OJ - 287 A binary black hole system.

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 Artistic illustration of OJ287 as a binary black hole system. The secondary black hole of 150 million solar masses moves around the primary black hole of 18 billion solar masses. A disk of gas surrounds the latter. The secondary black hole is forced to impact on the accretion disk twice during its 12-year orbit. The impact produces a blue flash which was detected in February 2022. In addition, the impact also induces the secondary black hole to bright bursts of radiation several weeks earlier, and these bursts have also been detected as a direct signal from the secondary black hole. CREDIT AAS 2018

    Have you ever heard of binary star system? This is an astronomical phenomenon where two stars enter a gravitational orbit in which they are each other's focal point, causing them to orbit each other in a clean unison. This dance leads to both stars spinning around each other forming a binary system. This binary form can contain upwards of two stars, however, can be applied to other celestial objects. Now, imagine for a moment, a black hole. An incredibly astronomically dense object that has collapsed on its own weight, and formed a body so dense, gravity and light now obey the black hole. This object is so dense it gravitationally attracts everything in its surroundings, this includes planets, stars, cosmic dust, you name it. They are so dense that if the circumstances are right, other black holes can even pulled in, and If the circumstances are just perfect, this can lead to black hole orbiting another black hole. This unison can lead to the application of the binary system and create, a binary black hole system. This system is OJ -287.


    While not the only system of its kind, OJ - 287 is two black holes about 4 billion light years from us. Containing OJ - 287 A, which is the larger Blazar, and OJ - 287 B, which is a smaller supermassive black hole.  OJ - 287 A, is a Blazar, a Supermassive black hole constantly spewing particles and gamma radiation from the relativistic jets that have formed above and below the black hole, these jets are particles and matter that were pulled in by the black hole but miss the mark just barely and get accelerated to incredibly high speeds above and below the black hole, thus forming that vortex like jet state. These jets when observed from earth can either be pointing up and down from our perspective and be classified as quasars, or pointed at us, causing particles and radiation to be sent our way from however far way they are. This classification is called a Blazar. OJ - 287 A, just happens to be pointed at us, as its jets throw tons of particles and radiation in our direction. these particles can also be detected by some of our astronomical instruments albeit faint depending on the distance. It also houses an accretion disk, a formation of superheated matter that the black hole has attracted and begun absorbing. Since black holes attract so, so much matter, it takes time to consume it all, any matter that is attracted can begin to orbit in a very very close orbit around the black hole, causing it all to collide and rub together. These collisions along with the incredibly high near light speed speeds cause the matter to form a glowing red-hot disk around the black hole.


    The other black hole OJ - 287 B is just a regular supermassive black hole, while still devastating in its own right, it absorbs matter in a different manner than typical, and does have its own jets, albeit much smaller and usually drowned out by OJ - 287 A's jets. OJ - 287 B's orbital path is very thin, with an eccentricity (How stretched a bodies orbit is, ranging from 0 - 1) of 0.65, causing  OJ - 287 B's orbit to be quite eliptical, this orbit is how this system was found in the first place, along with the later associated radiation signals. As the smaller black orbits the larger, it crashed through the larger black holes accretion disk, and since accretion disks are made of superheated matter, began a reaction causing the smaller black hole to begin absorbing the matter inside the disk, cause a flash of light a trillion times brighter than our sun. This small siphon of energy happens generally every twelve years are predicted by several confirmed events ranging from 1983 - 2022, in which several flares were predicted with an uncertainty 4 hours of the actual event. 


    The attached video is a simulation run by NASA with data from the Spitzer space telescope showcasing the orbit of OJ - 287 B, with the relativistic jets removed for visual clarity.


    These kinds of systems are a great reminder of just how unimaginable the scope of the cosmos is. Just when you think the universe is out of tricks, its finds a new way to challenge our theory and force us to prove that our laws do truly govern this magical body we call home.


Sources :

https://www.aanda.org/articles/aa/full_html/2026/01/aa55831-25/aa55831-25.html

https://spacenews.com/first-detection-of-secondary-supermassive-black-hole-in-a-well-known-binary-system/ (Binary black hole image)

https://science.nasa.gov/photojournal/animation-of-black-hole-disk-flare-in-oj-287/

https://svs.gsfc.nasa.gov/20281/

https://en.wikipedia.org/wiki/OJ_287

https://nustar.caltech.edu/page/relativistic-jets

https://youtu.be/HBE8qBtQMuA?si=ynaK6VJg85hsnqmg&t=15  (Direct link to the attached video)


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