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Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre

Author

Listed:
  • Sheperd S. Doeleman

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Jonathan Weintroub

    (Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA)

  • Alan E. E. Rogers

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Richard Plambeck

    (University of California Berkeley, 601 Campbell, Berkeley, California 94720-3411 USA)

  • Robert Freund

    (Arizona Radio Observatory, Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson Arizona 85721-0065, USA)

  • Remo P. J. Tilanus

    (James Clerk Maxwell Telescope, Joint Astronomy Centre, 660 North A’ohoku Place University Park, Hilo, Hawaii 96720, USA
    Netherlands Organization for Scientific Research, Laan van Nieuw Oost-Indie 300, NL2509 AC The Hague, The Netherlands)

  • Per Friberg

    (James Clerk Maxwell Telescope, Joint Astronomy Centre, 660 North A’ohoku Place University Park, Hilo, Hawaii 96720, USA)

  • Lucy M. Ziurys

    (Arizona Radio Observatory, Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson Arizona 85721-0065, USA)

  • James M. Moran

    (Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA)

  • Brian Corey

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Ken H. Young

    (Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA)

  • Daniel L. Smythe

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Michael Titus

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Daniel P. Marrone

    (National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA
    Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA)

  • Roger J. Cappallo

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Douglas C.-J. Bock

    (CARMA, PO Box 968, Big Pine, California 93513-0968, USA)

  • Geoffrey C. Bower

    (University of California Berkeley, 601 Campbell, Berkeley, California 94720-3411 USA)

  • Richard Chamberlin

    (Caltech Submillimeter Observatory, 111 Nowelo Street, Hilo, Hawai’i 96720, USA)

  • Gary R. Davis

    (James Clerk Maxwell Telescope, Joint Astronomy Centre, 660 North A’ohoku Place University Park, Hilo, Hawaii 96720, USA)

  • Thomas P. Krichbaum

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

  • James Lamb

    (OVRO, California Institute of Technology, 100 Leighton Lane, Big Pine, California 93513-0968, USA)

  • Holly Maness

    (University of California Berkeley, 601 Campbell, Berkeley, California 94720-3411 USA)

  • Arthur E. Niell

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • Alan Roy

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

  • Peter Strittmatter

    (Arizona Radio Observatory, Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson Arizona 85721-0065, USA)

  • Daniel Werthimer

    (University of California Berkeley, Space Sciences Laboratory, Berkeley, California 94720-7450, USA)

  • Alan R. Whitney

    (Massachusetts Institute of Technology (MIT) Haystack Observatory, Off Route 40, Westford, Massachusetts 01886, USA)

  • David Woody

    (OVRO, California Institute of Technology, 100 Leighton Lane, Big Pine, California 93513-0968, USA)

Abstract

Black hole physics: A new window on the Galactic Centre Using Very Long Baseline Interferometry (VLBI) at the relatively short radio wavelength of 1.3 mm, a new intrinsic size estimate has been obtained for Sagittarius A*, the supermassive black hole candidate at the centre of the Milky Way. The resulting lower limit on the size of Sgr A* is less than the predicted size of the event horizon of the presumed black hole, suggesting that Sgr A* emissions centre not on the black hole itself but on the surrounding accretion flow. VLBI observations of the Galactic Centre at around 1.3 mm, less influenced by interstellar scattering than those made at longer wavelengths, open a new window onto black-hole physics that will become even more sensitive as new VLBI stations are built.

Suggested Citation

  • Sheperd S. Doeleman & Jonathan Weintroub & Alan E. E. Rogers & Richard Plambeck & Robert Freund & Remo P. J. Tilanus & Per Friberg & Lucy M. Ziurys & James M. Moran & Brian Corey & Ken H. Young & Dani, 2008. "Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre," Nature, Nature, vol. 455(7209), pages 78-80, September.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7209:d:10.1038_nature07245
    DOI: 10.1038/nature07245
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