Researchers Intercept Covert Signal Born Due to 'Exotic Phenomena' at Very Heart of Milky Way

erek

[H]F Junkie
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Is it the Soviets or the Communist Chinese? Who is it?

"Time Variations in the Flux Density of Sgr A* at 230 GHz Detected with ALMA. A radio source at the Galactic center Sgr A* is a prime supermassive black hole candidate and therefore key to developing our understanding of them. Time variations in the 230 GHz band flux of Sgr A* have been found with the Atacama Large Millimeter/submillimeter Array Cycle 5 observations. Measuring the flux density of Sgr A* in 1 minute snapshots at 217.5, 219.5, and 234.0 GHz, we obtained light curves for ten 70 minute periods. The light curves show variations at a few tens of minutes and hourly scales. The shorter timescale is similar to the orbital period of the innermost stable circular orbit around a 4 × 106 M ☉ black hole, suggesting that the variation originates from the immediate vicinity of Sgr A*. We also detected no time lag between 217.5 and 234.0 GHz and a dependence of the spectral index on the flux density."

https://sputniknews.com/science/202...-exotic-phenomena-at-very-heart-of-milky-way/
 
Which will happen first: the Milky Way spiraling to death into the MBH at the center, or the Milky Way colliding with another galaxy?

There's plenty of time for either to happen. To put the vastness into perspective:
The closest star to our Solar system, Alpha Centauri A, is but a mere 25.3 trillion miles away and it takes 4.3 years for its light to reach Earth.
Our galaxy is roughly 106,000 light years in diameter.
Icarus, the furthest star observed by Hubble with the assistance of gravitational lensing, is 9 billion light years away.
Voyager I, launched in 1977, is almost 14 billion miles into it's journey away from our planet.

As for these radio signals? Well, stay tuned...
 
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Sag A is just eating and spewing and something, probably a big ass rock or another star is orbiting at velocities high enoug lh to orbit every 70 mins causing a ripple in the continuous flow of black hole jizz basically.
 
Why do I feel like reading some tabloid-garbage edition of scientific data, spun to far for reality to follow.
Astonomy is AWESOME, drop the tinfoil hat "suggestions" *sigh*
 
That is some garbage ass journalism, but considering the name of the source, it makes sense.
 
It's never aliens.

In any case no life could survive that close to the center of the galaxy so it's a moot point. It's a bath of cosmic radiation as well as comprising a black hole four million solar masses. It is interesting in that it may give them new ideas into the study of black holes which are still a huge mystery. The fact there seem to be two vastly different types (regular and super massive) is a huge mystery by itself.

The last paragraph is where the article goes off the rails. FRBs have been known much longer than "recent". Some years ago they hypothesized it was due to magnetar quakes where they drop to a lower energy state. That idea has held up since (a magnetar is a type of neutron star that is magnetically intense and spins extremely fast, most scary object in space short of a black hole).
 
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Which will happen first: the Milky Way spiraling to death into the MBH at the center, or the Milky Way colliding with another galaxy?

There's plenty of time for either to happen. To put the vastness into perspective:
Ummm actually there's not. The former won't happen. Black holes are not magical suck demons in the Universe. They are 'objects' with a particular mass and a gravity associated with that mass, most everything in the Milky way is already in a stable orbit around the center of mass of the galaxy, which is way more massive than the SMBH at the center, so we're going to continuing not spiraling into the galaxy's center unless said other galaxy gets near by and drastically disrupts our orbit to have us go into the SMBH.
 
...so we're going to continuing not spiraling into the galaxy's center unless said other galaxy gets near by and drastically disrupts our orbit to have us go into the SMBH

Which is actually going to happen in about three billion years. We're on a collision course with Andromeda which in terms of mass is about twice as big as the Milky Way. Stars will not collide since there's so much space between, but the structure of the galaxy will completely change and the black holes at their centers will eventually merge. We could possibly witness it if we end up on one of the tails that get flung out, but the solar system could also end up careening into the center or out of the galaxy entirely.

Galaxies will die eventually though. The prevailing theory about the end of universe is the big freeze where everything just keeps expanding until there's no other galaxies left visible. If you were able to live some trillions of years to witness it, everything would just get dimmer and dimmer until the galaxy would be nothing but black holes. Eventually those would dissipate due to Hawking radiation and you're left with a cold dark empty universe short of some imperceptible radiation.

There was a hypothesis of a Big Rip which is a more interesting death of the universe, but it depends on the proportional increase of Dark Energy as the universe expands. Recently it was found that Dark Energy increases linearly with the expansion which put the Big Rip out of contention, but that was a pretty wild idea on the death of the universe, total destruction. I actually like that one better. The Big Crunch is the most appealing one making the universe cyclic, but unfortunately Dark Energy threw that one off the table quite a long time ago.
 
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Which is actually going to happen in about three billion years. We're on a collision course with Andromeda
Maybe... we know there us some component of velocity towards us via blue shifting of light. But we dont know how fast it is moving perpendicular to that as the movement is on scales undetectable to us since there is no fancy method like Doppler shifting in those directions. Astrometry is not going to work on distant scales that large
 
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