Deuterium abundance in the local interstellar medium

Details Deuterium abundance in the local interstellar medium Deuterium abundance in the local interstellar medium

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2345...84f&link_type=abstract

In NASA. Goddard Space Flight Center Local Interstellar Medium, No. 81 p 84-88 (SEE N85-15539 06-90)

Astronomy and Astrophysics

Astrophysics

2

Abundance, Deuterium, Interstellar Matter, Astrophysics, Baryons, Big Bang Cosmology, Chemical Evolution, Galactic Evolution, Line Of Sight, Line Spectra, Oao 3

Scientific paper

The authors underline the present situation of deuterium abundance evaluation in interstellar space and show that it should be ≤10-5. Studying in more detail the λ Sco line of sight and having observed two Na I interstellar components toward this star, they can show that the D/H evaluation made toward λ Sco is in fact related to the local interstellar medium (less than 10 pc from the sun). Because this evaluation is also ≤10-5, it is in striking contrast with the one made toward α Aur (D/H ≥ 1.8×10-5) confirming the fact that the deuterium abundance in the local interstellar medium varies by at least a factor of two over few parsecs.

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