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One- and multi-component models of the upper photosphere based on molecular spectra

III: CH(0, 0) 13144 of the CH C-X System

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Abstract

We have obtained accurate center-to-limb photoelectric spectra of the CH (0, 0) C-X bandhead region λ3143–3148 Å at Kitt Peak National Observatory. From these spectra and a detailed analysis of the formation of the CH (0, 0) spectrum we demonstrate that the best-fit upper photospheric model derived from our previous analyses of CN (0, 0) and CN (1, 1) spectra adequately explains the CH C-X observations. In addition we derive a solar carbon abundance of ±0.20 compared to the HSRA value of log Ac = 8.55. This confirms our previous CN analyses which demonstrated that if the HSRA nitrogen abundance of log AN = 7.93 ± 0.10 is assumed, then log Ac = 8.20 ± 0.10. We also specify the regions of formation for the CH(0, 0) λ3143.47 Å band-head at disc center and limb.

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Authors and Affiliations

  1. Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, 80302, Boulder, Colo., U.S.A.

    George H. Mount & Jeffrey L. Linsky

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  1. George H. Mount
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  2. Jeffrey L. Linsky
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Visiting Astronomer at Kitt Peak National Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.

Staff member, Laboratory Astrophysics Division, National Bureau of Standards.

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Mount, G.H., Linsky, J.L. One- and multi-component models of the upper photosphere based on molecular spectra. Sol Phys 36, 287–298 (1974). https://doi.org/10.1007/BF00151197

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