Detection of Hydrogen Emission Line 166α in M17

Details Detection of Hydrogen Emission Line 166α in M17 Detection of Hydrogen Emission Line 166α in M17

Mar 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.209.1118p&link_type=abstract

Nature, Volume 209, Issue 5028, pp. 1118 (1966).

Physics

14

Scientific paper

THE existence of recombination lines of highly excited states of hydrogen is well established through recent radio observations1,2 of various galactic H II regions. This communication reports the detection and analysis of a new line n167-->n166 (1,424.736 Mc/s) in M17, which extends our previous results1 to lower frequencies. This particular n-->n-1 transition lies closest to the well-known 21-cm hyperfine line of interstellar hydrogen. We also suggest a convenient notation for the various transitions.

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