Establishing HI mass vs. stellar mass and halo mass scaling relations using an abundance matching method

IF 6.4 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Science China Physics, Mechanics & Astronomy Pub Date : 2024-09-10 DOI:10.1007/s11433-024-2440-3

Yi Lu, Xiaohu Yang, Chengze Liu, Haojie Xu, Antonios Katsianis, Hong Guo, Xiaoju Xu, Yizhou Gu

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Abstract

We combined data from the Sloan Digital Sky Survey (SDSS) and the Arecibo Legacy Fast ALFA Survey (ALFALFA) to establish the HI mass vs. stellar mass and halo mass scaling relations using an abundance matching method that is free of the Malmquist bias. To enable abundance matching, a cross-match between the SDSS DR7 galaxy group sample and the ALFALFA HI sources provides a catalog of 16520 HI-galaxy pairs within 14270 galaxy groups (halos). By applying the observational completeness reductions for both optical and HI observations, we used the remaining 8180 ALFALFA matched sources to construct the model constraints. Taking into account the dependence of HI mass on both the galaxy and group properties, we establish two sets of scaling relations: one with a combination of stellar mass, (g-r) color and halo mass, and the other with stellar mass, specific star-formation rate (sSFR), and halo mass. We demonstrate that our models can reproduce the HI mass component as both stellar mass and halo mass. Additional tests showed that the conditional HI mass distributions as a function of the cosmic web type and the satellite fractions were well recovered.

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利用丰度匹配方法建立 HI 质量与恒星质量和光环质量的比例关系

我们将斯隆数字巡天（SDSS）和阿雷西博遗留快速ALFA巡天（ALFALFA）的数据结合起来，利用一种没有马尔奎斯特偏差的丰度匹配方法，建立了HI质量与恒星质量和晕质量的比例关系。为了能够进行丰度匹配，SDSS DR7星系群样本和ALFALFA HI源之间进行了交叉匹配，得到了14270个星系群（光环）中16520对HI-星系的星表。通过对光学观测数据和高分辨力观测数据进行观测完备性还原，我们利用剩下的8180个ALFALFA匹配源构建了模型约束。考虑到 HI 质量对星系和星系群属性的依赖，我们建立了两套比例关系：一套是恒星质量、（g-r）颜色和光环质量的组合关系，另一套是恒星质量、特定恒星形成率（sSFR）和光环质量的组合关系。我们证明，我们的模型可以同时以恒星质量和光环质量来再现 HI 质量成分。其他测试表明，作为宇宙网类型和卫星分数函数的条件 HI 质量分布得到了很好的恢复。

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来源期刊

Science China Physics, Mechanics & Astronomy PHYSICS, MULTIDISCIPLINARY-

CiteScore

10.30

自引率

6.20%

发文量

4047

审稿时长

3 months

期刊介绍： Science China Physics, Mechanics & Astronomy, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research. Science China Physics, Mechanics & Astronomy, is published in both print and electronic forms. It is indexed by Science Citation Index. Categories of articles: Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested. Research papers report on important original results in all areas of physics, mechanics and astronomy. Brief reports present short reports in a timely manner of the latest important results.