One stellar nursery is not the same as another - location! location! location!
Interesting new study blows our star formation theories apart - mass distribution of stellar cores in different locations in the Milky Way is... different.
I'm wondering if the abundances of elements play a role in how stellar cores turn into stars, since stellar formation rates do depend on chemical composition. Who knows about this?
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Not my field...but... I want to know how all this impacts planet formation and composition. ???
AstroLou
Level 5
May 2, 2018
2
... which leads to the potential for development of life!
@LaMariposa Yes! And then, Agnostics!! ? OK, Here's one for you... I'm reading that SNRs depleted in phosphorus have been observed. Phosphorus is necessary for life on Earth and is produced in the SNR explosion. So, what variables influence its presence?
SNRsThis is a subject I researched in conjunction with a counter-creationism project. (The project details frequently brand me AS a creationist when not tagging me as a blaspheming spawn of Satan consigned to eternity in Hell, but this has no effect on the cosmology research.) I note that the paper did not discuss the age of what was being observed. As of about 2006, we had a Population III (oldest), II, and I (today) model. Pop III stars were to old to be observed now, but were inferred by the rules of how hydrogen and helium behave. The model had them coming into existence when the Universe was 600 MY old. Just recently, though, we detected evidence of what might have been a Pop III star, but at 180 MY. To date, I have not seen anyone coming up with the math to establish how a star could form at 180 MY. There is also supposed to be a "miniature galaxy" with dwarf stars at 100 MY. Star dating is still more art than science, at least at the extremes. My angle on this was when there would be sufficient metallacity in the universe for stars with solid planets and magnetospheres, and when would there be enough nitrogen to support life.
andygee
Level 7
May 2, 2018
1
Content source? I'd like to read more about this.
@LaMariposa I would love to send you the paper, but I've embargoed it for the time being. Since I failed to get it into peer review, I folded most of the pertinent stuff into a science fiction novel I was working on concurrently. That book is due out RSN and my publisher doesn't want me releasing critical portions of it pre-release. I'd be happy to send you a copy of the novel when it comes out. All of the actual research is available on the Science Direct database and much of it can be found on WIkipedia and Google, and, for the star formation part, the open exoplanet catalog is an invaluable resource.
@LaMariposa We're 6 weeks past expected launch. Publisher Time seems to be unmoored from the time most people experience.
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