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At least one in a dozen stars exhibits evidence of planetary ingestion

Space Sciences

At least one in a dozen stars exhibits evidence of planetary ingestion

F. Liu, Y. Ting, et al.

Discover how stellar chemical compositions reveal clues about planetary ingestion and formation! This groundbreaking study conducted by Fan Liu, Yuan-Sen Ting, David Yong, Bertram Bitsch, Amanda Karakas, Michael T. Murphy, Meridith Joyce, Aaron Dotter, and Fei Dai uncovers new evidence of planetary signatures in co-natal star pairs, highlighting their impact on stellar evolution.

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Playback language: English
Abstract
Stellar chemical compositions can be altered by ingestion of planetary material and/or planet formation. Detecting these "planet signatures" is challenging. This study reports high-precision chemical abundances for 91 co-natal pairs of stars, identifying at least seven new instances of planetary ingestion (8% occurrence rate). A Bayesian indicator effectively disentangles planet signatures from other factors. The study provides new evidence of planet signatures and constraints on planet engulfment, formation, and evolution.
Publisher
Published On
Authors
Fan Liu, Yuan-Sen Ting, David Yong, Bertram Bitsch, Amanda Karakas, Michael T. Murphy, Meridith Joyce, Aaron Dotter, Fei Dai
Tags
stellar chemical compositions
planet ingestion
chemical abundances
planet formation
Bayesian indicator

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