SDSS-II Supernova Survey: An Analysis of the Largest Sample of Type Ia Supernovae and Correlations with Host-Galaxy Spectral Properties
Rachel C. Wolf, Chris B. D'Andrea, Ravi R. Gupta, Masao Sako, John A. Fischer, Rick Kessler, Saurabh W. Jha, Marisa C. March, Daniel M. Scolnic, Johanna-Laina F… 展开作者
Rachel C. Wolf, Chris B. D'Andrea, Ravi R. Gupta, Masao Sako, John A. Fischer, Rick Kessler, Saurabh W. Jha, Marisa C. March, Daniel M. Scolnic, Johanna-Laina Fischer, Heather Campbell, Robert C. Nichol, Matthew D. Olmstead, Michael Richmond, Donald P. Schneider, Mathew Smith
使用迄今为止最大的Ia型超新星（SNe Ia）的单次调查样本，我们研究了SNe Ia和它们的宿主星系的属性之间的关系，主要集中在与哈勃残差（HR）的相关性。我们的样本由345个光度分类或光谱确认的SNeIa组成，这些SNeIa是SDSS-II超新星调查（SDSS-SNS）的一部分。这项分析利用了在SDSS-I/II光谱巡天和SDSS-III重子振荡光谱巡天（BOSS）的一个辅助程序中获得的主星系光谱，该程序获得了几乎所有SDSS-II SN候选主星系的光谱。此外，我们还使用了SDSS-SNS数据发布（Sako et al. 2014）中的光度宿主星系属性，例如宿主恒星质量和恒星形成率。我们证实了众所周知的HR和宿主星系质量之间的关系，并发现一个非零线性斜率的3.6σ的显着性。我们还恢复HR和宿主星系气相金属丰度和特定的恒星形成率之间的相关性，因为它们在文献中报道。通过我们的大型数据集，我们同时检查了HR和多个宿主星系属性之间的相关性，没有发现显着相关性的证据。我们还独立地分析了我们的光谱确认和光度分类的Ia超新星，并评论了类似的组合数据集对未来调查的意义。
英文摘要：
Using the largest single-survey sample of Type Ia supernovae (SNe Ia) to date, we study the relationship between properties of SNe Ia and those of their host galaxies, focusing primarily on correlations with Hubble residuals (HR). Our sample consists of 345 photometrically-classified or spectroscopically-confirmed SNeIa discovered as part of the SDSS-II Supernova Survey (SDSS-SNS). This analysis utilizes host-galaxy spectroscopy obtained during the SDSS-I/II spectroscopic survey and from an ancillary program on the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) that obtained spectra for nearly all host galaxies of SDSS-II SN candidates. In addition, we use photometric host-galaxy properties from the SDSS-SNS data release (Sako et al. 2014) such as host stellar mass and star-formation rate. We confirm the well-known relation between HR and host-galaxy mass and find a 3.6σ significance of a non-zero linear slope. We also recover correlations between HR and host-galaxy gas-phase metallicity and specific star-formation rate as they are reported in the literature. With our large dataset, we examine correlations between HR and multiple host-galaxy properties simultaneously and find no evidence of a significant correlation. We also independently analyze our spectroscopically-confirmed and photometrically-classified SNe Ia and comment on the significance of similar combined datasets for future surveys.
我们指出，通常假设的条件，星系外流，超新星（SNe）加热是有效的，在中心地区的星暴星系，遭受无效的假设。我们表明，一个大的填充因子的热（$\ge 10^6$ K）气体是很难实现通过SNe加热，无论初始气体的温度和密度，它是均匀的或cluberous。相反，我们认为，如果分子表面密度为$> 10^3$ M $_{\odot}$ pc $^{-2}$，则来自中心区域分子云中OB协会的相关超新星可以驱动强大的外流。
