Loading...

Elements S4 • E75

This Quasar Discovery Could Hold the Key to How Galaxies Die

116,770 views

Loading...

Loading...

Transcript

The interactive transcript could not be loaded.

Loading...

Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Aug 5, 2019

A recent discovery suggests a quasar might not be the signal of a galaxy's death.
Go to https://NordVPN.com/seeker to get 75% off a 3 year plan and use code SEEKER for an extra month for free!

» Subscribe to Seeker! http://www.youtube.com/subscription_c...
» Watch more Elements! https://www.youtube.com/playlist?list...

Supermassive black holes with up to 10 billion times the mass of our sun are thought to be at the center of most large galaxies.

As the powerful gravity of a supermassive black hole sucks in material, it can create a ring of superheated matter brighter than a galaxy itself called a quasar. Because a quasar is so bright and can be seen from so far away, quasars looks almost like stars, hence the name, which comes from “quasi-stellar radio source.”

Astronomers long thought that a quasar was the signal of a galaxy’s demise, the sign of a passive dead galaxy where no more stars will form.That’s because the magnetic field surrounding the gas can get twisted up, steering gas away from the black hole and launching it into space, shutting off the gas supply the galaxy needs to form new stars.

Quasars only last as long as their fuel source allows, and after they run out of gas a faint galaxy is all that’s left behind.

But is it possible, somewhere in that span, the galaxy gets one last hurrah? The recent discovery of cold quasars has changed how we think galaxies end their life cycles.

Find out more with Julian on this episode of Elements.

We Just Discovered How the Milky Way’s Twin Was Destroyed
https://youtu.be/hNEWm6lWho0

Read More:
'Cold Quasars' May Be at the End of Their Lives, But They Can Still Birth Stars
https://www.space.com/cold-quasars-ga...
"Combining all those data sources, the scientists' investigation revealed that about 10% of galaxies with accreting supermassive black holes still held onto a supply of cold gas and made new stars."

Quasar
https://astronomy.swin.edu.au/cosmos/...
"They are thought to be powered by supermassive black holes (black holes with a mass of more than one billion solar masses) which lie at the center of massive galaxies."

Astrophysicist announces her discovery that could rewrite story of how galaxies die
https://www.eurekalert.org/pub_releas...
"The KU astrophysicist suspected the "cold quasars" in her survey represented a brief period yet to be recognized in the end-phases of a galaxy's lifespan -- in terms of a human life, the fleeting "cold quasar" phase may something akin to a galaxy's retirement party."

Go to https://NordVPN.com/seeker to get 75% off a 3 year plan and use code SEEKER for an extra month for free!
____________________

Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening all around us. Join our passionate hosts as they help break down and present fascinating science, from quarks to quantum theory and beyond.

Seeker explains every aspect of our world through a lens of science, inspiring a new generation of curious minds who want to know how today’s discoveries in science, math, engineering and technology are impacting our lives, and shaping our future. Our stories parse meaning from the noise in a world of rapidly changing information.

Visit the Seeker website https://www.seeker.com/videos

Elements on Facebook https://www.facebook.com/SeekerElements/

Subscribe now! http://www.youtube.com/subscription_c...

Seeker on Twitter http://twitter.com/seeker

Seeker on Facebook https://www.facebook.com/SeekerMedia/

Seeker http://www.seeker.com/

Loading...

Advertisement
When autoplay is enabled, a suggested video will automatically play next.

Up next


to add this to Watch Later

Add to

Loading playlists...