Astronomers are gearing up for a groundbreaking mission to capture a moving image of a supermassive black hole, offering a unique glimpse into the enigmatic nature of these cosmic entities. The Event Horizon Telescope (EHT) will embark on this ambitious project by tracking the black hole at the center of the Messier 87 galaxy over two months. This endeavor holds the promise of revealing a different perspective on black holes, which are often depicted as menacing and inescapable.
The EHT, a global network of 12 radio telescopes, will observe the black hole from March to April, capturing footage of the swirling disc that defines the event horizon. This is the point where no light or matter can escape the gravitational pull of the black hole. The project's significance lies not only in its technological challenge but also in its potential to advance our understanding of black holes significantly.
Sera Markoff, the newly appointed Plumian professor of astronomy and experimental philosophy at the University of Cambridge, emphasizes the revolutionary nature of this movie campaign. She explains, "The movie campaign is really revolutionary, not just because it’s technologically extremely challenging, but because it will accelerate our science by an order of magnitude." This campaign aims to provide insights into the rotation speed of the black hole and the mechanisms behind the powerful jets it launches, addressing crucial questions in the field.
Black holes, despite their fearsome reputation, are increasingly recognized as key to understanding the early universe and the evolution of the first galaxies. Markoff clarifies, "Black holes have a bad rap as these evil vacuum cleaners that just suck everything up. To me, they represent the edge of our understanding of our universe, and they are endlessly fascinating. They actually play a very important role in the ecosystem of the universe."
The EHT's global network, spanning from Antarctica to Spain and Korea, will capture images of the black hole every three days as the Earth rotates. The black hole's immense size, equivalent to 6 billion suns, allows for the creation of a moving sequence from these snapshots. Measuring the black hole's spin speed is crucial for differentiating between theories of its growth, whether through accretion or merging with other black holes.
The observations could also shed light on the formation of black hole jets, which are among the most powerful structures in galaxies. These jets channel vast columns of gas, influencing star formation and galaxy growth. Markoff notes, "M87 is launching these enormous jets that punch through the entire galaxy. They can change the entire evolution of the galaxy and even surrounding galaxies."
Despite the excitement, the project faces a delay due to the volume of data generated by the telescopes. The scientists will have to wait for the Antarctic summer to physically transport the hard drives to Germany and the US for processing. This means the world will have to wait for a glimpse of the black hole in action, but the anticipation and potential discoveries make it a worthwhile endeavor.
Markoff, a distinguished astronomer, was appointed as the 17th Plumian professor, a position created by Sir Isaac Newton in 1704. Previous holders include renowned astronomers like Sir Arthur Eddington and Lord Martin Rees. Markoff hopes to use her position to encourage more people from underrepresented backgrounds to pursue careers in science, sharing her own journey from science fiction and comic books to her current role.
