Author Topic: Early Galaxies and Black Holes Grew Up Together  (Read 644 times)

0 Members and 1 Guest are viewing this topic.

Offline Buster's Uncle

  • Celebrating AC2's 10th Year- Little Terraformer That Could
  • Ascend
  • *
  • Posts: 47295
  • €727
  • View Inventory
  • Send /Gift
  • Because there are times when people just need a cute puppy  Soft kitty, warm kitty, little ball of fur  Someone thinks a Winrar is You!  
  • AC2 is my instrument, my heart, as I play my song.
  • Planet tales writer Smilie Artist Custom Faction Modder AC2 Wiki contributor Downloads Contributor
    • View Profile
    • My Custom Factions
    • Awards
Early Galaxies and Black Holes Grew Up Together
« on: October 04, 2012, 03:59:14 PM »
Quote
Early Galaxies and Black Holes Grew Up Together
By SPACE.com Staff | SPACE.com – 3 hrs ago.. .

 
As galaxies feverishly churned out new stars in the early universe, the huge black holes at their hearts were firing off intense bursts of energy, a new study reveals.
 
The discovery could help explain why more massive galaxies host more massive central black holes, researchers said. And the find sheds light on the dynamics and growth of so-called "active galaxies" such as quasars, which were abundant in the early universe.
 
By contrast, many modern galaxies, including our own Milky Way, are inactive, with quiet central black holes and very low star-forming rates.
 
"It is becoming clear that active galaxies are not only among the largest, most distant, most powerful and most spectacular objects in the universe, but also among the most important objects," study lead author Peter Barthel, of the University of Groningen in the Netherlands, said in a statement.
 
"Many if not all massive normal galaxies must also have gone through similar phases of simultaneous black hole-driven activity and star formation," he added.
 
Barthel and his colleagues trained the European Space Agency's far-infrared Herschel space telescope on 70 faraway active galaxies, whose supermassive black holes blast out jets of exotic and intense radiation. These jets are powered by steady accretion of material onto the black holes.
 
Until recently, little was known about these distant active galaxies, and their relationship to the population of "normal" galaxies remained mysterious, researchers said. But the new results could help clear things up.
 
The team found that many of the active galaxies emit strong far-infrared radiation. This indicates that vigorous star formation is taking place, creating hundreds of new stars per year during one or more episodes lasting millions of years, researchers said.
 
The detection of bright radio-wavelength jets also implies strong, simultaneous black hole accretion. So the ancient, distant galaxies grew in tandem with their central black holes long ago, birthing new stars and firing off jets that became increasingly intense as the black holes' appetites got bigger and bigger.
 
The study was published last month in The Astrophysical Journal Letters.
http://news.yahoo.com/early-galaxies-black-holes-grew-together-112819705.html

Someone pointed me at a better source for space news - thing is, going to multiple places for articles is too much work - this is hardly the only thing at this forum that I do, or that burns up my finite time. 

Everyone is welcome to post science articles here, however.  Please.

 

* User

Welcome, Guest. Please login or register.
Did you miss your activation email?


Login with username, password and session length

Select language:

* Community poll

SMAC v.4 SMAX v.2 (or previous versions)
-=-
21 (7%)
XP Compatibility patch
-=-
9 (3%)
Gog version for Windows
-=-
88 (30%)
Scient (unofficial) patch
-=-
34 (11%)
Kyrub's latest patch
-=-
14 (4%)
Yitzi's latest patch
-=-
87 (30%)
AC for Mac
-=-
2 (0%)
AC for Linux
-=-
6 (2%)
Gog version for Mac
-=-
11 (3%)
No patch
-=-
15 (5%)
Total Members Voted: 287
AC2 Wiki Logo
-click pic for wik-

* Random quote

The boundary between cold water and warm, the Thermocline, has been important to undersea warfare for hundreds of years of man's history. Now we have found away to harness that power for constructive purposes. Once what cloaked us can now feed us. Once what shielded us from death, now brings us life.
~Captain Ulrik Svensgaard 'The Ripple and the Wave'

* Select your theme

*