The Q Branch Cooling Anomaly Can Be Explained by Mergers of White Dwarfs and Subgiant Stars

The Q Branch Cooling Anomaly Can Be Explained by Mergers of White Dwarfs and Subgiant Stars

Gaia's exquisite parallax measurements allowed for the discovery and characterization of the Q branch in the Hertzsprung–Russell diagram, where massive C/O white dwarfs (WDs) pause their dimming due to energy released during crystallization. Interestingly, the fraction of old stars on the Q bra...

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Bibliographic Details
Main Authors: Ken J. Shen, Simon Blouin, Katelyn Breivik
Format: Article
Language:English
Published: IOP Publishing 2023-01-01
Series:The Astrophysical Journal Letters
Subjects:
Binary stars
Cosmochronology
Nucleosynthesis
White dwarf stars
Online Access:https://doi.org/10.3847/2041-8213/acf57b

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