia Sinica · East Asian Observatory · Academia Sinica

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    East Asian Observatory, 660 N. A’ohoku Place, Hilo, HI 96720, USA

    Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Road, Taipei 106216, Taiwan, R.O.C

    James Clerk Maxwell Telescope (JCMT), 660 N. A’ohoku Place, Hilo, HI 96720, USA

  83. The Graduate University for Advanced Studies, SOKENDAI · National Astronomical Observatory of Japan · The University of Tokyo

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    Department of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

    Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

    Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan

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    Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Road, Taipei 106216, Taiwan, R.O.C

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    National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

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  87. Leiden University · National Radio Astronomy Observatory · Leiden Observatory

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    Leiden Observatory, Leiden University, Postbus 2300, 9513 RA Leiden, The Netherlands

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  88. Institute of Astronomy and Astrophysics, Academia Sinica · Academia Sinica

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    Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Road, Taipei 106216, Taiwan, R.O.C

  89. Center for Astrophysics Harvard & Smithsonian

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    Center for Astrophysics ∣Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

    NASA Hubble Fellowship Program, Einstein Fellow

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    ASTRAVEO LLC, PO Box 1668, Gloucester, MA 01931, USA

    Applied Materials Inc., 35 Dory Road, Gloucester, MA 01930, USA

  91. University of Arizona

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    Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA

  92. Radboud University Nijmegen · Max Planck Institute for Radio Astronomy

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    Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

    Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

  93. University of Turku · Aalto University

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    Aalto University Metsähovi Radio Observatory, Metsähovintie 114, FI-02540 Kylmälä, Finland

    Finnish Centre for Astronomy with ESO, University of Turku, FI-20014 Turun Yliopisto, Finland

  94. Radboud University Nijmegen

    Affiliation as printed

    Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

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