论文标题
Hostphot：托管超新星或其他瞬变的星系的全局和局部光度法
HostPhot: global and local photometry of galaxies hosting supernovae or other transients
论文作者
论文摘要
自从发现宇宙加速膨胀率以来，IA型超新星（SNE IA）已作为宇宙距离指标扮演了基本角色。它们的光峰光度，光曲线的下降速率和光学颜色之间的相关性使它们成为标准化，从而减少了观察到的R.M.S散射。十年前，发现SNE IA的光峰光度与宿主星系恒星质量相关，从而进一步改善了其标准化。从那时起，宿主星系性能已被用于SNE IA的宇宙学分析，并且巨大的努力已用于寻找该特性，例如恒星形成率，从根本上讲，从根本上讲，这些特性从根本上驱动了SNE IA与宿主星系之间的相关性。此外，已经注意到，与全球环境（即整个银河系）相比，SNE IA进化的祖细胞进化的局部环境在降低估计距离的散射方面要好得多。 HostPhot是一种工具，可促进托管SNE IA的星系的局部和全局光度法的计算，因此有助于研究对这些物体的环境影响。
Type Ia supernovae (SNe Ia) have assumed a fundamental role as cosmological distance indicators since the discovery of the accelerating expansion rate of the universe. Correlations between their optical peak luminosity, the decline rate of their light curves and their optical colours allow them to be standardised, reducing their observed r.m.s scatter. Over a decade ago, the optical peak luminosity of SNe Ia was found to correlate with host galaxy stellar mass, further improving their standardisation. Since then, host galaxy properties have been used in cosmological analyses of SNe Ia and tremendous effort has gone into finding the property, such as star formation rate, that fundamentally drives the correlation between SNe Ia and their host galaxies. Furthermore, it has been noted that the local environment in which the progenitors of SNe Ia evolve is much better at reducing the scatter in estimated distances than the global environment, i.e., the whole galaxy. HostPhot is a tool that facilitates the calculation of both local and global photometry of galaxies hosting SNe Ia, therefore helping in the study of the environmental effect on these objects.
