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Descubrimiento de vapor de agua alrededor de IRC+10216 como evidencia de cometas orbitando otra estrella

G J Melnick¹, D A Neufeld, K E Saavik Ford

¹Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA. gmelnick@cfa.harvard.edu

|July 13, 2001

Resumen

Los astrónomos detectaron vapor de agua alrededor de la estrella de carbono IRC+10216, un hallazgo inesperado. Esto sugiere que los cuerpos helados en órbita se están vaporizando debido al reciente aumento de la luminosidad de la estrella.

Área de la Ciencia:

La astronomía y la astrofísica.
Ciencia exoplanetaria Ciencia de los exoplanetas.

Sus antecedentes:

Desde 1995, los exoplanetas de masa de Júpiter se han detectado a través del movimiento reflejo estelar, inferido de los desplazamientos espectrales.
Este método de velocidad radial es insuficiente para detectar cuerpos más pequeños, análogos al Sistema Solar.

Objetivo del estudio:

Para investigar la composición del material circunstelar alrededor de la estrella de carbono IRC+10216.6.
Explorar métodos alternativos para la detección de cuerpos orbitales más pequeños.

Principales métodos:

Observación del vapor de agua circunstelar mediante análisis espectroscópico.
Análisis de los cambios de luminosidad de la estrella de carbono evolucionada IRC+10216.

Principales resultados:

Detección de vapor de agua significativo en el entorno circunstelar de IRC+10216.6.
El vapor de agua no suele esperarse en cantidades mensurables alrededor de las estrellas de carbono.

Conclusiones:

El vapor de agua observado sugiere fuertemente la vaporización de cuerpos helados en órbita.
Este fenómeno está relacionado con el reciente y significativo aumento de la luminosidad de IRC+10216.
Los hallazgos apoyan los modelos teóricos de vaporización de cuerpos helados alrededor de estrellas en evolución.

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