Darkforum.com - Dark Stories, Dark Art, Poetry, Photography, Debates and Discussions
Home Register FAQ
Go Back   Darkforum.com - Dark Stories, Dark Art, Poetry, Photography, Debates and Discussions > Discussions > Entertainment
Reload this Page Black sheep Black hole.
Reply
 
Thread Tools Display Modes
Old 04-25-03   #1
Lazarus
†Ange de la Mort†
 
Lazarus's Avatar
 
Join Date: Dec 2001
Location: The Dark Side of the Moon..
Posts: 3,467
Lazarus is on a distinguished road
Credits: 75,766
Black sheep Black hole.

The classic explanation for black hole birth describes an incredibly explosive and luminous event. A massive star explodes, then implodes, hovers a while, then collapses into an incredibly small region of stunning density. But new observations revealed today suggest some black holes are born in the dark without any noisy fanfare.

Nobody can see black holes. By definition, their gravitational clutches are so powerful that matter and light cannot escape. Astronomers study them by examining what's emitted from their surroundings as matter spirals inward and is superheated, producing X-rays, visible light, radio waves and more.

In the standard model, a stellar black hole -- containing the mass of a handful or even a few dozens suns -- forms after an exploded star first collapses into a neutron star, explained Felix Mirabel of the French Service d'Astrophysique and Instituto de Astronomía Físcia del Espacio in Buenos Aires. The neutron star is very dense, but not as dense as a black hole. It is unstable, however, and leads to the formation of a black hole.

Mirabel recently found evidence for this standard model in a runaway black hole, an object shooting across the galaxy, and one he figures was launched by the supernova of its birthplace. But until now there was no evidence black holes are created without associated supernova.

Mirabel and his colleague, Irapuan Rodrigues, say they found this evidence in a black hole named Cygnus X-1.

"We propose that the way this black hole formed is different," Mirabel told SPACE.com. "The massive stellar progenitor imploded, that is it collapsed and formed the black hole directly, without launching matter and light far away. There was no luminous explosion for an external observer when it formed."

The conclusion results from speculation of the environment of the black hole's birth based on an examination of massive stars in the region today and how Cygnus X-1 moves in relation to the other stars.

The progenitor star was about 40 times the mass of the Sun, the researchers write in paper published today in the online version of the journal Science. The resultant black hole contains about 10 solar masses. The researchers say this setup could not have involved the sudden expulsion of more than about 1 solar mass of material, which is much less than supernovae are known to cough up.

"The observations suggest that high-mass stellar black holes may form promptly, when massive stars disappear silently," they write.

-----------------------------

Interesting.
is Offline   Reply With Quote
Old 04-25-03   #2
Qoji
Dark Q
 
Qoji's Avatar
 
Join Date: Aug 2001
Location: The Dark Continuum
Posts: 4,448
Qoji is on a distinguished road
Credits: 79,924
Kinda spooky too.
is Offline   Reply With Quote
Old 04-26-03   #3
Lazarus
†Ange de la Mort†
 
Lazarus's Avatar
 
Join Date: Dec 2001
Location: The Dark Side of the Moon..
Posts: 3,467
Lazarus is on a distinguished road
Credits: 75,766
Well it may prove that many of the theories about the development of black stars are off quite a bit.. but then.. most theories are..
is Offline   Reply With Quote
Old 05-04-03   #4
prometheus
Darkness Incarnate
 
prometheus's Avatar
 
Join Date: Aug 2002
Posts: 1,462
prometheus is on a distinguished road
Credits: 47,208
I'm confused. You say the progenitor of Cygnus X-1 was 40 solar masses, and that the resultant black hole was 10 Solar masses, and that 1 solar mass of material was ejected into space.

We know that mass is basically a concentrated form of energy, and that while they are transmutable, energy cannot be created or destroyed (E=m^2c^4 + p^2c^2), so where have the other 29 solar masses gone?
is Offline   Reply With Quote
Old 05-13-03   #5
PrinceJDRI
Private Ryan
 
PrinceJDRI's Avatar
 
Join Date: Apr 2002
Location: OR
Posts: 113
PrinceJDRI
Credits: 4,668
Black holes have still never been "proven" to exist, just very probable. they "exist" (to our knowledge) as much as White holes, hence the whole Wormhole thing. Are we going to leap into the Star Trek era? methinks not.
__________________
"To escape in a simple dreamless sleep, leaving every responsibility behind,
And forget the jumbled, fleeting thoughts, that rule the chaos of our mind" Daina Smith



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

at
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


is Offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Recent Threads
sup oezoem we mished you
1 Day Ago 22:02
Last post by Sic Simon
1 Day Ago 00:19
Hey fr0g
10-20-17 02:49
Last post by Sic Simon
1 Day Ago 21:47
Fuck Snow
3 Days Ago 03:36
Last post by Sic Simon
1 Day Ago 21:46
Science Disproves...
11-01-10 15:38
by Pahu
Last post by Pahu
1 Day Ago 10:04
What Are you Listening...
03-21-05 07:40
By Cucking Funt
Last post by Sic Simon
2 Days Ago 21:32
are you gonna eat your...
11-01-17 01:43
Last post by Sic Simon
1 Week Ago 03:45
Things that I'm not...
10-30-05 21:09
Last post by Sic Simon
1 Week Ago 00:51
basic earthling rights
07-17-14 22:08
Last post by Sic Simon
1 Week Ago 22:11
Where are the tits?
3 Weeks Ago 20:38
Last post by Sic Simon
3 Weeks Ago 21:33
Obama sends a letter.
10-19-17 22:42
Last post by Sic Simon
3 Weeks Ago 14:09
Online Users: 58
0 members and 58 guests
No Members online
Most users ever online was 1928, 06-09-15 at 19:20.
Powered by vBadvanced CMPS v3.0 RC2


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
vBulletin Skin developed by: vBStyles.com

© 2006 - 2016 Dark Forum | About Dark Forum | Advertisers | Investors | Legal | A member of the Crowdgather Forum Community