Political Wrinkles  

Go Back   Political Wrinkles > General Discussion > Science, Inventions & Space
Register FAQDonate PW Store PW Trivia Members List Calendar Search Today's Posts Mark Forums Read

Science, Inventions & Space Discuss The Neutron Star Cooling Mystery at the General Discussion; Links in the story at the site. The Neutron Star Cooling Mystery Analysis by Nicole Gugliucci | Mon Apr 19, ...

Reply
 
Share LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 04-20-2010, 06:18 PM
mlurp's Avatar
PW Enlightenment
 
Join Date: Mar 2008
Location: Flatlands
Gender: Male
Posts: 37,087
Thanks: 18,638
Thanked 10,740 Times in 8,372 Posts
Default The Neutron Star Cooling Mystery

Links in the story at the site.

Quote:
The Neutron Star Cooling Mystery

Analysis by Nicole Gugliucci | Mon Apr 19, 2010 12:43 AM ET

How can we probe the interiors of neutron stars? Astronomers Wynn Ho and Craig Heinke have approached this tough question using the Chandra X-Ray Observatory. They monitored a nearby neutron star at the center of the Cassiopeia supernova remnant (created by a supernova that occurred in the 1680s), a mere 11,000 light-years away. However, their work has created more questions than answers.

Neutron stars are some of the most exotic objects in our universe. They are incredibly dense, such that if you could scoop out a bit of neutron star material with a thimble, it would weigh as much as a mountain. They are so compact that a neutron star with the same mass as our sun would measure the size of a city!

With densities such as these, the interiors of these dead stars are truly bizarre. As the name suggests, they are made almost entirely of neutral particles that are normally found inside the nuclei of atoms. But no proper atoms can survive inside these stars because they're packed in so very tightly.

We don't fully understand the structure of neutron stars' interiors, but there are some interesting theories. For example, the neutrons may act as a superfluid, which is an unusual situation where a fluid flows without friction or viscosity. If you rotate a cup with a superfluid inside, the fluid itself will stay still, apparently ignoring the force of gravity.

Ho presented temperature measurements over a 10-year period with Chandra at the recent Royal Astronomical Society's National Astronomy Meeting. The rate at which the neutron star cools tells us something about the interior, since young neutron stars cool by radiating neutrinos, very light particles that hardly interact with matter, from deep inside the star. These observations help rule out certain models of neutron star cooling and interiors.

However, the scientists noticed the neutron star cooled in 2006, a change in temperature they didn't expect. Since the original press release was written, the researchers reprocessed the data and realized the observed cooling was real. Heinke says that they can't yet explain why this cooling happened. Some other process may be affecting the neutron star, so they will be investigating further.

In the end, we have more questions than answers after careful observation, as often happens in astronomy.

Thanks to Craig Heinke for more info on this story and answering my questions!

Image Credit: NASA/CXC/Southampton/W. Ho et al.; Illustration: NASA/CXC/M.Weiss.
The Neutron Star Cooling Mystery : Discovery News
__________________



_ ... _ Improvise - Adapt - Over Come ... _ ...
Reply With Quote
The Following 2 Users Say Thank You to mlurp For This Useful Post:
  #2 (permalink)  
Old 10-17-2017, 02:34 AM
Banned
 
Join Date: Dec 2011
Location: Okolona
Gender: Male
Posts: 2,220
Thanks: 1,645
Thanked 607 Times in 520 Posts
Lightbulb Re: The Neutron Star Cooling Mystery

UPDATE:

Astronomers witness neutron stars colliding...

New frontier for science as astronomers witness neutron stars colliding
16 Oct.`17 - Extraordinary event has been ‘seen’ for the first time, in both gravitational waves and light – ending decades-old debate about where gold comes from
Quote:
The collision of a pair of neutron stars, marked by ripples through the fabric of space-time and a flash brighter than a billion suns, has been witnessed for the first time in the most intensely observed astronomical event to date. The extraordinary sequence, in which the two ultra-dense stars spiralled inwards, violently collided and, in all likelihood, immediately collapsed into a black hole, was first picked up by the US-based Laser Interferometer Gravitational-Wave Observatory (Ligo).

As its twin detectors, in Louisiana and Washington state, picked up tremors in space-time that had spilled out from the merger 130m light years away, an alert went out to astronomers across the globe. Within hours, 70 space- and ground-based telescopes swivelled to observe the red-tinged afterglow, making it the first cosmic event to be “seen” in both gravitational waves and light. Dave Reitze, executive director of Ligo, said: “What is amazing about this discovery is it is the first time we’ve got a full picture of one of the most violent, cataclysmic events in the universe. This is the most intense observational campaign there has ever been.”

Einstein first predicted the existence of gravitational waves a century ago, but the first experimental proof that space itself can be stretched and squeezed took until 2015, when Ligo scientists detected a collision of black holes. But this dark merger, and the three detected since, were invisible to conventional telescopes. As the stars collided, they emitted an intense beam of gamma rays and the sky was showered with heavy elements, resolving a decades-old debate about where gold and platinum come from.

Neutron stars are the smallest, densest stars known to exist: about 12 miles wide, with a teaspoon of neutron star material having a mass of about a billion tons. The core is a soup of pure neutrons, while the crust is smooth, solid and 10 billion times stronger than steel. The 100-second hum picked up by Ligo told the story of how the two stars, each slightly heavier than the sun, approached their death. Initially separated by 200 miles, they circled each other 30 times a second. As they whirled inwards, accelerating to 2,000 orbits each second, the signal rose in pitch like a slide whistle.

MORE
Reply With Quote
  #3 (permalink)  
Old 10-18-2017, 03:39 AM
Banned
 
Join Date: Dec 2011
Location: Okolona
Gender: Male
Posts: 2,220
Thanks: 1,645
Thanked 607 Times in 520 Posts
Cool Re: The Neutron Star Cooling Mystery

Einstein proven right again...

Neutron star collision has changed our understanding of universe: scientists
Wed, Oct 18, 2017 - THEORY PROVED: The observation of the collision is another feather in the cap for Albert Einstein, who predicted gravitational waves more than 100 years ago
Quote:
For the first time, scientists have witnessed the cataclysmic crash of two ultra-dense neutron stars in a galaxy far away and concluded that such impacts forged at least half the gold in the universe. Shock waves and light flashes from the collision traveled about 130 million light-years to be captured by detectors on Earth on Aug. 17, excited teams revealed at news conferences held around the globe on Monday as a dozen related science papers were published in top academic journals. “We witnessed history unfolding in front of our eyes: two neutron stars drawing closer, closer ... turning faster and faster around each other, then colliding and scattering debris all over the place,” joint discoverer Benoit Mours of France’s CNRS research institute said. The groundbreaking observation solved a number of physics riddles and sent ripples of excitement through the scientific community.

Most jaw-dropping for many, the data finally revealed where much of the gold, platinum, uranium, mercury and other heavy elements in the universe come from. Telescopes saw evidence of newly-forged material in the fallout, the teams said — a source long suspected, now confirmed. “It makes it quite clear that a significant fraction, maybe half, maybe more, of the heavy elements in the universe are actually produced by this kind of collision,” said physicist Patrick Sutton, a member of the US-based Laser Interferometer Gravitational-Wave Observatory (LIGO), which contributed to the find. Neutron stars are the condensed, burnt-out cores that remain when massive stars run out of fuel, blow up and die. Typically about 20km in diameter, but with more mass than the sun, they are highly radioactive and ultra-dense — a handful of material from one weighs as much as Mount Everest.


An undated illustration provided by the National Science Foundation shows an artist’s impression of two merging neutron stars.

It had been theorized that mergers of two such exotic bodies would create ripples in the fabric of space-time known as gravitational waves, as well as flashes of high-energy radiation called gamma ray bursts. On Aug. 17, detectors witnessed both phenomena, 1.7 seconds apart, coming from the same spot in the constellation of Hydra. “It was clear to us within minutes that we had a binary neutron star detection,” said David Shoemaker, another member of LIGO, which has detectors in Livingston, Louisiana, and Hanford, Washington. “The signals were much too beautiful to be anything but that.” The observation was the fruit of years of labor by thousands of scientists.

Along with LIGO, they include teams from Europe’s Virgo gravitational wave detector in Italy, and a number of ground and space-based telescopes, including NASA’s Hubble. “This event marks a turning point in observational astronomy and will lead to a treasure trove of scientific results,” said Bangalore Sathyaprakash from Cardiff University’s School of Physics and Astronomy, recalling “the most exciting [discovery] of my scientific life.” “It is tremendously exciting to experience a rare event that transforms our understanding of the workings of the universe,” added France Cordova, director of the National Science Foundation, which funds LIGO. The detection is another feather in the cap for physicist Albert Einstein, who predicted gravitational waves more than 100 years ago. Three LIGO pioneers — Barry Barish, Kip Thorne and Rainer Weiss — were awarded the Nobel Prize in Physics this month for the observation of gravitational waves, without which the latest discovery would not have been possible.

MORE
Reply With Quote
The Following User Says Thank You to waltky For This Useful Post:
  #4 (permalink)  
Old 02-25-2018, 05:01 PM
mr wonder's Avatar
PW Enlightenment
 
Join Date: Mar 2011
Location: Virginia
Gender: Male
Posts: 10,197
Thanks: 9,302
Thanked 5,535 Times in 3,743 Posts
Default Re: The Neutron Star Cooling Mystery

hmmm...

must read more
__________________
Hope is the dream of the waking man.
Aristotle

For there is hope of a tree, if it be cut down, that it will sprout again, and that the tender branch thereof will not cease.
Job 14:6-8
Reply With Quote
  #5 (permalink)  
Old 03-03-2018, 09:48 AM
mlurp's Avatar
PW Enlightenment
 
Join Date: Mar 2008
Location: Flatlands
Gender: Male
Posts: 37,087
Thanks: 18,638
Thanked 10,740 Times in 8,372 Posts
Default Re: The Neutron Star Cooling Mystery

Quote:
Originally Posted by mr wonder View Post
hmmm...

must read more


Some report were interesting...

https://www.bing.com/search?q=neutro...=en-US&PC=LCTS
__________________



_ ... _ Improvise - Adapt - Over Come ... _ ...
Reply With Quote
The Following User Says Thank You to mlurp For This Useful Post:
Reply

Tags
cooling, mystery, neutron, star, the

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 04:25 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

Content Relevant URLs by vBSEO 3.2.0