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?
7
Enjoy being online again!
Welcome to the community of good people who base their values on evidence and appreciate civil discourse - the social network you will enjoy.Create your free account
4 comments
Feel free to reply to any comment by clicking the "Reply" button.
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.
Recent Visitors 52
Photos 424 More
Posted by starwatcher-alThe occultation of Mars on the 7th.
Posted by starwatcher-alThe occultation of Mars on the 7th.
Posted by starwatcher-alSolar minimum was in 2019 so the sun is ramping up in flares, spots and prominences.
Posted by starwatcher-alI missed the early phases of the eclipse but the clouds mostly left during totality. All in all a great eclipse. Next one is Nov. 8-22
Posted by starwatcher-alI missed the early phases of the eclipse but the clouds mostly left during totality. All in all a great eclipse. Next one is Nov. 8-22
Posted by RobecologyFor those following the JWST.
Posted by AnonySchmoose The post-launch set-up of the new James Webb telescope has gone very well.
Posted by HumanistJohnImages taken with Stellina (80 mm): M33 Triangulum Galaxy M1 Crab Nebula NGC281 Pacman Nebula in Cassiopeia NGC 6992 Veil Nebula in Cygnus
Posted by HumanistJohnImages taken with Stellina (80 mm): M33 Triangulum Galaxy M1 Crab Nebula NGC281 Pacman Nebula in Cassiopeia NGC 6992 Veil Nebula in Cygnus
Posted by HumanistJohnImages taken with Stellina (80 mm): M33 Triangulum Galaxy M1 Crab Nebula NGC281 Pacman Nebula in Cassiopeia NGC 6992 Veil Nebula in Cygnus
Posted by HumanistJohnImages taken with Stellina (80 mm): M33 Triangulum Galaxy M1 Crab Nebula NGC281 Pacman Nebula in Cassiopeia NGC 6992 Veil Nebula in Cygnus
Posted by HumanistJohnImages taken October 2nd 2021 with Stellina 1.
Posted by HumanistJohnImages taken October 2nd 2021 with Stellina 1.
Posted by HumanistJohnImages taken October 2nd 2021 with Stellina 1.
Posted by starwatcher-al Did you know that you can see Venus in the daytime?
Posted by starwatcher-alOne of these days I think that I'll figure out this Nikon.