HomeLatest ThreadsGreatest ThreadsForums & GroupsMy SubscriptionsMy Posts
DU Home » Latest Threads » Forums & Groups » Topics » Science » Science (Group) » Giant, active galaxies fr...

Wed Aug 7, 2019, 06:33 PM

Giant, active galaxies from the early universe may have finally been found

The behemoths date to within 2 billion years after the Big Bang
BY MARIA TEMMING 1:00PM, AUGUST 7, 2019




KEEN EYES Using the Atacama Large Millimeter/submillimeter Array in Chile (pictured), astronomers found a slew of previously overlooked massive galaxies from the first 2 billion years of cosmic history.

© 2019 KOHNO ET AL.


Astronomers may finally have laid eyes on a population of enormous but elusive galaxies in the early universe.

These hefty, star-forming galaxies are shrouded in dust, which hid them from previous searches that used starlight. Now observations of radiation emitted by that interstellar dust have revealed dozens of massive, active galaxies from when the universe was younger than 2 billion years, researchers report online August 7 in Nature. These galaxies may be the long-sought precursors to heavyweight galaxies seen later in the universe’s history, as well as the most massive galaxies around today.

“Discovering massive galaxies at such early times is very exciting,” says Christina Williams, an astronomer at the University of Arizona in Tucson not involved in the work.

Big, inactive galaxies have been found dating back to a couple billion years after the Big Bang (SN Online: 3/14/14). But the formation of those gentle giants has remained mysterious. That’s because astronomers expect such massive, inactive galaxies to originate from big, star-forming powerhouses, and surveys of the earliest cosmos hadn’t uncovered a population of such star-forming progenitor galaxies.

More:
https://www.sciencenews.org/article/giant-active-galaxies-early-universe-may-have-finally-been-found

3 replies, 416 views

Reply to this thread

Back to top Alert abuse

Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
Arrow 3 replies Author Time Post
Reply Giant, active galaxies from the early universe may have finally been found (Original post)
Judi Lynn Aug 7 OP
tblue37 Aug 7 #1
TEB Aug 7 #2
Bayard Aug 7 #3

Response to Judi Lynn (Original post)

Wed Aug 7, 2019, 06:43 PM

1. K&R and thanks. nt

Reply to this post

Back to top Alert abuse Link here Permalink


Response to Judi Lynn (Original post)

Wed Aug 7, 2019, 06:55 PM

2. Once again you make me stop and think

Last edited Wed Aug 7, 2019, 08:10 PM - Edit history (1)

With your awesome post

Reply to this post

Back to top Alert abuse Link here Permalink


Response to Judi Lynn (Original post)

Wed Aug 7, 2019, 07:01 PM

3. I love astronomy

Thanks, Judy Lynn!

Reply to this post

Back to top Alert abuse Link here Permalink

Reply to this thread