超新星兄弟姐妹：评估共享同一家长星系的IA类型属性的一致性

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超新星兄弟姐妹：评估共享同一家长星系的IA类型属性的一致性

Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies

论文作者

Scolnic, D., Smith, M., Massiah, A., Wiseman, P., Brout, D., Kessler, R., Davis, T. M., Foley, R. J., Galbany, L., Hinton, S. R., Hounsell, R., Kelsey, L., Lidman, C., Morgan, R., Nichol, R. C., Möller, A., Popovic, B., Sako, M., Sullivan, M., Thomas, B. P., Abbott, T. M. C., Aguena, M., Allam, S., Annis, J., Avila, S., Bechtol, K., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Costanzi, M., da Costa, L. N., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eckert, K., Eifler, T. F., Everett, S., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Glazebrook, K., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lewis, G. F., Li, T. S., Lima, M., Macaulay, E., Maia, M. A. G., Marshall, J. L., Menanteau, F., Miquel, R., Palmese, A., Paz-Chinchón, F., Plazas, A. A., Pursiainen, M., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Sommer, N. E., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, B. E., Varga, T. N., Walker, A. R., Wilkinson, R.

论文摘要

尽管许多研究表明，IA SN型（SNE IA）的光曲线的性质与宿主星系的性质之间存在相关性，但仍不清楚是什么驱动这些相关性。我们引入了一种新的直接方法来研究这些相关性，通过分析托有多个sne ia“兄弟姐妹”的“父”星系。在这里，我们搜索了Dark Energy调查SN样本，这是发现的SNE最大样本之一，并找到了8个托管两个可能IA SNE的星系。比较这些SNE的光曲线特性并从光曲线中恢复了距离，我们发现与任何随机星系在同一星系中的SNE性质之间没有更好的一致性，除了SN的光曲线伸展。我们以$2.8σ$的意义显示，SNE IA距离模量残差的固有散射的至少1/2不是来自公共宿主特性。我们还讨论了我们可以通过LSST进行此评估的鲁棒性，该评估将发现$ 100 \ times $ $对的星系对，并在同一家长星系中铺平了有关IA型超新星一致性的新研究。最后，我们认为，这些SNE中的一些实际上是单个带有多个图像的镜头SN。

While many studies have shown a correlation between properties of the light curves of Type Ia SN (SNe Ia) and properties of their host galaxies, it remains unclear what is driving these correlations. We introduce a new direct method to study these correlations by analyzing `parent' galaxies that host multiple SNe Ia 'siblings'. Here, we search the Dark Energy Survey SN sample, one of the largest samples of discovered SNe, and find 8 galaxies that hosted two likely Type Ia SNe. Comparing the light-curve properties of these SNe and recovered distances from the light curves, we find no better agreement between properties of SNe in the same galaxy as any random pair of galaxies, with the exception of the SN light-curve stretch. We show at $2.8σ$ significance that at least 1/2 of the intrinsic scatter of SNe Ia distance modulus residuals is not from common host properties. We also discuss the robustness with which we could make this evaluation with LSST, which will find $100\times$ more pairs of galaxies, and pave a new line of study on the consistency of Type Ia supernovae in the same parent galaxies. Finally, we argue that it is unlikely some of these SNe are actually single, lensed SN with multiple images.

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