EG Andromedae: A Symbiotic System as an Insight into Red Giant Chromospheres
Joseph Roche

TL;DR
This paper uses Hubble Space Telescope observations of the symbiotic system EG Andromedae to study red giant chromospheres, providing insights into stellar evolution and atmospheric properties applicable to the broader red giant population.
Contribution
It demonstrates how observations of the EG Andromedae system can reveal details about red giant atmospheres and compares these with an isolated red giant spectral standard.
Findings
Similarities between EG And and the spectral standard HD148349.
Insights into the structure of red giant chromospheres.
Validation of using symbiotic systems to study red giant atmospheres.
Abstract
Symbiotic systems are interacting binary stars consisting of both hot and cool components. This results in a complex environment that is ideal for studying the latter stages of stellar evolution along with interactions within binary systems. As a star approaches the end of its life, in particular the red giant phase, it exhausts its supply of core hydrogen and begins burning its way through successively heavier elements. Red giants lose mass in the form of a dense wind that will replenish the interstellar medium with chemical elements that are formed through nuclear processes deep in the stellar interior. When these elements reach the interstellar medium they play a central role in both stellar and planetary evolution, as well as providing the essential constituents needed for life. The undoubted significance of these cool giants means the study of their atmospheres is necessary to help…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Solar and Space Plasma Dynamics
