arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.00733astro-ph.GA
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宇宙流4:10000个Tully-Fisher距离的星表

Cosmicflows-4: The Catalog of ~10000 Tully-Fisher Distances

Ehsan Kourkchi, R. Brent Tully, Sarah Eftekharzadeh, Jordan Llop, Helene M. Courtois, Daniel Guinet, Alexandra Dupuy, James D. Neill, Mark Seibert, Michael Andr… 展开作者

Ehsan Kourkchi, R. Brent Tully, Sarah Eftekharzadeh, Jordan Llop, Helene M. Courtois, Daniel Guinet, Alexandra Dupuy, James D. Neill, Mark Seibert, Michael Andrews, Juana Chuang, Arash Danesh, Randy Gonzalez, Alexandria Holthaus, Amber Mokelke, Devin Schoen, Chase Urasaki

摘要:

利用旋涡星系的光度与自转速率的关系,给出了9792个旋涡星系的距离在15,000 km/s以内。样本主要是,但不是唯一的,从星系中检测到的阿尔法HI调查与阿雷西博望远镜。在SDSS u、g、r、i、z波段和WISE W1、W2波段标定了\hi线宽与光度的关系。通过利用二次参数,特别是颜色指数,我们解决了在不同波段的测量距离与前所未有的细节之间的差异。我们提供了一个目录,其中包括减少运动学,光度和倾斜参数。我们还描述了一种机器学习算法,基于随机森林技术,预测缺乏红外测光的螺旋尘埃衰减。我们确定了一个哈勃常数值H 0 = 75.1+-0.2(stat.),潜在的系统性高达+-3 km/s/Mpc。

英文摘要:

We present the distances of 9792 spiral galaxies lying within 15,000 km/s using the relation between luminosity and rotation rate of spiral galaxies. The sample is dominantly, but not exclusively, drawn from galaxies detected in the course of the ALFALFA HI survey with the Arecibo Telescope. Relations between \hi line widths and luminosity are calibrated at SDSS u, g, r, i, z bands and WISE W1 and W2 bands. By exploiting secondary parameters, particularly color indices, we address discrepancies between measured distances at different wave bands with unprecedented detail. We provide a catalog that includes reduced kinematic, photometric, and inclination parameters. We also describe a machine learning algorithm, based on the random forest technique that predicts the dust attenuation in spirals lacking infrared photometry. We determine a Hubble Constant value of H0 = 75.1+-0.2 (stat.), with potential systematics up to +-3 km/s/Mpc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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