You could read the paper to see their argument.
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
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Sol is a binary star system
Re: Sol is a binary star system
by Keith_McClary » Wed 16 Dec 2015, 19:52:41
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Re: Sol is a binary star system
by Outcast_Searcher » Wed 16 Dec 2015, 22:32:05
$this->bbcode_second_pass_quote('Keith_McClary', 'Y')ou could read the paper to see their argument.
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
For those who aren't deeply into astronomy, an ETNO is an Extreme Trans_Neptunian object. (In English, a minor planet (i.e. like Pluto) in the solar system, which orbits the sun at an average distance greater than Neptune. Pluto was the first such object discovered).
https://en.wikipedia.org/wiki/Trans-Neptunian_object
Sorry if this was obvious to everyone but me, but as a layman, I find such papers challenging to fully grok, when they're outside my narrow area of expertise. Clearly given the apparent size (the amount of sky it currently covers up), if it's a lot further away, it's got to be a much bigger object.
Given the track record of the perma-doomer blogs, I wouldn't bet a fast crash doomer's money on their predictions.
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Re: Sol is a binary star system
by Sixstrings » Wed 16 Dec 2015, 23:31:56
$this->bbcode_second_pass_quote('Keith_McClary', 'Y')ou could read the paper to see their argument.
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
Okay, so there's two objects -- one is an asteroid -- but one is NOT an asteroid.
It's something "super earth" sized.
Something that large cannot be an asteroid -- it would be spherical, from the pressure of its own gravity. A big ball of something rocky, which is what a "super earth" is.
Or a brown dwarf, potentially.
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Re: Sol is a binary star system
by Keith_McClary » Thu 17 Dec 2015, 01:43:48
$this->bbcode_second_pass_quote('Outcast_Searcher', '')$this->bbcode_second_pass_quote('Keith_McClary', 'Y')ou could read the paper to see their argument.
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
http://arxiv.org/pdf/1512.02652v1.pdf
They eliminated various possibilities and all that was left were "an ETNO ( 100 AU), a hypothesized Super-Earth (∼ 300 AU) or a super-cool brown dwarf (∼ 20 000 AU)".
For those who aren't deeply into astronomy, an ETNO is an Extreme Trans_Neptunian object. (In English, a minor planet (i.e. like Pluto) in the solar system, which orbits the sun at an average distance greater than Neptune. Pluto was the first such object discovered).
https://en.wikipedia.org/wiki/Trans-Neptunian_object
Sorry if this was obvious to everyone but me, but as a layman, I find such papers challenging to fully grok, when they're outside my narrow area of expertise. Clearly given the apparent size (the amount of sky it currently covers up), if it's a lot further away, it's got to be a much bigger object.
Even without knowing much, you can see how they are just going through a process of elimination to end up with with a short list of possible objects. The "apparent size" is zero - the submillimeter Array can't resolve them at the assumed distances.
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