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Desvelando extensas nubes de gas oscuro en el vecindario solar
Isabelle A Grenier1, Jean-Marc Casandjian, Régis Terrier
1Astrophysique Interactions Multi-échelles (CEA/ Universite Paris 7/CNRS), Commissanatá l'Energie Atomique, DSM/DAPNIA, Service d'Astrophysique, CEA, Saclay, 91191 Gif sur Yvette, France. isabelle.grenier@cea.fr
Science (New York, N.Y.)
|February 26, 2005
Resumen
Se han descubierto enormes nubes de gas oscuro y polvo frío, previamente invisibles, que rodean nubes moleculares cercanas. Este hallazgo sugiere que es la Vía Láctea.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Investigación en el medio interestelar.
- Física de las astropartículas Física de las astropartículas
Sus antecedentes:
- El gas interestelar existe en formas atómicas (HI) y moleculares (CO).
- El polvo y los rayos gamma ofrecen trazadores alternativos de la materia interestelar.
- La composición completa y la estructura del medio interestelar no se entienden completamente.
Objetivo del estudio:
- Para investigar la presencia y las propiedades del "gas oscuro" en el vecindario solar.
- Comprender el papel del gas oscuro en la evolución de las nubes interestelares.
- Para comparar la masa de gas oscuro con otras fases de gas en la Vía Láctea.
Principales métodos:
- Comparación de las observaciones de las líneas HI y CO.
- Analizando la emisión térmica del polvo.
- Detección de rayos gamma de las interacciones de rayos cósmicos con el gas.
Principales resultados:
- Descubrimiento de extensas nubes de polvo frío y gas oscuro.
- Estas nubes son invisibles en HI y CO pero detectables a través de los rayos gamma.
- Las nubes de gas oscuro vinculan núcleos moleculares densos con regiones de gas atómico más amplias.
Conclusiones:
- El gas oscuro juega un papel crucial en la evolución de las nubes interestelares.
- La masa total de gas oscuro en la Vía Láctea es comparable a la masa molecular del gas.
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