Spacetime Tomography Using the Event Horizon Telescope

Paul Tiede, Hung Yi Pu, Avery E. Broderick, Roman Gold, Mansour Karami, Jorge A. Preciado-López

研究成果: 雜誌貢獻期刊論文同行評審

22 引文 斯高帕斯(Scopus)


We have now entered a new era of high-resolution imaging astronomy with the beginning of the Event Horizon Telescope (EHT). The EHT can resolve the dynamics of matter in the immediate vicinity around black holes at and below the horizon scale. One of the candidate black holes, Sagittarius A∗, flares 1-4 times a day depending on the wavelength. A possible interpretation of these flares could be hotspots generated through magnetic-reconnection events in the accretion flow. In this paper, we construct a semi-analytical model for hotspots that includes the effects of shearing as a spot moves along the accretion flow. We then explore the ability of the EHT to recover these hotspots. Even including significant systematic uncertainties, such as thermal noise, diffractive scattering, and background emission due to an accretion disk, we were able to recover the hotspots and spacetime structure to sub-percent precision. Moreover, by observing multiple flaring events we show how the EHT could be used to tomographically map spacetime. This provides new avenues for testing relativistic fluid dynamics and general relativity near the event horizon of supermassive black holes.

期刊Astrophysical Journal
出版狀態已發佈 - 2020 4月 1

ASJC Scopus subject areas

  • 天文和天體物理學
  • 空間與行星科學


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