41Ca in Presolar Graphite of Supernova Origin

Details 41Ca in Presolar Graphite of Supernova Origin 41Ca in Presolar Graphite of Supernova Origin

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...470l.101a&link_type=abstract

Astrophysical Journal Letters v.470, p.L101

Astronomy and Astrophysics

Astronomy

27

Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Supernovae: General, Ism: Dust, Extinction

Scientific paper

Five low-density graphite grains from the Murchison meteorite have large 41K excesses that can be attributed to the decay of 41Ca. The inferred 41Ca/40Ca ratios, which range up to 1.7 x 10-2, and other isotopic signatures, 15N, 18O, and 28Si excesses and high 26Al/27Al ratios, indicate a Type II supernova origin for these grains and are evidence for heterogeneous mixing of supernova ejecta. 41Ca seems to mainly originate from neutron capture in the C-rich and O-rich supernova zones, with only minor contributions from the O-burning zone. Admixture of material from the O-rich zone to outer C-rich layers is required to explain the abundance patterns of the stable Ca isotopes. In contrast, the Ti isotopic compositions reflect that of the C-rich zone and do not require substantial amounts of material from the O-rich zone.

Affiliated with

Also associated with

No associations

Rating

41Ca in Presolar Graphite of Supernova Origin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 41Ca in Presolar Graphite of Supernova Origin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 41Ca in Presolar Graphite of Supernova Origin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1212869