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Ciencia de los cometas. La superficie rica en materia orgánica del cometa 67P/Churyumov-Gerasimenko vista por

F Capaccioni¹, A Coradini², G Filacchione²

¹Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica (INAF), Rome, Italy. fabrizio.capaccioni@iaps.inaf.it.

Science (New York, N.Y.)

|January 24, 2015

Resumen

El cometa 67P fue descubierto

Área de la Ciencia:

Ciencia de los Cometas Ciencia de los Cometas
La astroquímica es astroquímica.
Ciencias planetarias Ciencias planetarias.

Sus antecedentes:

El núcleo del cometa 67P/Churyumov-Gerasimenko fue estudiado por el instrumento VIRTIS de la nave espacial Rosetta.
Los cometas son la clave para entender el sistema solar temprano.

Objetivo del estudio:

Para analizar la composición de la superficie del cometa 67P.
Para identificar los compuestos que contienen carbono y su naturaleza.

Principales métodos:

Análisis de los datos espectrales del espectrómetro de imágenes visibles, infrarrojas y térmicas (VIRTIS).
Examen de la reflectancia del núcleo, las pendientes espectrales y las características de absorción.

Principales resultados:

Hay evidencia de compuestos que contienen carbono, probablemente materiales macromoleculares orgánicos no volátiles, a través de la superficie del cometa.
El albedo bajo del núcleo y las características espectrales específicas indican una mezcla de grupos carbono-hidrógeno y oxígeno-hidrógeno.
Posibles pequeñas cantidades de hielo de agua en áreas activas, pero la superficie está generalmente deshidratada.

Conclusiones:

La superficie del cometa 67P es rica en materiales orgánicos complejos.
La superficie del cometa está predominantemente deshidratada, con pruebas limitadas de hielo de agua.
Los datos de VIRTIS revelan información sobre la composición y evolución de los núcleos cometarios.

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