Skip to main content Accessibility help
×
Home

The Evolution of 3He, 4He and D in the Galaxy

  • Cristina Chiappini (a1) and Francesca Matteucci (a2)

Abstract

In this work we present the predictions of a modified version of the ‘two-infall model’ (Chiappini et al. 1997 - CMG) for the evolution of 3He, 4He and D in the solar vicinity, as well as their distributions along the Galactic disk. In particular, we show that when allowing for extra-mixing process in low mass stars (M < 2.5 M ), as predicted by Charbonnel and do Nascimento (1998), a long standing problem in chemical evolution is solved, namely: the overproduction of 3He by the chemical evolution models as compared to the observed values in the sun and in the interstellar medium. Moreover, we show that chemical evolution models can constrain the primordial value of the deuterium abundance and that a value of (D/H) p < 3 × 10—5 is suggested by the present model. Finally, adopting the primordial 4He abundance suggested by Viegas et al. (1999), we obtain a value for ΔYZ ≃ 2 and a better agreement with the solar 4He abundance.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The Evolution of 3He, 4He and D in the Galaxy
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The Evolution of 3He, 4He and D in the Galaxy
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The Evolution of 3He, 4He and D in the Galaxy
      Available formats
      ×

Copyright

References

Hide All
Anders, E. & Grevesse, N. 1989, Geochim. Cosmochim. Acta 53, 197
Charbonnel, C., do Nascimento, J.D. Jr. 1998, A&A 336, 915
Charbonnel, C. 2000 (this volume)
Chiappini, C., Matteucci, F., Gratton, R. 1997, ApJ 477, 765
Chiappini, C., Matteucci, F., Romano, D. 2000 (in preparation)
Geiss, J. & Gloeckler, G. 1998, in Primordial Nuclei and their Galactic evolution, Prantzos, N., Tosi, M. & von Steiger, R. eds., Space Sci. Rev. 84, 239
Kennicutt, R. C. Jr. 1989, ApJ 344, 685
Linsky, J. L. 1998, in Primordial Nuclei and their Galactic evolution, Prantzos, N., Tosi, M. & von Steiger, R. eds., Space Sci. Rev. 84, 239
Maciel, W. J. 2000 (this volume)
Matteucci, F. & François, P. 1989, MNRAS 239, 885
Pagel, B.E.J. & Tautvaisiene, G. 1995, MNRAS 276, 505
Renzini, A. & Voli, M. 1981, A&A 94, 175
Rocha-Pinto, H.J. & Maciel, W. J. 1996, MNRAS 279, 447
Romano, D., Matteucci, F., Molaro, P., Bonifacio, P. 1999, A&A 352, 117
Sackman, J. 2000 (this volume)
Tosi, M. 2000 (this volume)
Tosi, M. 2000, in The chemical evolution of the Milky Way: stars versus clusters, Giovanelli, F. and Matteucci, F. eds., Kluwer (in press)
Tosi, M., Steigman, G., Matteucci, F., Chiappini, C. 1998, ApJ 498, 226
van den Hoek, L. B. and Groenewegen, M. A. T. 1997, A&AS 123, 305
Viegas, M. S., Gruenwald, R. & Steigman, G. 1999 (astro-ph/9909213)

The Evolution of 3He, 4He and D in the Galaxy

  • Cristina Chiappini (a1) and Francesca Matteucci (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed