MG14 - Talk detail

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The Event Horizon Telescope (EHT) aims to link mm telescopes spread around the world into a network with baselines in excess of 10,000 km. Such array will have the resolution and the sensitivity to image of SgrA*, the 4 million solar-mass black hole in the center of our Galaxy as well as its much more massive and active counterpart in the nearby galaxy M87. I will review EHT's first-time detection in 2007 as a 3-station array of emission on event-horizon scales around SgrA*. This result formed the basis for a steady expansion of the array and other key developments. Most recently, the addition of the South Pole Telescope (SPT) and Large Millimeter Telescope (Mexico), and preparatory observations at the Atacama Large Millimeter/submillimeter Array (Chile). Also the introduction of polarimetry and this year’s deployment of new next-generation wideband VLBI equipment that can take advantage of the large increase in bandwidth of submm receivers. Together these ongoing developments are greatly increasing the sensitivity and imaging capability of the EHT towards its ultimate goal of obtaining a first image, and possibly definitive proof, of an event horizon.

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