NASA | Fermi Catches a 'Transformer' Pulsar
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- čas přidán 21. 07. 2014
- In late June 2013, an exceptional binary system containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope.
The system, known as AY Sextantis, is located about 4,400 light-years away in the constellation Sextans. It pairs a 1.7-millisecond pulsar named PSR J1023+0038 -- J1023 for short -- with a star containing about one-fifth the mass of the sun. The stars complete an orbit in only 4.8 hours, which places them so close together that the pulsar will gradually evaporate its companion.
To better understand J1023's spin and orbital evolution, the system was routinely monitored in radio. These observations revealed that the pulsar's radio signal had turned off and prompted the search for an associated change in its gamma-ray properties.
What's happening, astronomers say, are the last sputtering throes of the pulsar spin-up process. Researchers regard the system as a unique laboratory for understanding how millisecond pulsars form and for studying details of how accretion takes place on neutron stars.
In J1023, the stars are close enough that a stream of gas flows from the sun-like star toward the pulsar. The pulsar's rapid rotation and intense magnetic field are responsible for both the radio beam and its powerful pulsar wind. When the radio beam is detectable, the pulsar wind holds back the companion's gas stream, preventing it from approaching too closely.
But now and then the stream surges, pushing its way closer to the pulsar and establishing an accretion disk. When gas from the disk falls to an altitude of about 50 miles (80 km), processes involved in creating the radio beam are either shut down or, more likely, obscured. Some of the gas may be accelerated outward at nearly the speed of light, forming dual particle jets firing in opposite directions. Shock waves within and along the periphery of these jets are a likely source of the bright gamma-ray emission detected by Fermi.
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![Eminem - Houdini [Official Music Video]](http://i.ytimg.com/vi/22tVWwmTie8/mqdefault.jpg)
This is yet another reason I love astronomy. Thankful that NASA Goddard has its own channel.
For rreeaall
Yeah!
I can watch stuff like this all day long
Michael Bay can't wait to get one of these into his next movie.
Thoroughly intriguing. The universe is awesome !!!!!
I am so glad I discovered Universe Today on my phone since I have missed all the good astronomy stuff and NASA since I lost internet on my computer (Windows xp). Being more of an astronomy tourist than anything else. I'm not very good at all the techno stuff. Thank you NASA.
I thought I was hearing mass effect soundtrack.
Fascinating
Sweeet!!, thank you NASA, peace and love, Doug.
Great man.
Wish I could fly or work for NASA
Golly! The universe is an awesome work of art.
Of photoshop 😂😂
Fluck that was intense.
soo cool!!!!
the phases probably come from the star having an elliptical orbit so when the star gets close enough the pulsar steals gas from the star then when the stars orbit goes further from the pulsar the gravity isn't enough to steal gas from the star only just blowing it away
Pretty cool
An eliptical orbit that grazes the stress threshold of the companion's atmosphere may be the reason for the blockage of radio waves until the orbit has the material cleared through either falling onto the star or being electromagnetically sorted by the charge of the highly influential magnetic field of the pulsar itself. An atmosphere of a superconductive material will be less affected than a polarized ion or atom of a charged element or a polarized elemental particle. Gama rays are strong enough to punch through a polarized elemental cloud of particles, but the radio pulses may actually be conducted directly by a superconductive surface of the neutron star if it get's shorted into a pulse that grounds out immediately at the poles.
This would make a pulse in the gama-ray burst itself in changing enegy levels when it was superconducted or resisted, causing a higher level of gama-ray burst or a higher temperature of the nebula cloud enveloping the pulsar. Either mechanism would eventually cause added momentum to be accumulated in the act of pulling the matter into the surface at an accellerated pace in addition to gravity, but electromagnetically, like a huge hadron collider, creating heavier and stronger forms of radiation, that span into the microwave, x-ray and gama-ray energy emissions; I can't get close enough to map the electromagnetic lines of force inside a neutron star, but I suspect they are phenominally mind boggling in their strengths locally.
this is absolutely crazy ...
Interesting and amazing
Wow cool
that music tho
Eyyy. lol. Real talk
I have no idea why I knew this before and I love green, yellow and violet colors
May it be just a silly thought, but...having a third star in the system would counter the neutron star's gravitational pull temporarily while passing opposite the neutron star and close to the sunlike one. As the mass between the neutron star and the sunlike isn't too different, the pull of a third one could affect the pair significantly.
Wow
So really the switch in modes is just the time it takes for the neutron star to chew the other star.
Yes, two gases compound created or creating by this method.
it makes sense that as the neutron star collects gas and increases its spin, its magnetic field would increase in strength, which would then push away the material from its companion star. After the material is no longer in an accretion disk, the neutron star's magnetic field would slow down the star's spin, and therefore the field, allowing for the gas to collect again.
"closely" is not the word I would use when observing something from 4.4k ly away :)
"Word" is not the word I would use to describe two words.
inSpihr
epic burns
inSpihr closely was the word i was talking about... but ok I see your point... thank you for the awesomeness you're making me aspire to.
Pure conjecture.
Reverse ionization ? 🤔 maybe during polarity reversal ?
That's -really- cool stuff. Why didn't I take astronomy...
¡¡Realmente impresionante y fascinante!!
Sextans is my favorite
Pueden hacer el videos pero con audio en ESPAÑOL please
forward spin of the companion star is decelerating back side is accelerating.. as to not digesting the star in one go? seeing the pinch point would be on the back side of the orbiting companion.. its shape constantly gets pushed forward out of the rest it has found.. creating a rotation around its own orbit at this point? allowing it to migrate away in orbit.. the pulses in gamma could very well be the pinch in the wobble?
but than the pulse would be delayed in timing.. and take longer and longer.. but than again math has a funny way of balancing the natural world when it comes to ratios
but than again.. if its acting like a stopper to a disk that has grown outward and is increasing in density. you may just find that a overflow actually changes the axis of the companion..
I just can not see a nice orbit that decays and than expands in such a violent system.. figure eights.. lossing a orbital period.. being pushed off of a orbital plane.. sounds more like it
just the shape the companion would assume.. seeing in one orbit that would continually move towards the pull. we need to know the rotaional speed of the companion.. something tells me it changes.. as so far as going retro.
im more interested in the companion star now. ty
Sweet, looks tasty
Is it possible, even if remotely, that that binary companion, by losing enough mass, will lose its ability to periodically resist the pulsar, and therefore SUDDENLY COLLIDE INTO THAT PULSAR PRODUCING AN ODD SUPERNOVA?
Probably the different phases are caused by the aphelion and perihelion of the orbit of the star.
I realise that this may sound pedantic but, when it comes to science, precision is key:
Apoapsis & periapsis, not aphelion and perihelion. "Helio" refers to OUR sun.
how does a pulsere win when a nutron star is heavier and more dense?
No a pulsar and neutron star are simular.
a neutron and pulsar are very similar, except a pulsar spins much, much faster.
Lillian Banda Pulsars are types of Neutron Stars
wishing to be travel tour sponsored to see again w/ my father who is now a senior citizen for the second time his eversince wayback travel der in 1982 = the launching rocket pad of NASA Kennedy Space Center,Orlando Florida U.S.A.! many tnx! nevertheless to say its only a dream!
Naruto at the end of Shippuden be like
they havnt observed the transformation in progress..hmmm...
do one of Uranus
the pulsar is now a black hole
Couldn't a type 1a supernova result from this?
Any Old Biscuit no only white dwarves makes type 1a supernovas
Weed Beer What if neutron stars have a critical mass, though?
Any Old Biscuit they have
So then a type 1a supernova could result.
Any Old Biscuit no it will just shrink into a black hole and release gamma rays
!
I suggest that before you make any more fancy graphics, you find out what is really happening in this interaction.
🎵🌌⌛
Transcripts from a sonic eonic
We provide the universe with valuable information about how life in some signature arrangement so that it an update, if it chooses to, the system's evidence to conform to it. We're gods, So shut up and start living like one.
that stream of gas is just damn beautiful. i kinda sorta made my own model of it in my own videos. I'll have to add some kind of mist effect. It's only my impression czcams.com/video/JaLmfgkla2w/video.html
Isn't this similar to how a Sun dies ???? It just sucks up everything into a neutron star or something like that ???????????? ............ IDK
sun is gonna be a white dwarf less stronger dan neutron
Eez Madness I see , thx x3
It's something that Warner Brothers has never attacked him and we can understand why with Batman kids Batman should had kids suddenly he's in his right and then he needs these for kids he does not know that he's a father to these children their ages and somehow he women that he was dating Sonic came forward and told him these your kids first he's upset mixed up mad all confusion at once then after he process it he comes down and start to get to know his children that he never raised now you can understand why still bringing more fans for Batman new Once upgraded to a new level
.
transformers robots in discuise
Who easel is here in 2021
is the wedding of two stars
I only came here when i saw "Transformer signal".
wrong
turn that stupid music off , please
Amazing what God made for us to witness.
we are tired of yur computer generated images. Just take the real pictures and show them to the world. its discouraging that people needs to use their imagination for us to see something cool from NASA. You guys are so boring. i guess thats you want.
oh silly, you cant view a pulsar in atelescope in a 4,004 light years away
you can detect them by an infrared telescope but you cant pan in it