Springer Theses

Explaining Lithium Enriched Red Giant Branch Stars

Authors: Aguilera-Gómez, Claudia

  • Nominated as an outstanding thesis by Pontificia Universidad Católica de Chile
  • Presents a groundbreaking insight into the phenomena of lithium-rich red giant stars by proposing a new, mass-dependent criteria for lithium-richness, opening up new avenues of research
  • Gives a partial explanation of the anomalous ubiquity of lithium-rich red giant stars
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eBook $109.00
price for USA in USD (gross)
  • ISBN 978-3-030-02583-0
  • Digitally watermarked, DRM-free
  • Included format: PDF, EPUB
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
Hardcover $139.99
price for USA in USD
  • ISBN 978-3-030-02582-3
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
About this book

This thesis provides new insights into the seemingly anomalous ubiquity of lithium-rich red giant stars. The theory of stellar evolution, one of the most successful models of modern astrophysics, predicts that red giant stars should display negligible levels of lithium (Li) on their surfaces. However, Li-rich giants, defined as those showing more than three times the Li content of the Sun, are found everywhere astronomers look in apparent defiance of established theory.

The author addresses this problem, analyzing the different possible explanations for such an anomaly, which include interaction with a binary companion, the production of Li in the interior of the star with its subsequent transport to stellar exteriors, and the stellar interaction with planets. The author focuses on this last possibility, where the Li enrichment may be due to the ingestion of planets or brown dwarfs as the stars in question grew in size while becoming giants. She shows that this process is indeed able to explain an important fraction of giants with Li levels above the three times solar threshold, but that some other mechanism is needed to explain the remaining fraction. While this is an important discovery in its own right, the result that makes this thesis groundbreaking is its demonstration that the threshold between Li-normal and Li-rich is mass dependent rather than a fixed proportion of the Sun’s content. This corrects a fundamental misapprehension of the phenomenon and opens up a new framework in which to understand and solve the problem.

Finally, the author presents interesting observational applications and samples with which to test this new approach to the problem of Li enrichment in giants.

About the authors

Claudia Aguilera-Gómez received her PhD in 2017 from Institute of Astrophysics at the Pontificia Universidad Católica de Chile. She currently holds a position at Universidad Andrés Bello, Chile.

Table of contents (7 chapters)

Buy this book

eBook $109.00
price for USA in USD (gross)
  • ISBN 978-3-030-02583-0
  • Digitally watermarked, DRM-free
  • Included format: PDF, EPUB
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
Hardcover $139.99
price for USA in USD
  • ISBN 978-3-030-02582-3
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
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Bibliographic Information

Bibliographic Information
Book Title
Explaining Lithium Enriched Red Giant Branch Stars
Authors
Series Title
Springer Theses
Copyright
2018
Publisher
Springer International Publishing
Copyright Holder
Springer Nature Switzerland AG
eBook ISBN
978-3-030-02583-0
DOI
10.1007/978-3-030-02583-0
Hardcover ISBN
978-3-030-02582-3
Series ISSN
2190-5053
Edition Number
1
Number of Pages
XIII, 131
Number of Illustrations
20 b/w illustrations, 23 illustrations in colour
Topics