Feeds

Eta Carinae brightens Chandra's day

New pics of an old explosion

Secure remote control for conventional and virtual desktops

NASA has released a striking new image of explosive neighbouring star Eta Carinae. The star is huge: somewhere between 100 and 150 times the size of our own sun. It is also consuming its fuel at a truly astonishing rate.

The star is currently teetering along a knife edge, almost at equilibrium: its gravity just about balanced by the huge outward pressure generated by the nuclear furnace at its core. But the star is incredibly unstable, and the tiniest perturbation could cause a massive eruption of material.

Star goes boom: Credit Credit: X-ray: NASA/CXC/GSFC/M.Corcoran et al.; Optical: NASA/STScI

Star goes boom. Credit: X-ray: NASA/CXC/GSFC/M.Corcoran et al.

Optical: NASA/STScI

Back in 1840, this is exactly what happened. The star shed something close to 10 times the mass of our sun in a single explosive belch of matter. Eta Carinae briefly became the second brightest star in the sky.

The remnants of the explosion - which should have destroyed the star - can still be seen today in the image that NASA has released. The image is a composite, with data taken from both Hubble and the Chandra-X observatory.

The blue areas, courtesy of Hubble, show cool optical emissions from the a bi-polar shell of dust and gas the star shrugged off in 1840. This area is surrounded by a cloud of fainter material, more ragged in appearance.

Data from the X-ray observatory, Chandra, shows the regions much further from the star where the material it expelled has collided with gas and dust nearby. The collision has heated the matter above a scorching million degrees.

The X-ray data show that this superheated region is filled with complex atoms, such as nitrogen, which would have been produced inside Eta Carinae itself, and become part of the stellar surface before being ejected. They also reveal a slight glow of X-ray reflection on the optical nebula.

NASA researchers explain that the X-rays causing this come from very close to the star itself. They are generated by the interaction of Eta-Carinae's million mile-per-hour stellar wind, and the much faster wind from its companion star (not pictured).

NASA says the companion star is something of a mystery: it is not known what role it has played in the evolution of Eta-Carinae, nor what it might do in the future. ®

Next gen security for virtualised datacentres

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
NASA to reformat Opportunity rover's memory from 125 million miles away
Interplanetary admins will back up data and get to work
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?