The interstellar (C-12)/(C-13) ratio toward MU Normae

Details The interstellar (C-12)/(C-13) ratio toward MU Normae The interstellar (C-12)/(C-13) ratio toward MU Normae

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...363..192c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 1, 1990, p. 192-196. Research supported by the Robert A. Welch Fo

Astronomy and Astrophysics

Astrophysics

6

Carbon 12, Carbon 13, Interstellar Matter, Molecular Clouds, Stellar Composition, Absorption Spectra, Astronomical Spectroscopy, Charge Coupled Devices, Spectral Line Width

Scientific paper

In this paper, the (C-12)/(C-13) ratio in the interstellar cloud toward the star Mu Normae (HD 149038) is determined by estimating the abundance of (C-13)H(+) relative to (C-12)H(+). The equivalent widths of the lines for these ions were determined at 4232 and 3957 A. For the (C-12)H(+) lines, these values were 26.988 + or - 0.108 mA at 4232 A and 15.561 + or - 0.250 mA, respectively, and for (C-13)H(+) the corresponding values were 0.556 + or - 0.0 mA and 0.202 + or - 0.171 mA. The (C-12)/(C-13) ratio obtained from the 4232 A line was 56.9 + or - 6.4, while that from the 3957 A line was 85 + or - 72.

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