Massive Explosion of Unknown Origin Rips Through Neighboring Galaxy at Incredible Speed

nivek

As Above So Below
Massive Explosion of Unknown Origin Rips Through Neighboring Galaxy at ‘Incredible Speed’

mysterious-explosion-deep-space.jpg

Astronomers at the Keck Observatory, located on the dormant volcano Mauna Kea in Hawaii, have recently observed a massive explosion 100 times brighter than a supernova ripping through a neighboring galaxy—and they have no idea what caused it.

The event—or object—is referred to as “The Cow,” which seems a distinctly boring name for a violent, galaxy destroying explosion of unknown origin. It was detected as far brighter than an average supernova, and moving at an anomalously fast speed.

The team of astronomers working the ATLAS telescope at the Keck Observatory reported the event in the Astronomer’s Telegram, where it sparked international curiosity and where the automated naming and cataloging system of the Telegram listed the report as “AT2018cow.”

While the brightness of the explosion is unusual, the speed at which it reached peak brightness is even more strange. Usually, large deep space explosions take weeks to reach their maximum brightness. The cow reached its peak brightness in two days. Scientists say that the explosion is made up of high-energy particles traveling at a rate of 12,000 miles per second and has a temperature of 16,000 degrees Fahrenheit.

Speaking to New Scientist, Dr Kate McGuire of the ATLAS team, described the deep space explosion:
It really just appeared out of nowhere. There are other objects that have been discovered that are as fast, but the fastness and the brightness, that’s quite unusual. There hasn’t really been another object like this.
Initially, the explosion was thought to have occurred in our own galaxy.

Due to the incredible brightness of the exploding cow, astronomers assumed that it was far closer than it actually is. A team of Chinese astronomers who trained their telescopes at the event calculated that “The Cow” is actually a whopping 200-million light years away, which would put it in a different galaxy entirely. So, if this thing keeps going, we’ll be alright for a good while. There’s a lot things you can do with 200 million years.

supernova-deep-space-mystery-explosion-570x428.jpg

The explosion is up to 100 times brighter than a supernova.

Scientists don’t have any idea what caused this event, however. According to Dr McGuire:
We’re not sure yet what it is, but the normal powering mechanism for a supernova is radioactive decay of nickel, and this event is too bright and too fast for that.
The event currently has 18 telescopes from around the world pointed at it, which is the largest number of concurrent observations of any celestial event reported to the Astronomer’s Telegram, according to the site’s editor-in-chief. Scientists say that they should have more information about the cosmic cow in the next few days.

.
 

nivek

As Above So Below
Well if that explosion reaches here I will be long gone...I wonder if this is a black hole explosion, has anyone every heard of or has it been theorized what would happen if a black hole were to explode?...What would cause a black hole to explode?...It seems most things if not all in our universe has the potential to detonate, our earth could get hit by something big and explode, so I can logically assume under the right conditions, whatever those conditions may be, a black hole could explode with a power unlike we've seen before...

What do you think could have caused such a powerful explosion?... @Thomas R. Morrison

...
 
Well if that explosion reaches here I will be long gone...I wonder if this is a black hole explosion, has anyone every heard of or has it been theorized what would happen if a black hole were to explode?...What would cause a black hole to explode?...It seems most things if not all in our universe has the potential to detonate, our earth could get hit by something big and explode, so I can logically assume under the right conditions, whatever those conditions may be, a black hole could explode with a power unlike we've seen before...

What do you think could have caused such a powerful explosion?... @Thomas R. Morrison

...
It's a fascinating story and we'll need to see a thorough analysis before we can understand what happened. It's only two orders of magnitude brighter than the supernovas that we know about, so I assume that they've just found a new class of supernova event, perhaps one triggered by a stellar merger.

I'm not aware of any mechanism that can make a black hole explode like that - the gravitational acceleration is faster than the speed of light so it's the perfect containment field. It's theorized that black holes can very slowly evaporate via Hawking radiation which increases in intensity as the black hole shrinks, and finally flashes out of existence when it gets very small, but that model usually involves tiny black holes when they finally disappear altogether in a flash of particles, so I don't think that wouldn't explain an event of this magnitude. The actual minimum size of a black hole is still an area of active debate though - we don't have a clear understanding of the last moments of a black hole's life cycle. I'd be stunned if they could go out with that kind of bang.

So all we can do is wait and see what they find through a careful analysis of the data they're collecting right now. I'm sure they'll figure it out; astronomy has made huge strides in recent decades, both observationally and theoretically.
 
It could have been two merging neutron stars.
The biggest explosions in the Universe
Those are amazingly bright but they usually last less than 30 seconds, and evidently the explosion we're seeing here has been bright for days, so I'm guessing that this is a discovery of something new, like a new class of supernova event:

"Some bursts were short-lived, flaring for only a few milliseconds. Others were longer, glowing for 30 seconds or more."
 
Top