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Mapeo de la estructura en espiral en el otro lado de la Vía Láctea
Alberto Sanna1, Mark J Reid2, Thomas M Dame2
1Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
Science (New York, N.Y.)
|October 14, 2017
Resumen
Los astrónomos midieron la distancia a una región de formación estelar más allá del centro galáctico usando paralaje trigonométrico. Esto ayuda a mapear el brazo espiral Scutum-Centaurus de la Vía Láctea en el lado lejano.
Área de la Ciencia:
- Astronomía y astrofísica
- Estructura y Dinámica Galáctica
Sus antecedentes:
- Las regiones más allá del centro galáctico son poco conocidas debido a la oscuridad del polvo.
- La medición de distancias en estas regiones remotas es un desafío.
Objetivo del estudio:
- Para determinar la distancia a una fuente de agua maser ubicada más allá del centro galáctico.
- Para investigar la estructura espiral galáctica, específicamente el brazo Scutum-Centaurus.
- Validar las técnicas de medición de distancias en regiones oscuras.
Principales métodos:
- Medición directa de la paralaje trigonométrica mediante el conjunto de líneas de base muy largas (VLBA).
- Observación de una fuente de máser de agua en una región de formación estelar activa.
Principales resultados:
- Se obtuvo una distancia de paralaje trigonométrica directa de [Fórmula: ver texto] kiloparsecs.
- Se determinó la ubicación del brazo espiral Scutum-Centaurus en el lado lejano de la Vía Láctea.
- Se validó un método cinemático para la determinación de la distancia.
Conclusiones:
- Este estudio proporciona mediciones de distancia cruciales para regiones previamente inaccesibles de la Vía Láctea.
- Los hallazgos mejoran nuestra comprensión de la estructura espiral de la Vía Láctea.
- Los métodos cinemáticos validados pueden ayudar a futuras estimaciones de distancia en áreas oscuras.
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