Astrophysics

Stellar Anemia

+ See all authors and affiliations

Science  30 Aug 2002:
Vol. 297, Issue 5586, pp. 1447
DOI: 10.1126/science.297.5586.1447d

The halo of the Milky Way contains a population of metal-poor stars that are among the first stars that formed; they provide information about the abundances of the first generation of heavy elements produced from supernovae before the universe was supplemented by successive generations of stars and galaxies. Aoki et al. used the high-dispersion spectrograph on the Subaru Telescope to obtain spectra of the carbon-rich, metal-poor star CS 29498-043. This star is low in Fe but enriched in Mg, Si, N, and Al relative to other classes of carbon-rich, metal-poor stars, and, along with two other recently observed stars, it may represent a new class. This unusual ratio of elements might reflect a distinctive nucleosynthetic process in which the C and Mg produced in the outer layers of a supernova escaped while the Fe from the inner core did not. — LR

Astrophys. J., in press (astro-ph/0208019).

Related Content

Navigate This Article