Deuterium in early-type stars - The case of Alpha-Pavonis

Details Deuterium in early-type stars - The case of Alpha-Pavonis Deuterium in early-type stars - The case of Alpha-Pavonis

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201..273v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 2, Aug. 1988, p. 273-275.

Astronomy and Astrophysics

Astrophysics

2

D Lines, Deuterium, Early Stars, H Alpha Line, Stellar Atmospheres, Abundance, Galactic Evolution, Line Shape

Scientific paper

From the observation of the Hα and Dα lines of the early-type star α Pav, it is shown that the deuterium abundance in its upper atmosphere should be less than 5×10-6 in number. This either shows that the interstellar medium abundance of deuterium at the time of the α Pav formation was so low (a result marginally compatible with todays observations of the interstellar medium) or that the deuterium was burned in α Pav stellar atmosphere during a pre-main sequence phase. In both cases, this implies a more rapid burning of the deuterium in the Galaxy than it was previously thought.

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