Feeds

Junior astronomer spots junior supernova

14-year-old student finds new type of solar explosion

Remote control for virtualized desktops

A 14-year-old student from New York state has become the youngest person in history to discover a supernova. And her find is also one of the most peculiar supernovae spotted to date.

For a massive stellar explosion, this one appears to be a dud.

Using a relatively small telescope, Caroline Moore spied the faint object located roughly 70 million light-years away from Earth.

Additional observations with more powerful telescopes determined the object, dubbed SN 2008ha, is a new type of exploding star, 1000 times more powerful than a nova, but 1000 times weaker than a typical supernova. Scientists say SN 2008ha effectively bridges the gap between the two.

Not-so-supernova, SN 2008ha. Credit: William Wiethoff

"If a normal supernova is a nuclear bomb, then SN 2008ha is a bunker buster," said Ryan Foley, Clay fellow at the Harvard-Smithsonian Center for Astrophysics and first author on the paper reporting the findings. "From one perspective, this supernova was an underachiever. However, you still wouldn't want to be anywhere near the star when it exploded."

Typical novae are thought to occur on the surface of a white dwarf star in a binary system (two stars orbiting around their common center of mass). If the white dwarf crowds its neighbor enough, it can suck up the gas from the other star. Occasionally, the new material becomes hot enough to start nuclear fusion on the white dwarf's surface — causing the small, dense star to suddenly become extremely bright.

If the white dwarf eats a sufficient amount of its stellar companion, it can raise the star's core temperature enough to ignite runaway nuclear fusion (viz: pop goes the weasel.) This is defined as a type Ia supernova.

"You can imagine many ways for a star to explode that might resemble SN 2008ha," said Robert Kirschner of the Harvard-Smithsonian Center for Astrophysics. "It could have been a massive star suddenly collapsing to form a black hole, with very little energy leaking out. But it looks a lot like its brighter cousins, which we think are nuclear explosions of white dwarfs. Maybe this one was an explosion of that general type, just much, much weaker."

The scientists describe that in a typical supernova explosion, light from the different chemical elements is "smeared" across the electromagnetic spectrum, courtesy the Doppler effect. Moore's SN 2008ha, however, paints a clearer picture because the star shrapnel is traveling at a mere 4.5 million miles per hour, compared to a brisk 22 million mph for a typical supernova. The lets boffins analyze the composition of SN 2008ha to a greater precision.

Astronomers hope the newest generation of telescopes and instruments will spot much more of this type of event in the next few years.

The paper was accepted for publication in the Astronomical Journal and is available here. ®

Internet Security Threat Report 2014

More from The Register

next story
Bond villains lament as Wicked Lasers withdraw death ray
Want to arm that shark? Better get in there quick
Antarctic ice THICKER than first feared – penguin-bot boffins
Robo-sub scans freezing waters, rocks warming models
Your PHONE is slowly KILLING YOU
Doctors find new Digitillnesses - 'text neck' and 'telepressure'
SEX BEAST SEALS may be egging each other on to ATTACK PENGUINS
Boffin: 'I think the behaviour is increasing in frequency'
Reuse the Force, Luke: SpaceX's Elon Musk reveals X-WING designs
And a floating carrier for recyclable rockets
The next big thing in medical science: POO TRANSPLANTS
Your brother's gonna die, kid, unless we can give him your, well ...
NASA launches new climate model at SC14
75 days of supercomputing later ...
Renewable energy 'simply WON'T WORK': Top Google engineers
Windmills, solar, tidal - all a 'false hope', say Stanford PhDs
Britain's HUMAN DNA-strewing Moon mission rakes in £200k
3 days, and Kickstarter moves lander 37% nearer takeoff
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
Seattle children’s accelerates Citrix login times by 500% with cross-tier insight
Seattle Children’s is a leading research hospital with a large and growing Citrix XenDesktop deployment. See how they used ExtraHop to accelerate launch times.
10 threats to successful enterprise endpoint backup
10 threats to a successful backup including issues with BYOD, slow backups and ineffective security.
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?