Timeline for How much difference did the supply of "fresh" r-process elements make to the Solar System.?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 23, 2019 at 21:04 | vote | accept | Steve Linton | ||
| May 23, 2019 at 15:38 | comment | added | Peter Erwin | For what it's worth, the CK Vul paper says that Al-26 "is thought to be efficiently produced in a variety of stars, including: classical novae with O-Mg-Ne white dwarfs; Wolf-Rayet stars; core-collapse supernovae; and asymptotic-giant-branch (AGB) stars that experienced hot bottom burning". I gather the idea in this case is that the Al-26 wasn't produced by the stellar collision, but rather that pre-existing Al-26 inside one or both stars was dispersed by the collision. | |
| May 23, 2019 at 15:37 | comment | added | PM 2Ring | Ah, ok. Somehow I missed that bit. | |
| May 23, 2019 at 15:36 | comment | added | Peter Erwin | That press release also says, "the team have concluded that the production of aluminium-26 by objects similar to CK Vulpeculae is unlikely to be the major source of aluminium-26 in the Milky Way". | |
| May 23, 2019 at 14:18 | comment | added | PM 2Ring | Ok, that's what Wikipedia says. OTOH, eso.org/public/australia/news/eso1826 says "observations using ALMA find radioactive isotope aluminium-26 from the remnant CK Vulpeculae", which was produced by a collision of two relatively low mass stars, one being a red giant with a mass in the range of 0.8 to 2.5 $M_\odot$. | |
| May 23, 2019 at 13:19 | comment | added | Peter Erwin | @PM2Ring -- I believe Al-26 is supposed to be produced by core-collapse supernovae (which are a lot more common than neutron-star collisions). | |
| May 23, 2019 at 12:56 | comment | added | PM 2Ring | I guess low mass short half-life isotopes like Al-26 came from a nearby collision of regular stars. | |
| May 23, 2019 at 12:53 | history | edited | PM 2Ring | CC BY-SA 4.0 |
Fixed typo
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| May 23, 2019 at 11:44 | history | answered | Peter Erwin | CC BY-SA 4.0 |