Neutral atomic hydrogen observation of low redshift galaxies

Wang, Jing

doi:10.1360/sspma2016-00340

Cited by 2 publications

(2 citation statements)

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“…Most of the target selections in previous studies usually focused on certain types of galaxies with specific criteria of physical properties (Wang 2017), and missed a fraction of galaxies which are also detected in H I surveys. Even in the α.40-SDSS-GALEX sample of Huang et al (2012), there are nearly one-third of galaxies excluded from the parent sample.…”

Section: Introductionmentioning

confidence: 99%

The Relation between H I Gas and Star Formation Properties in Nearby Galaxies

Zhang

Zhou

et al. 2018

PASP

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In this paper, we present some correlations of neutral hydrogen (Hi) gas and physical properties of galaxies to investigate the role of atomic gas in governing galaxy evolution. We build a Hi-detected sample including 70 galaxies that are detected by ALFALFA in a 15 deg 2 region, and derive their star formation distribution based on the images of Hα narrow-band observed here. In general, Hidetected galaxies have low surface density of stellar mass and active star formation. Additionally, most of the galaxies are in good agreement with the star-forming main sequence, consistent with the previous findings. We confirm the dependence of star formation (SF) in galaxies on Hi gas at least on global scale, i.e., star formation rate (SFR) generally increases with Hi mass, specific star formation rate (SSFR≡SFR/M * ) increases with Hi fraction (f Hi ) even for a given stellar mass, and Hi-based star formation efficiency (SFE) mildly increases with the stellar mass and SFR surface density. Based on the distribution of stellar mass and star formation, we calculate the morphology indices of the sample, and analyze the dependence of f Hi and SFE on them. The weak correlations between SFE and morphological indexes imply a weak physical link between Hi and star formation in small scale. We find that f Hi mildly increases with the asymmetry and decreases with the concentration of galaxies, suggesting that the Hi gas supply and its effect are likely correlated with external processes in the extended disks of galaxies.

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Section: Introductionmentioning

confidence: 99%

The Relation between H I Gas and Star Formation Properties in Nearby Galaxies

Zhang

Zhou

et al. 2018

PASP

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“…http://engine.scichina.com/doi/10.1360/SSPMA2017-00006 后Zhang等人 [100] 研究了300个低红移星系团内的气体剥离效应, 进一步证实了上述结论: 随着到星系团中心的距离减小, 星系冷气体含量显著减少, 但在星系团给定半径处, 气体减少量更大程度上依赖于µ * 而非M * (参见文献 [101]中图 4). 目前的半解析模型无法定量重现以上观测结果 [38,102] , 这是因为模型中造成卫星星系熄灭的机制是"窒息", 而跟星系的内部结构参数(如µ * )无关.…”

Section: -7unclassified

Star formation quenching in galaxies

2017

Sci. Sin.-Phys. Mech. Astron.

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Neutral atomic hydrogen observation of low redshift galaxies

Cited by 2 publications

References 89 publications

The Relation between H I Gas and Star Formation Properties in Nearby Galaxies

The Relation between H I Gas and Star Formation Properties in Nearby Galaxies

Star formation quenching in galaxies

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