TED anomaly - The most mysterious star in the universe

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Uhlume

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Free floating stellar mass blackholes don't generally have accretion disks.
The pretty much only way to spot these is when they move in front of background stars. There have been many such studies done in the milkyway in order to establish just how many stellar mass blackholes there are creeping about in the galaxy and the signal we see from this is pretty well understood. So you're right on one front, it is very unlikely to be a black hole.

If it was orbiting a star, it wouldn't be a free floating stellar mass black hole correct?
This is an irregular, but recurring pattern if I understood it correctly.

A lonely black hole zooming through the darkness between stars would indeed for all intents and purposes be invisible, unless it happened to be in the process of consuming something.
 

aitaituo

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The same goes for the alien megastructure theory. :) It is expected that a Dyson Swarm or partial Dyson Sphere would glow very strongly in infrared.
And since there is no excess of infrared light in the star's spectrum, they're kind of stuck.

My money is on a swarm of O'Neill cylinders.
 
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alphasam

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Free floating stellar mass blackholes don't generally have accretion disks.
The pretty much only way to spot these is when they move in front of background stars. There have been many such studies done in the milkyway in order to establish just how many stellar mass blackholes there are creeping about in the galaxy and the signal we see from this is pretty well understood. So you're right on one front, it is very unlikely to be a black hole.

^^And even if it were a foreground black hole passing by it would "transit" rapidly, it wouldn't take days as we see in the curve and would not reappear hundreds of days later.

If it was orbiting a star, it wouldn't be a free floating stellar mass black hole correct?
This is an irregular, but recurring pattern if I understood it correctly.

A lonely black hole zooming through the darkness between stars would indeed for all intents and purposes be invisible, unless it happened to be in the process of consuming something.

Problem is if it were orbiting the star in question it would recur regularly. But even then as mentioned before it would not produce the lightcurve we see anyway. If it were not feeding we wouldn't see anything, if it were feeding it would most definitely be bright in the Infrared.
 
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Daetrin

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No problem, I'm happy so many people are interested in it! :) The whole reason we took part in the project is to find interesting things the computer algorithms missed.

It's in the hands of the professional astronomers now. Hopefully it returns in 2017.

Yeah, it'd be shame if it were like the WOW signal.
 
Mar 18, 2016
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No problem, I'm happy so many people are interested in it! :) The whole reason we took part in the project is to find interesting things the computer algorithms missed.

It's in the hands of the professional astronomers now. Hopefully it returns in 2017.

As one of the professionals (astrophysicist, not astronomer, and I'm not on that team, but still) please allow me to thank you and your team for their diligence and hard work. I hope the professional community can live up to the high bar that you've set for us.
 

S.C. Watson

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This is entirely the problem of invoking "aliens" to explain any phenomena, you could make up pretty much any excuse as for why things don't add up. You might as well say it's magic.
Right. And I think it's pretty clear that no one is invoking aliens. This is purely a what-if hypothetical, not an explanation.

[edit] - just reread your post, as I didn't catch all of it the first pass, and was just responding to the quote above (my bad - apologies).

That's fantastic, and thank you very much for all of your work. Regardless of what this is, it's truly exciting stuff! :)
 
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S.C. Watson

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Sorry I wasn't meaning to say you were, I was just adding a point about falsifiability and why professional scientists prefer to look at falsifiable explanations.
No worries. I wasn't sure, and just wanted to clear that I wasn't saying it was! I mean, I'd personally love it to be, but I'll be happy with a comet swarm or any other natural phenomena because of how weird it is. :)
 

alphasam

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I'm not convinced by the comet swarm either but it is the best we've got at the moment, and research done by other teams since has at least helped to make it the favoured idea. Don't get me wrong i'd love it to be aliens, but it's very very unlikely. And there is nothing about the lightcurve that suggests it is anything to do with aliens either, other than the fact we have no good natural explanation right now. The universe is full of natural wonders.

Btw if you are interested here is the talk thread on Planethunters.org that details how we found it, i'm planetsam.

https://talk.planethunters.org/#/boards/BPH0000006/discussions/DPH0000xam
 
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Lamahorse

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Could a star recently ingesting a particularly large planet for example, cause some dimming of the star?
 
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Does the known physics of stars completely rule out the decrease being some kind of unstable decrease in the star's output, rather than a partial occlusion?

Stars sometimes get dimmer and brighter; however they almost always do it on an extremely regular, predictable cycle because it's almost always due to them rotating. Here we saw a star get dimmer and brighter unpredictably and irregularly, which is weird and part of why they think it's not just a single object.

Stars also evolve and so change their luminosity, but not on this timescale.

What we're seeing here is, as you put it, pretty much ruled out as being just stars being stars.
 

Murmeldjuret

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There is a reason KIC 8462852 is the first mission for James Webb Space Telescope. This is like the fourth time KIC 8462852 is discussed on this forum, indicating it is very interesting if nothing else :D