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September 10, 2025Astronomy and AstrophysicsOpen Access

Exocomets of β Pictoris. I. Exocomet destruction, sodium absorption and disk line variability in 17 years of HARPS observations

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General absence of sodium absorption from exocomets is observed, with only two significant events noted across 198 nights.
Long-term monitoring reveals persistent Ca,II absorption over one year, challenging traditional exocomet models.
Bayesian algorithms were used to systematically analyze HARPS spectra, highlighting unpredictable comet dynamics.
Strongly accelerating exocomet features point to rapid changes, suggesting dynamic destruction post-periastron passages.

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Analysis uncovers sodium absorption variability and exocomet dynamics in β Pictoris, highlighting implications for comet destruction.

Hoeijmakers et al. (2025) studied this question.

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