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#SpaceVLBI

Prof Heino Falckehfalcke
2024-06-10

Exciting new results: You want to make exquisite movies of black holes from space? It can be done with just three small dishes on different orbits around earth - the EventHorizonImager concept!

Have a look at our new paper „Imaging the event horizon of M87* from space on different timescales“

by Shlentsova et al. in aanda.org/articles/aa/full_htm

Reconstructed images are almost as good as the simulations.

Reconstruction of a simulated M87* shadow observation with the EHI at 230 GHz for 400 km orbital separation. From left to right: the middle theoretical emission map in the period of 37 days (the model with 3.7 days between frames); frames of the simulated movies, each lasting 37 days, reconstructed using snapshot imaging and dynamical imaging methods. For the EHI observing at 230 GHz, these movies demonstrate the best quality, according to the NXCORR, among all reconstructions that image source dynamics. The source is varying during the simulated observation. Colours indicate brightness/pixel in mJy (square root scale). The full reconstruction is available as an online movie.Parts of the uυ-coverage (baseline separation) of 8.9-h duration for 30, 400, and 1000 km separations of the orbits at 230 GHz; first, 81st, and 161st snapshots are shown (from top to bottom). Blue points correspond to the most separate pair of satellites; red points correspond to the pair of the innermost and the middle satellites; green points correspond to the pair of the middle and the outermost satellites.

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