Extinction and Radial Distribution of Supernova Properties in Their Parent Galaxies
Extinction and Radial Distribution of Supernova Properties in Their Parent Galaxies
复制标题
母星系中超新星特性的消光和径向分布
DOI：
10.1086/305903
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Jennifer Deaton
中科院分区：
文献类型：
--
作者：
K. Hatano;D. Branch;Jennifer Deaton
我们使用蒙特卡罗技术，并在一个产生 SN 的特征盘状星系的简单模型中假设尘埃和超新星 (SN) 前身的空间分布，以探索消光对其母星系中 SN 属性的径向分布的影响。给出了各种 SN 类型的模型消光分布和投影径向数分布。尽管该模型在中心 3 kpc 范围内没有核心塌缩超新星，但由于其垂直尺度高度较小，相当一部分核心塌缩超新星被投射到倾斜母星系的内部区域。该模型预测，由于灭绝，投射到中心区域的超新星平均来说应该比外部区域的超新星显得更暗，并且具有更大的散射强度。特别是，该模型预测在几千秒差距的预计半径内会严重缺乏明亮的核心塌陷事件。在观察中发现存在这种缺陷。这似乎是星系中尘埃和核心塌陷超新星特征空间分布的自然结果，它使我们为肖尔效应的传统解释提供了另一种解释。
We use a Monte Carlo technique and assume spatial distributions of dust and supernova (SN) progenitors in a simple model of a characteristic SN-producing disk galaxy to explore the effects of extinction on the radial distributions of SN properties in their parent galaxies. The model extinction distributions and projected radial number distributions are presented for various SN types. Even though the model has no core-collapse SNe within 3 kpc of the center, a considerable fraction of the core-collapse SNe are projected into the inner regions of inclined parent galaxies owing to their small vertical scale height. The model predicts that because of extinction, SNe that are projected into the central regions should, on average, appear dimmer and have a much larger magnitude scatter than those in the outer regions. In particular, the model predicts a strong deficit of bright core-collapse events inside a projected radius of a few kiloparsec. Such a deficit is found to be present in the observations. It appears to be a natural consequence of the characteristic spatial distributions of dust and core-collapse SNe in galaxies, and it leads us to offer an alternative to the conventional interpretation of the Shaw effect.