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April 22, 2024Astronomy and AstrophysicsOpen Access

Phase angle dependence of the dust cross section in a cometary coma

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Authors

FKFelix KeiserJMJohannes MarkkanenJAJessica Agarwal

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Overview

Numerical modeling demonstrates variations in dust column area density across comet 67P, indicating that inferring dust particle properties requires spatial debiasing.

Key Points

  • The dust column area density increases by roughly two orders of magnitude at a high phase angle without night-side emission, depending directly on surface activity.
  • Numerical model calculations simulate the cometary coma by accounting for solar gravitation and radiation pressure across diverse spacecraft positions and dust sizes.
  • Highlights that deriving the scattering phase function from a measured radiance profile requires rigorous de-biasing for the observed spatial variation in dust density.

Cite This Study

Keiser et al. (2024) studied this question.

synapsesocial.com/papers/68e6e1e2b6db64358765d7a6https://doi.org/10.1051/0004-6361/202449202
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Also Consider

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  1. 1The Rosetta mission orbiter science overview: the comet phase2017 · 114 citations
  2. 2Experimental Phase Function and Degree of Linear Polarization Curves of Millimeter-sized Cosmic Dust Analogs2020 · 36 citations