On the shape of the local bubble

TL;DR

This paper models the asymmetric shape of the local bubble using various interstellar medium density profiles within a thin layer approximation, aligning theoretical simulations with observations and Earth's radioisotope data.

Contribution

It introduces a novel modeling approach for the local bubble's shape using different density profiles and validates it against observational data.

Findings

Model successfully reproduces observed asymmetries.

Compatible with Earth's radioisotope evidence.

Provides a reliable theoretical framework for local bubble shape.

Abstract

The shape of the local bubble is modeled in the framework of the thin layer approximation. The asymmetric shape of the local bubble is simulated by introducing axial profiles for the density of the interstellar medium, such as exponential, Gaussian, inverse square dependence and Navarro--Frenk--White. The availability of some observed asymmetric profiles for the local bubble allows us to match theory and observations via the observational percentage of reliability. The model is compatible with the presence of radioisotopes on Earth.