What question did this study set out to answer?

This research investigates how mergers influence pair conservation within the BBGKY hierarchy model.

March 22, 2026Open Access

Breaking pair conservation: Mergers in the BBGKY hierarchy

Key Points

This research investigates how mergers influence pair conservation within the BBGKY hierarchy model.
Developed a model based on the pair-conservation equation from the BBGKY hierarchy.
Analyzed the impact of mergers on pair conservation at small separations.
Applied the model to hypothetical tracers like halos and galaxies.
Studied the consequences of biased events leading to pair destruction.
Showed the significance of understanding mergers for interpreting spectroscopic survey data.

Abstract

The mean pairwise velocity is a powerful cosmological probe, complimentary to density-based statistics. We have developed an accurate model the pair-conservation equation derived break pairs from the BBGKY hierarchy, and demonstrated its constraining power down to small (~1 Mpc/h) separations. However, applying this model to tracers such as halos or galaxies raises a fundamental question: merging. Biased events destroy pairs, breaking the pair conservation assumption, at the core of the model. Understanding this effect is crucial to interpreting future small-scale data from spectroscopic surveys

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Cite This Study

Bravo et al. (Thu,) studied this question.

synapsesocial.com/papers/69bf390ac7b3c90b18b43359 https://doi.org/https://doi.org/10.5281/zenodo.19130742

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