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No hay materia exótica en los asteroides.

Alan E Rubin1,2, Thomas H Burbine3

  • 1Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095-1567 USA.

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Resumen
Este resumen es generado por máquina.

Las densidades de los asteroides están generalmente dentro de los límites físicos esperados. Las afirmaciones de materia exótica, como elementos superpesados o materia oscura, en asteroides como Polyhymnia son altamente improbables en base a la evidencia actual.

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Área de la Ciencia:

  • Ciencias planetarias Ciencias planetarias.
  • La astrofísica es la astrofísica.
  • Cosmoquímica es la cosmoquímica.

Sus antecedentes:

  • Los cuerpos del Sistema Solar exhiben abundancias uniformes de elementos no volátiles.
  • Los asteroides se clasifican como cuerpos cóndricos no fundidos o cuerpos diferenciados formados a partir de progenitores cóndricos fundidos.
  • Las composiciones de los asteroides, basadas en espectros de reflexión, se alinean con las composiciones de los meteoritos, que consisten en materiales comunes como silicatos y hierro metálico.

Objetivo del estudio:

  • Evaluar críticamente las afirmaciones de que el asteroide (33) Polyhymnia posee una densidad inusualmente alta, lo que sugiere composiciones exóticas.
  • Para evaluar la probabilidad de que los asteroides contengan elementos superpesados (EPS), materia alfa o materia oscura degenerada.
  • Reforzar la comprensión de la composición de los asteroides basada en principios físicos y químicos establecidos.

Principales métodos:

  • Revisión y análisis de los datos publicados de densidad de asteroides, incluidos los valores anómalos.
  • Comparación de datos espectrales de asteroides con composiciones conocidas de meteoritos.
  • Evaluación de modelos teóricos que proponen materia exótica en asteroides frente a la evidencia observacional y las limitaciones físicas.

Principales resultados:

  • La densidad en masa reportada para el asteroide (33) Polyhymnia (75,3 ± 9,7 g cm-3) se caracteriza como poco realista y no física.
  • Los meteoritos, predominantemente originarios de asteroides, están compuestos de materiales no exóticos.
  • Los datos espectrales de los asteroides, incluidos los etiquetados como "objetos ultradensos compactos" (CUDO), no difieren significativamente de otros asteroides dentro de sus clases taxonómicas.

Conclusiones:

  • Es extremadamente improbable que Polyhymnia u otros asteroides contengan materia exótica como elementos súper pesados estables o materia oscura degenerada.
  • La existencia de SHEs y materia oscura degenerada sigue sin ser probada, y la materia alfa se encuentra típicamente solo en entornos astrofísicos extremos.
  • Las densidades de los asteroides están limitadas por la física conocida y la composición de los meteoritos, lo que apoya una base material no exótica.