Al-26 and time scales of the solar nebula

Details Al-26 and time scales of the solar nebula Al-26 and time scales of the solar nebula

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398l.111l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 398, no. 2, p. L111-L113.

Astronomy and Astrophysics

Astrophysics

2

Accretion Disks, Aluminum Isotopes, Meteoroids, Solar System, Star Formation, Decay Rates, Molecular Clouds, Protostars

Scientific paper

The survival time (t) of protostellar accretion disks as infrared luminous, optically thick structures has been found to satisfy the constraint: t = 10 exp 7 yr or less. This sets a possible lower bound of 3 x 10 exp -9 on the ratio Al-26/Al-27 if a homogeneous mix of 'live' Al-26 existed throughout the solar nebula. The observed values of meteoritic Al-26/Al-27 range from 5 x 10 exp -5 to 5 x 10 exp -8 and are thus compatible with a 7.1 x 10 exp 6 yr age of an active solar nebula.

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