2008
DOI: 10.1038/nature07245
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Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre

Abstract: The cores of most galaxies are thought to harbour supermassive black holes, which power galactic nuclei by converting the gravitational energy of accreting matter into radiation 1 . Sagittarius A*, the compact source of radio, infrared and X-ray emission at the centre of the Milky Way, is the closest example of this phenomenon, with an estimated black hole mass that is 4 million times that of the Sun 2,3 . A long-standing astronomical goal is to resolve structures in the innermost accretion flow surrounding Sg… Show more

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Cited by 790 publications
(771 citation statements)
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“…With near future mm-VLBI at frequencies at and above 230 GHz, the imaging of the central region of SgrA* will become possible, allowing to map out the structure of SgrA* on spatial scales of only a few gravitational radii (Doeleman et al 2008). By this it should be possible to directly test the hypothesis of spiraling plasmons or density waves in the accretion disk.…”
Section: Preliminary Results Of the May 2007 Mm-observationsmentioning
confidence: 99%
“…With near future mm-VLBI at frequencies at and above 230 GHz, the imaging of the central region of SgrA* will become possible, allowing to map out the structure of SgrA* on spatial scales of only a few gravitational radii (Doeleman et al 2008). By this it should be possible to directly test the hypothesis of spiraling plasmons or density waves in the accretion disk.…”
Section: Preliminary Results Of the May 2007 Mm-observationsmentioning
confidence: 99%
“…In particular, this likely includes Sagittarius A* in the galactic center. The application of our methodology to Sgr A* is particularly important given the wealth of multi-wavelength data (e.g., Serabyn et al 1997, Zhao et al 2003, Genzel et al 2003, Baganoff et al 2003, Barrière et al 2014 and current and forthcoming spatially resolved observations with the Event Horizon Telescope (Doeleman et al 2008) and Gravity (Gillessen et al 2010). …”
Section: Introductionmentioning
confidence: 99%
“…Perhaps due to these reasons, "black hole physics" conjures up images of horizons and time-warps and old-fashioned, frozen-in-time topics to lay audiences. However, in the last years the activity in the field is bubbling up and the interest in these issues has widened, driven by several unrelated events at the observational/instrumental, technical and conceptual levels such as (i) our capacity to observationally scrutinize the region close to the horizon within a few Schwarzschild radii, with radio and deep infrared interferometry, of which we have seen but the first steps [1,2,3,4];…”
Section: Introductionmentioning
confidence: 99%
“…However, in the last years the activity in the field is bubbling up Vitor Cardoso CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade Técnica de Lisboa -UTL, Av. Rovisco Pais 1, 1049 Lisboa, Portugal E-mail: vitor.cardoso@ist.utl.pt Present address: Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2J 2W9, Canada 2 Vitor Cardoso and the interest in these issues has widened, driven by several unrelated events at the observational/instrumental, technical and conceptual levels such as (i) our capacity to observationally scrutinize the region close to the horizon within a few Schwarzschild radii, with radio and deep infrared interferometry, of which we have seen but the first steps [1,2,3,4];…”
Section: Introductionmentioning
confidence: 99%
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