- Estimation of systematic errors imposed by the uncertain astrophysical modelling of the global structure and microphysics of accretion flows
- Expansion of the classes of parameterized astrophysical models
- Quantitative exploration of the ability of short-timescale variability to constrain key properties of accretion, and how it may be exploited to probe the near-horizon spacetime structure
Black Hole Hunters - The New York Times
"Aiming to make the first portrait of the hungry monster at the centre of our galaxy, astronomers built a telescope as big as the world." Read the whole story.
Explosive Expansion at the EHT
This past winter, mm-VLBI experiments with the South Pole Telescope, Atacama Large Millimeter Array, and the Large Millimeter Telescope have been successful, bringing these new critical stations into the array. These additions will enable direct imaging of the black holes at the centre of the Milky Way and M87. See some of the coverage:
- A sharp view into black holes (Astronomy.com)
- Planet-sized telescope gives a sharp view into black holes (Astronomynow.com)
- Virtual Telescope Readies to Image Black Hole's Ring of Fire (Discovery News)
- Earth-sized virtual telescope to study supermassive black hole at centre of Milky Way (Gizmag)
In November 2014, 200 scientists from around the world attended the EHT 2014 conference at Perimeter Institute. During the week-long gathering, they discussed the opportunities presented by the EHT, the technological hurdles yet to be overcome, and the collaborative opportunities that await as the EHT project reaches its full potential. Conference details.
Confronting Einstein with the EHT
Perimeter researchers are trying to find out how far one can tweak general relativity and still end up with the universe we observe. Their method? Adding "hair" to black holes. Read the full article.
EHT Provides Best Evidence for Black Holes
The defining feature of a black hole is the event horizon. However, despite being a robust prediction of general relativity and the plethora of observational evidence for compact, massive objects at the hearts of galaxies and in some X-ray binaries, direct evidence for their existence is hard to come by. This has changed now that the EHT has been able to probe the horizon-scale structure of two black holes, providing compelling cases for the absence of a photosphere, and thus presumably for a horizon. That means that there are at least two "black holes" in the universe, lying at the centres of the Milky Way and the giant elliptical galaxy M87. Read more in this paper and in Sky & Telescope.