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Detección de la lente gravitacional que aumenta una supernova de tipo Ia
Robert M Quimby1, Masamune Oguri, Anupreeta More
1Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8583, Japan.
Science (New York, N.Y.)
|April 26, 2014
Resumen
Los astrónomos confirmaron que una supernova de tipo Ia (SNIa) fue magnificada por una galaxia en primer plano.
Área de la Ciencia:
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
- Lente gravitacional es el fenómeno de las lentes gravitacionales.
Sus antecedentes:
- Las supernovas de tipo Ia (SNIa) son cruciales para medir las distancias cósmicas.
- La lente gravitacional de objetos masivos puede crear múltiples imágenes de SNIa, permitiendo pruebas de expansión cósmica.
- Distinguir SNIa con lente de otros fenómenos es un desafío.
Objetivo del estudio:
- Para resolver el debate sobre una supernova brillante: un nuevo tipo o una SNIa magnificada.
- Para confirmar la primera instancia de fuerte ampliación de una SNIa por una galaxia de primer plano.
- Explorar métodos para el descubrimiento de SNIa.Ia. más lentes.
Principales métodos:
- Adquirió un espectro de la supernova después de que su luz se desvaneció.
- Analizaron el espectro para identificar la presencia de una galaxia en primer plano.
- Comparó los datos de observación con las predicciones de las supernovas con lente.
Principales resultados:
- Se confirmó que la supernova era una supernova de tipo Ia (SNIa) fuertemente magnificada por una galaxia en primer plano.
- El espectro post-desvanecimiento reveló la galaxia lente, resolviendo el debate observacional.
- Los hallazgos sugieren que puede existir más SNIa con lente de lo que se estimó anteriormente.
Conclusiones:
- Este estudio presenta el primer caso confirmado de fuerte magnificación gravitacional de una SNIa por una galaxia en primer plano.
- El descubrimiento valida el uso de SNIa como sondas en sistemas de lentes fuertes.
- Encuestas futuras pueden arrojar una tasa más alta de descubrimientos de SNIa lenteados de lo previsto.
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