#astronomy Armagh astronomers lead worldwide workforce on ground-breaking analysis – Astronotes

April 1, 2021 - Comment

Scientists monitor comet which has been in orbit for hundreds of thousands of years in one other photo voltaic system A global workforce of scientists led by Armagh Observatory and Planetarium astronomer, Dr Stefano Bagnulo has carried out ground-breaking analysis on a comet which has been in orbit for hundreds of thousands of years in


Scientists monitor comet which has been in orbit for hundreds of thousands of years in one other photo voltaic system

A global workforce of scientists led by Armagh Observatory and Planetarium astronomer, Dr Stefano Bagnulo has carried out ground-breaking analysis on a comet which has been in orbit for hundreds of thousands of years in one other photo voltaic system.

Dr Bagnulo was supported within the analysis challenge by his colleagues at Armagh Observatory and Planetarium, Dr Apostolos Christou, Dr Galin Borisov and Dr Rok Nezic.

The analysis, which is printed in extremely revered science journal, Nature Communications, has been centred on the Comet 2I/Borisov which was found in August 2019 by astronomer Gennadiy Borisov from his personal observatory within the Crimean Peninsula.

This picture was taken with the FORS2 instrument on ESO’s Very Giant Telescope in late 2019, when comet 2I/Borisov handed close to the Solar.
Credit score:ESO/O. Hainaut

Borisov is one in all solely two objects, the opposite being asteroid 1I/`Oumuamua present in 2017, that scientists imagine have come from one other photo voltaic system. In different phrases, these two objects have been in all probability born in orbit round a star completely different from our Solar. 

Within the months previous to the pandemic, Dr Bagnulo led scientists from Bulgaria, France, Italy, Spain, the UK and the US on analysis primarily based on information collected on the European Southern Observatory’s Eight-m Very Giant Telescope (VLT) in Chile’s Atacama Desert.

From December 2019 to March 2020, the workforce used the VLT to review the polarisation of daylight mirrored from the cloud of mud, often called the coma, on the head of the comet.

This picture reveals an artist’s close-up view of what the floor of the comet may seem like.  Credit score:ESO/M. Kormesser

Armagh Observatory and Planetarium astronomer, Dr Bagnulo stated: “It’s a privilege to have this paper printed in Nature Communications because it underlines the world class analysis which is happening right here at Armagh Observatory.

“I used to be proud to guide such an distinctive workforce of scientists, not least my colleagues from Armagh who performed such an essential position within the analysis.

“We tracked the comet’s altering polarisation because it moved by way of the photo voltaic system. Polarisation is a property of the incoming mild wave that’s used to diagnose the traits of a strong floor or a particulate medium.

“One in every of our observations even happened on Christmas Day, and it made us smile to assume right here was a gaggle of clever males monitoring an incredible mild within the sky.

“After amassing and analysing the information, it was discovered that polarised mild from Borisov behaves in a singular method, in contrast to what we observe from most different our bodies within the photo voltaic system. 

“Certainly, the one object that comes near Borisov on this respect seems to be Hale-Bopp, a spectacular once-in-a-lifetime comet that graced earth’s skies in 1997.

“Though Hale Bopp is completely different from Borisov in that it nearly positively belongs to the photo voltaic system, it in all probability has approached the solar solely as soon as earlier than, maybe within the third millenium BC, the rest of its existence having been spent within the chilly area removed from the solar and the opposite planets.

“This led our workforce to suggest that the distinctive polarisation behaviour of Borisov is as a result of extraordinarily pristine situation of its floor, having spent hundreds of thousands of years close to absolute zero within the area between the celebs.

“As an interstellar comet, Borisov is up to now a one-off, however the workforce expects extra objects prefer it to be discovered within the foreseeable future, due to new, highly effective survey amenities coming on-line, as an example the Vera C. Rubin Observatory able to scanning all the sky each few days.”

This animation reveals the orbit (in pink) of the interstellar comet 2I/Borisov, which was the second and most not too long ago detected interstellar object to go to our Photo voltaic System.
Credit score:ESA/Area Engine (spaceengine.org)/L. Calçada. Music: Johan B. Monell

One in every of these future discoveries might come underneath scrutiny by Comet Interceptor, a deep-space mission by the European Area Company anticipated to happen in the direction of the tip of the last decade. Dr Bagnulo is already actively concerned within the mission that scientist hope will give us our first close-up glimpse of an extrasolar physique. 

Click on right here to learn the ESO launch.



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