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Isotopic abundance ratios for carbon and nitrogen in Nova Herculis 1934Spectra of Nova Herculis 1934 taken during an episode of intense CN absorption are analyzed to determine the isotopic abundance ratios of C12/C13 and N14/N15. Synthetic spectrum analysis, based on the wavelengths, excitation potentials, and oscillator strengths for the CN lines, and radial velocity measurements indicate that C(12)N(14) was the dominant species in the Nova, and that the minimum abundance limit for C12/C13 is about 1.5, while the minimum for N14/N15 is about 2. The results are compared with predictions based on models of thermonuclear runaways in hydrogen-rich envelopes of white dwarfs. It is noted that the nova material may have been contaminated with C13-rich material prior to or during the eruption. Possible causes of this isotope enrichment are presented.
Document ID
19750041186
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sneden, C.
(Lick Observatory Santa Cruz, Calif., United States)
Lambert, D. L.
(Texas, University Austin, Tex., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1975
Publication Information
Publication: Royal Astronomical Society
Subject Category
Astrophysics
Accession Number
75A25258
Funding Number(s)
CONTRACT_GRANT: NGL-15-003-002
Distribution Limits
Public
Copyright
Other

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