Feeds

Junior astronomer spots junior supernova

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

Boost IT visibility and business value

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. ®

Gartner critical capabilities for enterprise endpoint backup

More from The Register

next story
LOHAN packs bags for SPACEPORT AMERICA!
Spanish launch goes titsup, we're off to the US of A
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
Astronomers scramble for obs on new comet
Amateur gets fifth confirmed discovery
Boffins build CYBORG-MOTHRA but not for evil: For search & rescue
This tiny bio-bot will chew through your clothes then save your life
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
prev story

Whitepapers

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.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
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?