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Nuevos datos reprocesados sobre Venus a disposición de la comunidad
17 de Noviembre de 2020
Una versión reciente y mejor procesada de los datos sobre el planeta Venus, recopilados por ALMA (Atacama Large Millimeter/submillimeter Array) en Chile, se ha puesto a disposición del público a través del archivo científico de ALMA.
Las observaciones sobre nuestro planeta hermano Venus realizadas por ALMA, del cual ESO es socio, fueron llevadas a cabo en el 2019 por petición de un equipo de astrónomos liderados por Jane Greaves de la Universidad de Cardiff (Reino Unido). El equipo usó los datos de ALMA para confirmar si la molécula poco común, la fosfina, estaba presente en las nubes de Venus, luego de detectar signos de este elemento en observaciones realizadas con el Telescopio James Clerk Maxwell (JCMT), operado por el Observatorio de Asia Oriental (East Asian Observatory), en Hawái.
El descubrimiento atrajo la atención internacional debido al significado de la fosfina como posible biomarcador. Esto también generó una positiva discusión científica, con equipos de todo el mundo analizando el estudio y sus datos asociados.
Como resultado del escrutinio, el equipo de ALMA identificó un problema en los datos de ALMA: una falsa “onda” en las observaciones de Venus que podría tener un efecto sobre la detección de la fosfina. La identificación de señales débiles desde objetos del Sistema Solar muy brillantes como es el caso de Venus puede ser especialmente difícil, ya que son muy estrictos los requerimientos sobre como ALMA debe configurarse para este tipo de observación. Además, el equipo de ALMA encontró problemas de software menores que, al combinarse con la configuración específica para las observaciones de Venus, causaban que la “onda” apareciera en los datos.
Siguiendo los procedimientos estipulados, una vez que el potencial problema fue identificado, el equipo del Centro Regional Europeo de ALMA situado en ESO removió los datos desde el archivo científico de ALMA para arreglar el problema. Una versión más exacta y recalibrada de los datos ha sido incorporada al archivo de ALMA donde está disponible para la comunidad astronómica.
Greaves y su equipo han usado los datos recientemente calibrados en un nuevo estudio (todavía sin revisión por pares) de la atmósfera de Venus. Otros grupos interesados en el estudio de Venus pueden actualmente hacer uso de la versión mejor procesada de los datos para evaluar la solidez en la detección de fosfina, ayudándonos en el proceso a aprender más sobre nuestro planeta hermano.
Información adicional
ALMA es una instalación astronómica internacional fruto de la colaboración entre ESO, la Fundación Nacional para la Ciencia de EE.UU. (NSF, National Science Foundation) y los Institutos Nacionales de Ciencias Naturales de Japón (NINS, National Institutes of Natural Sciences) en cooperación con la República de Chile.
Contactos
Martin Zwaan
ALMA Regional Centre
European Southern Observatory
Garching bei München, Germany
Email: mzwaan@eso.org
Bárbara Ferreira
ESO Public Information Officer
Garching bei München, Germany
Tel: +49 89 3200 6670
Email: pio@eso.org
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