Pulsars Could Help Map the Black Hole at the Center of the Milky Way universetoday storybywill
30-m radio telescope , and other instruments that form the backbone of the EHT.
These annotated images, obtained with the GRAVITY instrument on ESO’s Very Large Telescope Interferometer between March and July 2021, show stars orbiting very close to Sgr A*. Credit: ESO In this respect, the same technology used to snap the first image of Sgr A* will be used to spot binary pulsars orbiting it. It will also come down to the same methodology:. This consists of multiple radio telescopes working together and combining data to create higher-resolution images. So far, most pulsar searches have relied on the most sensitive element of the EHT: the “fully phased” ALMA.
“Because both EHT VLBI imaging and pulsar observations can utilize the same raw data product from each array element, EHT VLBI and pulsar observations can be commensal… In the future we can envisage using a phased array of the largest components of the EHT to further increase sensitivity or to mitigate site specific interference contamination.”
As always, advances in astronomy create new opportunities for study that go beyond the original mission. Originally designed to image the event horizons of supermassive black holes at the centers of galaxies, the EHT has opened doors for next-generation interferometry research. In the coming years, the unparalleled sensitivity these arrays offer could test the laws of physics under the most extreme conditions, providing new insight into the laws governing the Universe.
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