Crab Nebula: Noble gas molecules detected in space for the first time

Molecular ions of argon hydride were detected in supernova remnant

Noble gas molecules have been detected in space for the first time ever, a team of astronomers has announced.

The detection was made in the Crab Nebula, the remnants of a star that exploded 1,000 years ago and is 6,500 light years away, using the SPIRE (Spectral and Photometric Imaging Receiver) on board the European Space Agency’s Herschel Space Observatory.

The noble gases (argon, helium, neon, xenon, radon and krypton) are chemically unreactive, and therefore do not easily combine with other elements. In the right circumstances, they can form molecules, although this had only ever been achieved on Earth in laboratory conditions.

However, noble gas molecules in the form of argon hydride ions have now been detected outside the laboratory, in space.

“Discovering argon hydride ions here was unexpected because you don’t expect an atom like argon, a noble gas, to form molecules, and you wouldn’t expect to find them in the harsh environment of a supernova remnant,” said Professor Mike Barlow from University College London who led the study.

Initially, Barlow’s team of astronomers was looking to examine how exploding stars create such huge amounts of dust. But when studying emission lines (the wavelengths emitted by molecules spinning in space), the team noticed some unexpected readings.

The light coming from some regions of the Crab Nebula was showing “extremely strong and unexplained” peaks in intensity, ranging from 618 GHz to 1235 GHz. Upon consulting the databases of known properties of molecules, the scientists concluded that these wavelengths could only be coming from spinning molecular ions of argon hydride. The team further concluded that only the argon-36 isotope could rotate at such a rate.

Scientists had previously hypothesised that the elements created by supernovas should include a lot of argon-36 and no argon-40, which was supported by the discovery.

Professor Matt Griffin from Cardiff University said: “Here we see the excellent performance of the Herschel-SPIRE spectrometer, the expertise of the instrument team in producing the highest quality data, and the tenacity and vision of the scientists analysing it, all coming together to make an intriguing new discovery.” 

News
peoplePerformer had recently been diagnosed with prostate cancer
News
The surrealist comedian at the Q Awards in 2010
people
News
The comedian, 42, made the controversial comment following the athlete’s sentencing to five years for the culpable homicide of Reeva Steenkamp on Tuesday
people
Life and Style
Could you tell the difference between this and an organic alternative?
food + drink

Culinary experts in The Netherlands thought it was 'fresh' and 'tasty'

PROMOTED VIDEO
Sport
Today's Liverpool Echo back page
football
Life and Style
Six of the 76 Goats' cheese samples contained a significant amount of sheep's cheese
food + drink
News
Russell Brand arriving for the book launch in East London
peopleRussell Brand cancels his book launch debate due to concerns about the make-up of the panel
Arts and Entertainment
JK Rowling will not be releasing a 'romance' novel anytime soon
books
Arts and Entertainment
Contestants during this summer's Celebrity Big Brother grand finale
tvBroadcaster attempts to change its image following sale to US
Life and Style
tech

Of all the computers Apple has ever made there’s only one that Steve Jobs had to sell his car to finance

News
ebooksAn unforgettable anthology of contemporary reportage
Arts and Entertainment
Sarah Dales attempts to sell British Breeze in the luxury scent task
tvReview: 'Apprentice' candidates on the verge of tears as they were ejected from the boardroom
News
One of the 'princesses' in the video
videoYouTube reinstates sweary video after takedown for 'violating terms'
News
Call me Superman: one of many unusual names chosen by Chinese students
newsChinese state TV offers advice for citizens picking a Western moniker
Arts and Entertainment
film

Marvel has released first teaser trailer week early after it leaked online

Arts and Entertainment
Awesome foursome: Sam Smith shows off his awards
music22-year-old confirms he is 2014’s breakout British music success
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

SEN Teaching Assistant

£70 - £85 per day: Randstad Education Group: SEN Teaching Assistants needed in...

Year 4 Teacher required for 2 terms

£21500 - £35000 per annum: Randstad Education Cambridge: Randstad Education ar...

Accounts Assistant - Sales Ledger, Sage Line 50 - St Albans

£20000 - £22000 per annum + benefits: Ashdown Group: A highly successful and w...

EBD Teacher

£120 - £130 per day: Randstad Education Chelmsford: Are you a quailed Teacher ...

Day In a Page

How could three tourists have been battered within an inch of their lives by a burglar in a plush London hotel?

A crime that reveals London's dark heart

How could three tourists have been battered within an inch of their lives by a burglar in a plush London hotel?
Meet 'Porridge' and 'Vampire': Chinese state TV is offering advice for citizens picking a Western moniker

Lost in translation: Western monikers

Chinese state TV is offering advice for citizens picking a Western moniker. Simon Usborne, who met a 'Porridge' and a 'Vampire' while in China, can see the problem
Handy hacks that make life easier: New book reveals how to rid your inbox of spam, protect your passwords and amplify your iPhone

Handy hacks that make life easier

New book reveals how to rid your email inbox of spam, protect your passwords and amplify your iPhone with a loo-roll
KidZania lets children try their hands at being a firefighter, doctor or factory worker for the day

KidZania: It's a small world

The new 'educational entertainment experience' in London's Shepherd's Bush will allow children to try out the jobs that are usually undertaken by adults, including firefighter, doctor or factory worker
Renée Zellweger's real crime has been to age in an industry that prizes women's youth over humanity

'Renée Zellweger's real crime was to age'

The actress's altered appearance raised eyebrows at Elle's Women in Hollywood awards on Monday
From Cinderella to The Jungle Book, Disney plans live-action remakes of animated classics

Disney plans live-action remakes of animated classics

From Cinderella to The Jungle Book, Patrick Grafton-Green wonders if they can ever recapture the old magic
Thousands of teenagers to visit battlefields of the First World War in new Government scheme

Pupils to visit First World War battlefields

A new Government scheme aims to bring the the horrors of the conflict to life over the next five years
The 10 best smartphone accessories

Make the most of your mobile: 10 best smartphone accessories

Try these add-ons for everything from secret charging to making sure you never lose your keys again
Mario Balotelli substituted at half-time against Real Madrid: Was this shirt swapping the real reason?

Liverpool v Real Madrid

Mario Balotelli substituted at half-time. Was shirt swapping the real reason?
West Indies tour of India: Hurricane set to sweep Windies into the shadows

Hurricane set to sweep Windies into the shadows

Decision to pull out of India tour leaves the WICB fighting for its existence with an off-field storm building
Indiana serial killer? Man arrested for murdering teenage prostitute confesses to six other murders - and police fear there could be many more

A new American serial killer?

Police fear man arrested for murder of teen prostitute could be responsible for killing spree dating back 20 years
Sweetie, the fake 10-year-old girl designed to catch online predators, claims her first scalp

Sting to trap paedophiles may not carry weight in UK courts

Computer image of ‘Sweetie’ represented entrapment, experts say
Fukushima nuclear crisis: Evacuees still stuck in cramped emergency housing three years on - and may never return home

Return to Fukushima – a land they will never call home again

Evacuees still stuck in cramped emergency housing three years on from nuclear disaster
Wildlife Photographer of the Year: Intimate image of resting lions claims top prize

Wildlife Photographer of the Year

Intimate image of resting lions claims top prize
Online petitions: Sign here to change the world

Want to change the world? Just sign here

The proliferation of online petitions allows us to register our protests at the touch of a button. But do they change anything?