Deja Vu All Over Again: The Reappearance of Supernova Refsdal

In Hubble Space Telescope (HST) imaging taken on 2014 November 10, four images of supernova (SN) "Refsdal" (redshift z = 1.49) appeared in an Einstein-cross-like configuration (images S1-S4) around an early-type galaxy in the cluster MACS J1149.5+2223 (z = 0.54). Almost all lens models of...

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Detalles Bibliográficos
Autores: Kelly, P. L., Rodney, S. A., Treu, T., Strolger, L. -G., Foley, R. J., Jha, S. W., Selsing, J., Brammer, G., Bradač, M., Cenko, S. B., Graur, O., Filippenko, A. V., Hjorth, J., McCully, C., Molino, Alberto, Nonino, M., Riess, A. G., Schmidt, K. B., Tucker, B., von der Linden, A., Weiner, Benjamin J., Zitrin, A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/380907
Acceso en línea:http://hdl.handle.net/10261/380907
Access Level:acceso abierto
Palabra clave:Galaxies: clusters: general
Galaxies: individual (MACS J1149.5+2223)
Gravitational lensing: strong
Supernovae: general
Supernovae: individual (SN Refsdal)
Descripción
Sumario:In Hubble Space Telescope (HST) imaging taken on 2014 November 10, four images of supernova (SN) "Refsdal" (redshift z = 1.49) appeared in an Einstein-cross-like configuration (images S1-S4) around an early-type galaxy in the cluster MACS J1149.5+2223 (z = 0.54). Almost all lens models of the cluster have predicted that the SN should reappear within a year in a second host-galaxy image created by the cluster's potential. In HST observations taken on 2015 December 11, we find a new source at the predicted position of the new image of SN Refsdal approximately 8″ from the previous images S1-S4. This marks the first time the appearance of a SN at a particular time and location in the sky was successfully predicted in advance! We use these data and the light curve from the first four observed images of SN Refsdal to place constraints on the relative time delay and magnification of the new image (SX) compared to images S1-S4. This enables us, for the first time, to test "blind" lens model predictions of both magnifications and time delays for a lensed SN. We find that the timing and brightness of the new image are consistent with the blind predictions of a fraction of the models. The reappearance illustrates the discriminatory power of this blind test and its utility to uncover sources of systematic uncertainty. From planned HST photometry, we expect to reach a precision of 1%-2% on the time delay between S1-S4 and SX. © 2016. The American Astronomical Society. All rights reserved.

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