Millimeter and submillimeter rest frequencies for the MgF radical

M. A. Anderson, M. D. Allen, L. M. Ziurys

Research output: Contribution to journalArticle

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Abstract

The pure rotational spectrum of the MgF radical in its ground X 2Σ++ electronic state has been observed in the laboratory using millimeter/submillimeter direct absorption spectroscopy. Rotational transitions arising from the υ = 0, 1, 2, and 3 vibrational modes of the main magnesium isotopic species, 24MgF, have been recorded, as well as those arising from the υ = 0 state of the 25Mg and 26Mg isotopomers. Rotational and fine-structure constants have been determined for these molecules, as well as hyperfine parameters for both the 19F (I = 1/2) and 25Mg (I = 5/2) nuclei. The rest frequencies presented here for MgF have an estimated accuracy of ±200 kHz, and will enable astronomical searches to be carried out for this fluoride radical. Magnesium fluoride may be present in the late-type carbon star IRC + 10216, where AlF appears to be abundant.

Original languageEnglish (US)
Pages (from-to)L53-L57
JournalAstrophysical Journal
Volume425
Issue number1 PART 2
StatePublished - Apr 10 1994
Externally publishedYes

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Keywords

  • ISM: molecules
  • Line: identification
  • Molecular data

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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