[Show all top banners]

sajhabahadur
Replies to this thread:

More by sajhabahadur
What people are reading
Subscribers
:: Subscribe
Back to: Kurakani General Refresh page to view new replies
 Two black holes seem to collide, I don't see it will threaten our planet?
[VIEWED 5214 TIMES]
SAVE! for ease of future access.
Posted on 03-06-09 3:00 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Astronomers have, for the first time, discovered what seems to be a
binary set of supermassive black holes. The galactic beasts are
orbiting each other about every 100 years, and ultimately they will
collide with enough force to trip gravitational-wave detectors on Earth.


Spotting a single supermassive black hole is fairly easy, so much so
that astronomers are convinced that one lurks in the center of just
about every galaxy. Finding two supermassives locked in a binary orbit
is another story. Only about as big as a solar system--though they can
weigh as much as a billion suns--spotting them as distinct objects is
as difficult as finding the proverbial needle in the haystack.


But that's what a pair of astronomers from the National Optical
Astronomical Observatory in Tucson, Arizona, appear to have done. Todd
Boroson and Tod Lauer were combing through the Sloan Digital Sky
Survey, a collection of images and spectral information on hundreds of
thousands of galaxies, when their software flagged a quasar whose light
characteristics differed significantly from the rest of the sample.
Quasars are the most luminous objects in the universe, and their
brightness is thought to be caused by the energy from supermassive
black holes consuming tremendous amounts of surrounding gas and dust.



Tomorrow in Nature,
the two researchers report finding telltale twin hydrogen lines in the
quasar's spectrum, instead of the one line that would emanate from a
single black hole. Based on the twin lines, Boroson and Lauer calculate
that two supermassives are separated by only 0.3 light-years--one-tenth
the distance from the sun to its nearest neighbor--and are orbiting
each other at the blinding speed of 6000 kilometers per second. For
comparison, the sun's orbital speed around the galaxy's center is about
220 kilometers per second. "Sometimes discoveries depend on recognizing
something as interesting even if it wasn't what you were looking for,"
Boroson says. If this one is confirmed, he adds, it should vastly
improve what astronomers know about how supermassives merge and how
they light up quasars.


"Wow, that is certainly an interesting discovery," says astronomer
Steven Willner of the Harvard-Smithsonian Center for Astrophysics in
Cambridge, Massachusetts. Follow-up observations should reveal "a lot
more about the environment around the black holes," he says. Astronomer
Alan Marscher of Boston University says the paper does seem to show
more than one supermassive black hole, which is new but expected,
because two galaxies in the process of merging would contain two
supermassive black holes.


 
Posted on 03-06-09 8:28 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

u are focking kidding me ...are we gonna die


 


 
Posted on 03-07-09 6:12 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 
 
Posted on 03-07-09 9:33 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Gwarcha,

Here you go :-) . The source is from science journal which is relatively famous.

http://sciencenow.sciencemag.org/cgi/content/full/2009/304/1

 
Posted on 03-07-09 12:24 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Humm.. the article doesn't say which galaxy these black holes are in or maybe I missed it... Interesting none-the-less

 


Please Log in! to be able to reply! If you don't have a login, please register here.

YOU CAN ALSO



IN ORDER TO POST!




Within last 365 days
Recommended Popular Threads Controvertial Threads
Lets play Antakshari...........
[New post] Why Would Krishna Have To Run From The Battlefield
डीभी परेन भने खुसि हुनु होस् ! अमेरिकामाधेरै का श्रीमती अर्कैसँग पोइला गएका छन् !
शीर्षक जे पनि हुन सक्छ।
What are your first memories of when Nepal Television Began?
Sajha Poll: नेपालका सबैभन्दा आकर्षक महिला को हुन्?
ChatSansar.com Naya Nepal Chat
is Rato Bangala school cheating?
NRN card pros and cons?
Basnet or Basnyat ??
TPS Re-registration case still pending ..
निगुरो थाहा छ ??
TPS Re-registration
Nas and The Bokas: Coming to a Night Club near you
ओच्छ्यान मुत्ने समस्या ( confession )
अमेरिकामा छोरा हराएको सूचना
susta manasthiti lai ke bhanchan english ma?
Returning to Nepal with us citizenship. Property ownership
Anybody gotten the TPS EAD extension alert notice (i797) thing? online or via post?
Do nepalese really need TPS?
Nas and The Bokas: Coming to a Night Club near you
Mr. Dipak Gyawali-ji Talk is Cheap. US sends $ 200 million to Nepal every year.
Harvard Nepali Students Association Blame Israel for hamas terrorist attacks
TPS Update : Jajarkot earthquake
is Rato Bangala school cheating?
NOTE: The opinions here represent the opinions of the individual posters, and not of Sajha.com. It is not possible for sajha.com to monitor all the postings, since sajha.com merely seeks to provide a cyber location for discussing ideas and concerns related to Nepal and the Nepalis. Please send an email to admin@sajha.com using a valid email address if you want any posting to be considered for deletion. Your request will be handled on a one to one basis. Sajha.com is a service please don't abuse it. - Thanks.

Sajha.com Privacy Policy

Like us in Facebook!

↑ Back to Top
free counters