Observations of the 327 MHz Deuterium Hyperfine Transition

Details Observations of the 327 MHz Deuterium Hyperfine Transition Observations of the 327 MHz Deuterium Hyperfine Transition

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aj....133.1625r&link_type=abstract

The Astronomical Journal, Volume 133, Issue 4, pp. 1625-1632 (2007).

Astronomy and Astrophysics

Astronomy

5

Cosmology: Observations, Galaxy: General, Ism: Abundances, Radio Lines: Ism, Techniques: Spectroscopic

Scientific paper

We report measurements of the 327 MHz line of deuterium for regions in the Galactic plane at 171°, 183°, and 195° longitude using an array of 24 stations of fixed phased-antenna elements. The anticenter region was observed using simultaneous multiple beams at each station over a period of just over 2 years from 2004 June to 2006 July. The average deuterium-to-hydrogen (D/H) ratio in the Galactic anticenter region derived from these observations is 21 ± 7 parts per million. The error is ±3 σ and includes the model-dependency error in conversion of the line amplitudes to the D/H ratio.

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