Pre-solar grains from supernovae and novae

Details Pre-solar grains from supernovae and novae Pre-solar grains from supernovae and novae

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..349a&link_type=abstract

Highlights of Astronomy, Volume 14, p. 349-352

Astronomy and Astrophysics

Astronomy

Meteors, Meteoroids, Stars: Supernovae: General, Stars: Novae, Cataclysmic Variables

Scientific paper

Pre-solar grains from supernova ejecta silicon carbide of type X, Si3N4 and low-density graphite are characterized by Si isotopic anomalies (mainly 28Si excesses), low 14N/15N, high 26Al/27 Al ratios, and occasionally by excesses in 44Ca (from 44Ti decay). Overall isotopic features of these SiC and graphite grains can be explained by mixing of inner Si-rich zones and the outer C-and He-rich zones, but supernova models require fine tuning to account for 14N/15N and 29Si/28Si ratios of the grains. Isotopic ratios of Zr, Mo and Ba in SiC X grains may be explained by a neutron burst model. Some of the pre-solar nanodiamonds require a supernova origin to explain measured xenon isotopic ratios. Only a few nova grain candidates, with low 12C/13C, 14N/15N, and high 26Al/27 Al ratios, have been identified.

Affiliated with

Also associated with

No associations

Rating

Pre-solar grains from supernovae and novae 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 Pre-solar grains from supernovae and novae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-solar grains from supernovae and novae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-974776