| Autor: |
Quimby RM; Kavli 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., Oguri M, More A, More S, Moriya TJ, Werner MC, Tanaka M, Folatelli G, Bersten MC, Maeda K, Nomoto K |
| Jazyk: |
angličtina |
| Zdroj: |
Science (New York, N.Y.) [Science] 2014 Apr 25; Vol. 344 (6182), pp. 396-9. |
| DOI: |
10.1126/science.1250903 |
| Abstrakt: |
Objects of known brightness, like type Ia supernovae (SNIa), can be used to measure distances. If a massive object warps spacetime to form multiple images of a background SNIa, a direct test of cosmic expansion is also possible. However, these lensing events must first be distinguished from other rare phenomena. Recently, a supernova was found to shine much brighter than normal for its distance, which resulted in a debate: Was it a new type of superluminous supernova or a normal SNIa magnified by a hidden gravitational lens? Here, we report that a spectrum obtained after the supernova faded away shows the presence of a foreground galaxy-the first found to strongly magnify a SNIa. We discuss how more lensed SNIa can be found than previously predicted. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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