Never miss a story

Get subscribed to our newsletter


×
Polarisation allows astronomers to map the magnetic field lines present around the inner edge of the black hole. Pixabay

A new view of a supermassive black hole marks the first time astronomers have captured and mapped polarisation, a sign of magnetic fields, so close to the edge of a black hole.
Images released by the Event Horizon Telescope (EHT) collaboration revealed how the black hole, some 55 million light-years away at the center of galaxy M87 appears in polarised light.

The EHT collaboration involves more than 300 researchers from Africa, Asia, Europe, North and South America. Scientists still do not understand how magnetic fields — areas where magnetism affects how matter moves — influence black hole activity. Do they help direct matter into the hungry mouths of black holes? Can they explain the mysterious jets of energy that extend out of the galaxy’s core?


Follow NewsGram on Facebook to stay updated.

In two studies published in The Astrophysical Journal Letters, EHT astronomers revealed their latest findings and how magnetic fields may be influencing the black hole at the center of M87.

“One of the main science drivers of the EHT is distinguishing different magnetic field configurations around the black hole,” said Angelo Ricarte, a co-author and researcher at the Center for Astrophysics; Harvard and Smithsonian.

“Polarisation is one of the most direct probes into the magnetic field that nature provides.”


The EHT collaboration has been studying the supermassive object at the heart of M87 for well over a decade. In April 2019, the team’s hard work paid off when they revealed the very first image of a black hole. Since then, scientists have delved deeper into the data, discovering that a significant fraction of the light around the M87 black hole is polarised.

Light becomes polarized when it goes through certain filters, like the lenses of polarised sunglasses, or when it is emitted in hot regions of space that are magnetized. In the same way, polarised sunglasses help us see better by reducing reflections and glare from bright surfaces, astronomers can sharpen their view of the black hole by looking at how light originating from there is polarised. Specifically, polarisation allows astronomers to map the magnetic field lines present around the inner edge of the black hole.

ALSO READ: Researchers Discover Galaxy Surviving Black Hole’s Hunger

“In order to gain confidence in our analysis, we used as many as five distinct methods to calibrate the data and reconstruct polarimetric images,” said Maciek Wielgus, a researcher at Harvard’s Black Hole Initiative and the Center for Astrophysics (CfA) who participated in the study.

“This huge team effort paid off as we found very good consistency between results obtained with all the different techniques.” To observe the heart of the M87 galaxy, the EHT collaboration linked eight telescopes around the world, including the Smithsonian Astrophysical Observatory’s Submillimeter Array, to create a virtual Earth-sized telescope. (IANS/SP)


Popular

Unsplash

The Microsoft office

Microsoft has disrupted the activities of a China-based hacking group, gaining control of the malicious websites the group used to attack organisations in the US and 28 other countries around the world.

The Microsoft Digital Crimes Unit (DCU) said in a statement that a federal court in Virginia granted its request to seize websites of the hacking group called 'Nickel', enabling the company to cut off Nickel's access to its victims and prevent the websites from being used to execute attacks.

Keep Reading Show less
Unsplash

MediaTek's plans to boost technology democratisation and enable access to disruptive connectivity

Chip manufacturer MediaTek on Monday announced that it is focused on making 2022 a year aimed at rapid growth, business success, substantial expansion in Research and Development capabilities.

MediaTek's plans to boost technology democratisation and enable access to disruptive connectivity with its range of mainstream to flagship 5G chips.

"We at MediaTek are focused on making 2022 a year aimed at rapid growth, business success, and substantial expansion in our R&D capabilities. For 2022, we are focused on further strengthening our presence in India, offering incredible experiences to customers, and supporting the country's technology initiatives with our expertise and collaboration with leading OEMs," Anku Jain, Managing Director, MediaTek India said in a statement.

Follow NewsGram on LinkedIn to know what's happening around the world.

In the flagship segment, MediaTek recently announced the Dimensity 9000 chip, which is a milestone of innovation and a rise to the incredible, built-to-power flagship 5G smartphones in the world, the company claims.

MediaTek Dimensity 9000 features a single Cortex-X2 performance core clocked at 3.05GHz, three Cortex-A710 cores at 2.85GHz and four Cortex-A510 efficiency cores at 1.8GHz.

It packs a 10-core Arm Mali-G710 that takes care of graphics processing, the report said.

Keep Reading Show less
Unsplash

There have already been voices in the US demanding most of the "China concept stocks" be removed from the US.

If the US loses Chinese companies, Wall Street will gradually alienate itself from the world's most prosperous market and the US will no longer be the true global financial centre, Chinese state media claimed.

Didi Chuxing, the Chinese ride-hailing giant, announced on Friday that the company is starting the work of delisting from the New York Stock Exchange (NYSE) and initiating preparations for listing in Hong Kong.

Keep reading... Show less