Saw this review of a paper today ( https://www.eurekalert.org/pub_relea...-fsi062817.php )
NOTE: the link in the article to to the paper is invalid, use https://academic.oup.com/mnras/artic...3/mnras/stx848
Summary: Data analysis of hypervelocity stars correlated with the orbit of the Large Magellenic Cloud (LMC) indicate this stars are more likely to have originated with the cloud and inherited a large component of their velocity as observed in the Milky Way from that satellite galaxy's orbit. This offers a more plausible explanation of their origin (previous explanations implied what appeared to be somewhat rare sources and conditions) and is consistent with a locality which appears to be isolated to a few constellations.
While the study itself is interesting in and of itself, in terms of the debates that tend to rage here on TWEB, it is significant in that:
1) This is an example of the DATA driving the conclusion. Nobody made up the fact these stars have a velocity that is hard to explain, nobody forced the stars to tend to be found in certain constellations, nobody made the physics of alternative explanations unlikely.
2) This is an example of a state with implications for a history of the universe that must be measured in millions of years, not thousands. The LMC is hundreds of thousands of light years away. Even at the hyper velocity of these stars (>500km/s = .0016c), this implies around 96 million years for these stars to cross from the LMC into the Milky way assuming its current distance of ~160,000 ly.
3) to explain this sort of thing in a young universe (i.e. YEC's 6 to 10,000 years) requires the theologically troublesome assumption God created the universe with a 'pretend' history* - one that didn't actually happen, but one for which the current state of the universe is 100% consistent.
Jim
*or the introduction of 'special physics' a la Humphrey's WHC
NOTE: the link in the article to to the paper is invalid, use https://academic.oup.com/mnras/artic...3/mnras/stx848
Summary: Data analysis of hypervelocity stars correlated with the orbit of the Large Magellenic Cloud (LMC) indicate this stars are more likely to have originated with the cloud and inherited a large component of their velocity as observed in the Milky Way from that satellite galaxy's orbit. This offers a more plausible explanation of their origin (previous explanations implied what appeared to be somewhat rare sources and conditions) and is consistent with a locality which appears to be isolated to a few constellations.
While the study itself is interesting in and of itself, in terms of the debates that tend to rage here on TWEB, it is significant in that:
1) This is an example of the DATA driving the conclusion. Nobody made up the fact these stars have a velocity that is hard to explain, nobody forced the stars to tend to be found in certain constellations, nobody made the physics of alternative explanations unlikely.
2) This is an example of a state with implications for a history of the universe that must be measured in millions of years, not thousands. The LMC is hundreds of thousands of light years away. Even at the hyper velocity of these stars (>500km/s = .0016c), this implies around 96 million years for these stars to cross from the LMC into the Milky way assuming its current distance of ~160,000 ly.
3) to explain this sort of thing in a young universe (i.e. YEC's 6 to 10,000 years) requires the theologically troublesome assumption God created the universe with a 'pretend' history* - one that didn't actually happen, but one for which the current state of the universe is 100% consistent.
Jim
*or the introduction of 'special physics' a la Humphrey's WHC
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