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Thursday, 25 February 2016

LIGO'S TWIN BLACK HOLES MIGHT HAVE BEEN BORN INSIDE A SINGLE STAR - February 23, 2016

WHEN WHOLE WORLD IS CELEBRATING THE SUCCESS OF EINSTEIN ON RECEIVING THE GRAVITATIONAL WAVE. 

I HAVE RAISED SOME POINTS ON 18TH, FEB.’2016  IN MY BLOG 


What if Gravitational wave is not due the fast spinning of two black hole [as seems & claimed] ….




1.  “New research suggests that the two black holes might have resided inside a single, massive star whose death generated the gamma-ray                   burst.

2nd OPINION: 

I think we are confused again. What is black hole? What is Galactic core? How they are related ?

The two black hole are sub-holes seen only in the particular phase of larger Galactic core – periodically. They are created by …. [at least NOT FROM SINGLE BLACK HOLE – as claimed in this paper].

So, in my view BLACK HOLE is the combined effect of these two.

The two INFANT BLACK can MERGE but two  JUVENILE or MATURE black hole NOT. It happen only when the plane of two different galaxies are in particular position – which is rare.

Here I also want to point out that Black hole does not means that there is nothing [hollow passage] in the middle of it.

Here in this case ‘there is  NO DEATH of MASSIVE STARS, it may be the case of FRIENDSHIP which is the phase of life of Galactic core.

Reference:

My comment 1(b) & 1(c) dated 24th, Jan.’2016 on “Birth of high mass stars & the origin of life" – Dec. 29, 2015”



2.  “It's the cosmic equivalent of a pregnant woman carrying twins inside her belly," says Harvard astrophysicist Avi Loeb of the Harvard Smithsonian Center for Astrophysics

2nd OPINION: 

AGREED. But twins are not developed in mother’s uterus, it is implanted there by certain condition. Again -Black holes is the effect.


3.  “Normally, when a massive star reaches the end of its life, its core collapses into a single black hole. But if the star was spinning very rapidly, its core might stretch into a dumbbell shape and fragment into two clumps, each forming its own black hole”. 

2nd OPINION:

For 1st part I also AGREED. But, the reason behind the formation of two black hole from one is not true. I am fully DISAGREE. The reason is different


4.   “A very massive star as needed here often forms out of the merger of two smaller stars. And since the stars would have revolved around each other faster and faster as they spiraled together, the resulting merged star would be expected to spin very quickly

2nd OPINION: 

I also AGREED. But SPIN is very important. Please refer my comment dated 13th & 20th , June’ 2013



5.   “After the black hole pair formed, the star's outer envelope rushed inward toward them. In order to power both the gravitational wave event and the gamma-ray burst”.

2nd OPINION:  

OUTER envelope, but of  WHAT? And HOW? How gravitational wave really formed? HOW & WHY it is in wave form?  WHY its amplitude INCREASES near Earth? WHY Gravitational wave reach before gamma rays?


6.  “The newly formed single black hole then fed on the in falling matter, consuming up to a Sun's worth of material every second and powering jets of matter that blasted outward to create the burst.”

2nd OPINION:  

But not  so easy. INFORMATION LOSS is not taking place. Blasting outward is not followed immediately after FEEDING. It depends on the …………


7.  "Even if the Fermi detection is a false alarm, future LIGO events should be monitored for accompanying light irrespective of whether they originate from black hole mergers. Nature can always surprise us," says Loeb.

2nd OPINION: 

Gravitational wave not only originate in GALACTIC CORE, but also during SUPERNOVA blast & …….  But intensities are different.



1.  STUDY EXPLAINS DECADES OF BLACK HOLE OBSERVATIONS


2.  ”HE FABRIC OF SPACE AND TIME IS IN TURMOIL” – MORE ON STEPHEN HAWKING’S BLACK HOLE UPDATE
  

3.   OUT OF BOX THINKING IS ESSENTIAL IN BASIC SCIENCE

 

 


On September 14, 2015, the Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves from the merger of two black holes 29 and 36 times the mass of the Sun. Such an event is expected to be dark, but the Fermi Space Telescope detected a gamma-ray burst just a fraction of a second after LIGO's signal. New research suggests that the two black holes might have resided inside a single, massive star whose death generated the gamma-ray burst.
"It's the cosmic equivalent of a pregnant woman carrying twins inside her belly," says Harvard astrophysicist Avi Loeb of the Harvard-Smithsonian Center for Astrophysics (CfA).
Normally, when a massive star reaches the end of its life, its core collapses into a single black hole. But if the star was spinning very rapidly, its core might stretch into a dumbbell shape and fragment into two clumps, each forming its own black hole.
A very massive star as needed here often forms out of the merger of two smaller stars. And since the stars would have revolved around each other faster and faster as they spiraled together, the resulting merged star would be expected to spin very quickly.
After the black hole pair formed, the star's outer envelope rushed inward toward them. In order to power both the gravitational wave event and the gamma-ray burst, the twin black holes must have been born close together, with an initial separation of order the size of the Earth, and merged within minutes. The newly formed single black hole then fed on the infalling matter, consuming up to a Sun's worth of material every second and powering jets of matter that blasted outward to create the burst.
Fermi detected the burst just 0.4 seconds after LIGO detected gravitational waves, and from the same general area of the sky. However, the European INTEGRAL gamma-ray satellite did not confirm the signal.
"Even if the Fermi detection is a false alarm, future LIGO events should be monitored for accompanying light irrespective of whether they originate from black hole mergers. Nature can always surprise us," says Loeb.
If more gamma-ray bursts are detected from gravitational wave events, they will offer a promising new method of measuring cosmic distances and the expansion of the universe. By spotting the afterglow of a gamma-ray burst and measuring its redshift, then comparing it to the independent distance measurement from LIGO, astronomers can precisely constrain the cosmological parameters. "Astrophysical black holes are much simpler than other distance indicators, such as supernovae, since they are fully defined just by their mass and spin," says Loeb.
"This is an agenda-setting paper that will likely stimulate vigorous follow-up work, in the crucial period after the initial LIGO discovery, where the challenge is to fathom its full implications. If history is any guide, the 'multi-messenger' approach advocated by Loeb, using both gravitational waves and electromagnetic radiation, again promises deeper insight into the physical nature of the remarkable LIGO source," says Volker Bromm of the University of Texas at Austin, commenting independently.
This research has been accepted for publication in The Astrophysical Journal Letters and is available online.
More information: Electromagnetic Counterparts to Black Hole Mergers Detected by LIGO, arxiv.org/abs/1602.04735
Journal reference: Astrophysical Journal Letters  



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