Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-20T16:31:15.443Z Has data issue: false hasContentIssue false
  • English
  • Français

The oldest stars of the bulge: new information on the ancient Galaxy

Published online by Cambridge University Press:  02 August 2018

Gabriele Cescutti Open the ORCID record for Gabriele Cescutti [Opens in a new window] ,
Cristina Chiappini  and
Raphael Hirschi
Gabriele Cescutti
Affiliation:
I.N.A.F. Osservatorio Astronomico di Trieste, Italy; email: [email protected]
Cristina Chiappini
Affiliation:
Leibniz-Institut fuür Astrophysik Potsdam (AIP)
Raphael Hirschi
Affiliation:
Astrophysics Group, Faculty of Natural Sciences, Keele University Kavli IPMU (WPI), University of Tokyo
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Recently the search for the oldest stars have started to focus on the Bulge region. The Galactic bulge hosts extremely old stars, with ages compatible with the ages of the oldest halo stars. The data coming from these recent observations present new chemical signatures and therefore provide complementary constraints to those already found in the halo. So, the study of the oldest bulge stars can improve dramatically the constraints on the nature of first stars and how they polluted the pristine ISM of our Galaxy. We present our first results regarding the light elements (CNO) and the neutron capture elements. Our findings in the oldest bulge stars support the scenario where the first stellar generations have been fast rotators.

Keywords

Galaxy: bulgeGalaxy: evolutionnuclear reactionsnucleosynthesisabundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 94 - 97
Copyright
Copyright © International Astronomical Union 2018 

References

Bournard, F., 2016, Galactic Bulges, Springer International Publishing, 418, 355Google Scholar
Cescutti, G., 2008, A&A, 481, 691Google Scholar
Cescutti, G. & Chiappini, C., 2010, A&A, 515, A102Google Scholar
Cescutti, G. & Chiappini, C., 2014, A&A, 565, A51Google Scholar
Cescutti, G., Chiappini, C., & Hirschi, R., 2018a, in prep.Google Scholar
Cescutti, G., Chiappini, C., & Hirschi, R., 2018b, in prep.Google Scholar
Cescutti, G., Chiappini, C., Hirschi, R., Meynet, G., & Frischknecht, U., 2013, A&A, 553, A51Google Scholar
Cescutti, G. & Matteucci, F., 2011, A&A, 525, A126Google Scholar
Cescutti, G., Romano, D., Matteucci, F., Chiappini, C., & Hirschi, R., 2015, A&A, 577, A139Google Scholar
Cescutti, G., Valentini, M., François, P., et al. 2016, A&A, 595, A91Google Scholar
Chiappini, C. 2013 AN, 334, 595Google Scholar
Chiappini, C., Ekström, S., Meynet, G., et al. 2008, A&A, 479, L9Google Scholar
Chiappini, C., Frischknecht, U., Meynet, G., et al. 2011, Nature, 472, 454Google Scholar
Chiappini, C., Hirschi, R., Meynet, G., et al. 2006, A&A, 449, L27Google Scholar
Frischknecht, U., Hirschi, R., Pignatari, M., et al. 2016, MNRAS, 456, 1803Google Scholar
Tacchella, S., Carollo, C. M., Renzini, A., et al. 2015, Science, 348, 314Google Scholar
Winteler, C., Käppeli, R., Perego, A., et al. 2012, ApJ, 750, L22Google Scholar