Goa PIO leads the NASA team to find the farthest galaxy group

PANAJI: an international team of astronomers linked to Pot , led by a scientist of Indian origin born in Goa, discovered a group of galaxies never seen before, now labeled as EGS77, which is the one that has ever been seen.

In 2013, Tilvi was also part of a team that discovered the farthest galaxy ever seen by astronomers. It is estimated that the new group of galaxies, EGS77, is more than 13 billion light years from Earth. It took Tilvi and his team more than four years to make the findings.

This group of galaxies can now help astronomers see the Universe directly in their childhood, and see what chemicals were present when the Universe was just born.

As we look more and more, we look back in time. This is because the starlight that carries information about the group of galaxies is coming to Earth now, after traveling for 13 billion years, Tilvi told TOI.

"Usually, it is difficult to see galaxies as far as EGS77 because of the presence of neutral hydrogen fog in the Universe, which blocks some of the ," James Rhoads of Pot , a team member, said.

Fortunately, the intense heat of these same galaxies clears the surrounding hydrogen mist, allowing the light of the galaxy to travel freely to Earth. Galaxies and the group of galaxies such as EGS77 must have cleared all the hydrogen mist, which leads to the transition from the opaque universe to a transparent one we see today.

This is a tremendous achievement and will advance our knowledge about how the Universe evolved, Tilvi said.

The findings of the discovery of EGS77 are presented for the first time on January 5, at the conference in Hawaii.

"While this is the first galaxy group identified as being responsible for clearing hydrogen fog, future Pot missions will tell us much more," said Sangeeta Malhotra at Pot , co-author of the paper "Onset of Cosmic Reionization: Evidence of An Ionized Bubble Merely 680 Myr (million years) after the Big Bang".

In 2013, Tilvi was part of a team that discovered the farthest galaxy in the Universe and, in 2017, led a team of astronomers who discovered the first black hole candidate in the Universe.

Currently, he is the project leader for a Pot -funded project to study this black hole using observations taken by the Hubble Space Telescope . Tilvi is also part of the Pot 's Wide Field Infrared Survey Telescope (WFIRST) team, which is going to be launched in 2025.

The distance of EGS77 from the Earth means it is at the very edge of what can be observed using the current best technology on a platform like the Hubble Space Telescope .

"The current telescopes we have, like the Hubble Space Telescope , were not meant to discover galaxies this far. But we are pushing the limits. In another one and a half years, James Webb Telescope will be launched, which is much bigger than Hubble Space Telescope , and our plan is to use this new telescope to see groups like EGS77," Tilvi said.

Currently, Tilvi is a visiting researcher at the School of Earth and Space Exploration, at Arizona State University, USA. UU., And is contributing to the State Council of Higher Education of the Goa government as a professor of research, development and innovation.