Image: Apjlab0ec7f3 EHT-image-of-M87-black-hole

Description: First image of a black hole. Top: EHT image of M87* from observations on 2019 April 11 as a representative example of the images collected in the 2019 campaign. The image is the average of three different imaging methods after convolving each with a circular Gaussian kernel to give matched resolutions. The largest of the three kernels (20 μas FWHM) is shown in the lower right. The image is shown in units of brightness temperature, Tb=Sλ2/2kBΩ{\displaystyle {T}_{\rm {b}}=S{\lambda }^{2}/2{k}_{\rm {B}}{\rm {\Omega }}}, where S is the flux density, λ is the observing wavelength, kB is the Boltzmann constant, and Ω is the solid angle of the resolution element. Bottom: similar images taken over different days showing the stability of the basic image structure and the equivalence among different days. North is up and east is to the left.
Title: Apjlab0ec7f3 EHT-image-of-M87-black-hole
Credit: (2019). "First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole". The Astrophysical Journal 875. DOI:10.3847/2041-8213/ab0ec7. ISSN 2041-8213. Figure 3
Author: The Event Horizon Telescope Collaboration
Permission: Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
License Link: https://creativecommons.org/licenses/by/3.0
Attribution Required?: Yes