Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398
Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398
复制标题
重要螺旋星系的精确距离：M63、M74、NGC 1291、NGC 4559、NGC 4625 和 NGC 5398
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
R. Kennicutt
中科院分区：
文献类型：
--
作者：
K. McQuinn;E. Skillman;A. Dolphin;D. Berg;R. Kennicutt
准确的距离对于解释星系的各种测量特性至关重要。令人惊讶的是，本地体积中许多研究最透彻的螺旋星系的距离不确定性远远大于现代观测技术所能达到的距离不确定性。利用哈勃太空望远镜光学成像，我们使用红巨星分支尖端方法来测量斯皮策红外邻近星系巡天计划及其后代巡天计划中包含的六个星系的距离。样本包括 M63、M74、NGC 1291、NGC 4559、NGC 4625 和 NGC 5398。我们将我们的结果与基于各种方法报告的这些星系的距离进行比较。根据技术的不同，已发布的距离可能会有很大范围，特别是塔利-费舍尔关系。此外，行星状星云光度函数和表面亮度波动技术之间的差异在星系之间可能有所不同，这表明校准中的系统学无法解释的不准确性。我们的距离比之前的结果有所改进，因为我们使用了经过良好校准的稳定距离指示器、在最佳选择的视场中进行精确光度测量，以及降低测量不确定性的贝叶斯最大似然技术。
Accurate distances are fundamental for interpreting various measured properties of galaxies. Surprisingly, many of the best-studied spiral galaxies in the Local Volume have distance uncertainties that are much larger than can be achieved with modern observation techniques. Using Hubble Space Telescopeoptical imaging, we use the tip of the red giant branch method to measure the distances to six galaxies that are included in the Spitzer Infrared Nearby Galaxies Survey program and its offspring surveys. The sample includes M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398. We compare our results with distances reported to these galaxies based on a variety of methods. Depending on the technique, there can be a wide range in published distances, particularly from the Tully–Fisher relation. In addition, differences between the planetary nebular luminosity function and surface brightness fluctuation techniques can vary between galaxies, suggesting inaccuracies that cannot be explained by systematics in the calibrations. Our distances improve upon previous results, as we use a well-calibrated, stable distance indicator, precision photometry in an optimally selected field of view, and a Bayesian maximum likelihood technique that reduces measurement uncertainties.