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Key Questions for Low Metallicity Stars Rapporteur Summary of the Working Group on Low-Z Stars

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Abstract

An overview of the discussions of the working group on Low-Z stars is presented. Key questions addressed include how the abundances of lithium observed in these stars should be compared to that produced in the Big Bang. Evidence for and against a small star-to-star variation in Li abundances is reviewed, and whether such a variation, if real, necessarily indicates that stellar depletion has occurred, necessitating correction to the value compared to primordial nucleosynthesis calculations. A second key question concerns how and where the light elements are produced. Taken together, their abundance ratios strongly suggest that in low-Z stars the light elements other than 7Li are produced by cosmic ray spallation. The most recent evidence suggests that a minority of this spallation happens in the general interstellar medium, and that a larger fraction might happen in the immediate vicinity of Supernovae, possibly producing observable star-to-star variation. Finally, the question of the overall metallicity of the Galaxy is discussed. How homogeneous in space and time is its evolution? Can we identify subsystems or individual stars which indicate a pregalactic contribution to the galactic metallicity?

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References

  • Cayrel, R., 1998, Space Sci. Rev., this volume.

  • Charbonnel, C., Vauclair, S., and Zahn, J.-P.: 1992, A&A 255, 191.

    Google Scholar 

  • Deliyannis, C.P., Pinsonneault, M.H., and Duncan, D.K.: 1993, ApJ 414, 740.

    Google Scholar 

  • Duncan, D.K., Primas, F., Rebull, L., Boesgaard, A.M., Deliyannis, C.P., Hobbs, L.M., King, J.R., and Ryan, S.G.: 1997, ApJ 488, 338.

    Google Scholar 

  • Hobbs, L.M., and Thorburn, J.A.: 1994, ApJ 428, L25.

    Google Scholar 

  • Lemoine, M., Schramm, D.N., Truran, J.W., and Copi, C.J.: 1997, ApJ 478, 554.

    Google Scholar 

  • Meneguzzi, M., Audouze, J., and Reeves, H.: 1971, A&A 40, 110.

    Google Scholar 

  • Michaud, G., and Charbonneau, P.: 1991, Space Sci. Rev. 57, 1.

    Google Scholar 

  • Molaro, P., Bonifacio, P., Castelli, F., and Pasquini, L.: 1997, A&A 319, 593.

    Google Scholar 

  • Montalban, J., and Schatzman, E.: 1996, A&A 305, 513.

    Google Scholar 

  • Pinsonneault, M.H., Deliyannis, C.P., and Demarque, P.: 1992, ApJS 78, 181.

    Google Scholar 

  • Prantzos, N., Cassé, M., and Vangioni-Flam, E.: 1993, ApJ 403, 630.

    Google Scholar 

  • Primas, F.: 1996, Ph. D. Thesis, Univ. of Trieste.

  • Primas, F.: 1998, Space Sci. Rev., this volume.

  • Raddick, R. R., Thompson, D.T., Lockwood, G.W., Duncan, D.K., and Baggett, W.E.: 1987, ApJ 321, 459.

    Google Scholar 

  • Reeves, H., Audouze, J., Fowler, W.A., and Schramm, D.N.: 1973, ApJ 179, 909.

    Google Scholar 

  • Reeves, H., Fowler, W.A., and Hoyle, F.: 1970, Nature 226, 727.

    Google Scholar 

  • Schramm, D.N.: 1998, Space Sci. Rev., this volume.

  • Smith, V.V., Lambert, D.L., and Nissen, P.E.: 1993, ApJ 458, 543.

    Google Scholar 

  • Spite, F. and Spite, M.: 1982, A&A 115, 357.

    Google Scholar 

  • Spite, F., Spite, M., and Hill, V.: 1998, Space Sci. Rev., this volume.

  • Thorburn, J.A.: 1994, ApJ 421, 318.

    Google Scholar 

  • Thorburn, J.A.: 1997, private communication.

  • Yang, J., Turner, M.S., Steigman, G., Schramm, D.N., and Olive, K.A.: 1994, ApJ 281, 493.

    Google Scholar 

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Duncan, D. Key Questions for Low Metallicity Stars Rapporteur Summary of the Working Group on Low-Z Stars. Space Science Reviews 84, 167–174 (1998). https://doi.org/10.1023/A:1005067201142

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