Timeline for Properties of low-mass stellar remnants vs the Earth
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 8, 2019 at 14:06 | comment | added | Ken G | I was talking about the core of the Earth, which is smaller than a white dwarf, and I gave the reason for that. Yes, I know most people have not realized this, you have to think about it. As for iron in white dwarfs, I did not mean to imply the entire white dwarf would be iron,only it's core, and I expect this would be rare, but not impossible: adsabs.harvard.edu/abs/2017ApJ...848...11B states "We further identify a few white dwarfs that are possibly composed of an iron core rather than a carbon/oxygen core, since they are consistent with Fe-core evolutionary models." | |
| Feb 8, 2019 at 7:11 | comment | added | ProfRob | Iron white dwarfs? No. What do you mean by a smaller radius for its gravity? Most stellar mass white dwarfs are a similar size to the Earth. | |
| Feb 7, 2019 at 20:49 | history | edited | Ken G | CC BY-SA 4.0 |
added 553 characters in body
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| Feb 7, 2019 at 18:22 | vote | accept | P Varga | ||
| Feb 7, 2019 at 17:16 | comment | added | Ken G | Iron can get out of a star in several ways, often involving a supernova. Then the iron collects in the solar nebula as a trace component. It's still mostly hydrogen gas, but the hydrogen gas doesn't stick together in the dust, so dust picks out elements like iron, silicon, and other components of the Earth. Planets close to the Sun have especially high iron content, because iron has a high melting point so it can stick together even if it's hot. | |
| Feb 7, 2019 at 13:31 | comment | added | P Varga | Thank you. I have another question then: The Earth has a large iron core. How was all that iron dust produced that it formed from? When a star dies, as I understand the core (where iron the final fusion product is) is left behind, as fusion is occurring in a shell around it in the late stages. Or is that incorrect? | |
| Feb 7, 2019 at 6:35 | history | answered | Ken G | CC BY-SA 4.0 |