Udayavni Special

India’s multi-wavelength satellite AstroSat makes rare discovery: IUCAA


PTI, Aug 25, 2020, 12:32 PM IST

Pune: AstroSat, India’s first multi-wavelength satellite, has detected an extreme ultraviolet (UV) light from a galaxy which is 9.3 billion light-years away from Earth, the Inter-University Centre for Astronomy and Astrophysics (IUCAA) said on Monday.

A release from the Pune-based Inter-University Centre for Astronomy and Astrophysics said a global team led by IUCAA scientists have achieved the major breakthrough.

“India’s first multi-wavelength satellite, which has five unique X-ray and ultraviolet telescopes working in tandem, AstroSat, has detected extreme-UV light from a galaxy, called AUDFs01, 9.3 billion lightyears away from Earth,” said it said.

The discovery was made by an international team of astronomers led by Dr Kanak Saha, associate professor of astronomy at the IUCAA, and published on August 24 by ‘Nature Astronomy’, the release said.

This team comprised scientists from India, France, Switzerland, the USA, Japan and The Netherlands.

Saha and his team observed the galaxy, which is located in the Hubble Extreme Deep field, through AstroSat. These observations lasted for more than 28 hours in October 2016, the release stated.

But it took nearly two years since then to carefully analyse the data to ascertain that the emission is indeed from the galaxy. Since UV radiation is absorbed by the Earth’s atmosphere, it has to be observed from space, it said.

Earlier, NASA’s Hubble Space Telescope (HST), a significantly larger than UVIT (UV imaging telescope), did not detect any UV emission (with energy greater than 13.6 eV) from this galaxy because it is too faint, it said.

AstroSat/UVIT was able to achieve this unique feat because the background noise in the UVIT detector is much less than the ones on HST,” said the release quoting Saha.

Saha said they knew it would be an uphill task to convince the international community that UVIT has recorded extreme-UV emission from this galaxy when more powerful HST has not.

Dr Somak Raychaudhury, Director of IUCAA, said, “This is a very important clue to how the dark ages of the universe ended and there was light in the universe. We need to know when this started, but it has been very hard to find the earliest sources of light. I am very proud that my colleagues have made such an important discovery.”

Udayavani is now on Telegram. Click here to join our channel and stay updated with the latest news.

Top News

Why lie on SC order on national task force, Fadnavis asks Sena

U’khand has highest COVID fatality rate among Himalayan states: NGO

Practically impossible to provide oxygen to other states due to rising COVID cases: Kerala CM tells Centre

Nalin Kumar Kateel donates Rs. 2.50Cr to Dakshina Kannada for Covid-19 relief

‘Karnataka plans to open triaging centres in Dakshina Kannada, 9 other dists’

Kolkata Durga idol makers anxious about business in second Covid-hit year

Users not accepting new privacy terms to face limited functionality: WhatsApp



Related Articles More

Why lie on SC order on national task force, Fadnavis asks Sena

Armed forces helping admin in fight against COVID-19: Centre to HC

U’khand has highest COVID fatality rate among Himalayan states: NGO

Twitter handle of J-K Lt Governor suspended briefly, officials cite technical error

Practically impossible to provide oxygen to other states due to rising COVID cases: Kerala CM tells Centre

MUST WATCH

Kuwait ship carrying medical oxygen arrives at Navamangalore port

Dr Dinesh Shetty | Current Situation in Karnataka | Udayavani

Young man comes to buy vegetables wearing doctor’s apron

Unique Safety Method to save from Police

Udayavani 10 -May -2021 News Bulletin

Latest Additions

Why lie on SC order on national task force, Fadnavis asks Sena

Armed forces helping admin in fight against COVID-19: Centre to HC

U’khand has highest COVID fatality rate among Himalayan states: NGO

Twitter handle of J-K Lt Governor suspended briefly, officials cite technical error

Practically impossible to provide oxygen to other states due to rising COVID cases: Kerala CM tells Centre

Thanks for visiting Udayavani

You seem to have an Ad Blocker on.
To continue reading, please turn it off or whitelist Udayavani.