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An Hα Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey
Lei,Feng-Jie1,2,3; Wu,Hong1,2,3; Du,Wei1,3; Zhu,Yi-Nan1,3; Lam,Man-I4; Zhou,Zhi-Min1,3; He,Min1,2,3; Jin,Jun-Jie1,2,3; Cao,Tian-Wen1,2,3; Zhao,Pin-Song1,2,3; Yang,Fan1,3; Wu,Chao-Jian1,3; Li,Hong-Bin1,3; Ren,Juan-Juan1,3
2018-03-08
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume235Issue:1
AbstractAbstract We present the observed Hα flux and derived star formation rates (SFRs) for a fall sample of low-surface-brightness galaxies (LSBGs). The sample is selected from the fall sky region of the 40% ALFALFA H i Survey–SDSS DR7 photometric data, and all the Hα images were obtained using the 2.16 m telescope, operated by the National Astronomy Observatories, Chinese Academy of Sciences. A total of 111 LSBGs were observed and Hα flux was measured in 92 of them. Though almost all the LSBGs in our sample are H i-rich, their SFRs, derived from the extinction and filter-transmission-corrected Hα flux, are less than 1 M☉ yr?1. LSBGs and star-forming galaxies have similar H i surface densities, but LSBGs have much lower SFRs and SFR surface densities than star-forming galaxies. Our results show that LSBGs deviate from the Kennicutt–Schmidt law significantly, which indicates that they have low star formation efficiency. The SFRs of LSBGs are close to average SFRs in Hubble time and support previous arguments that most of the LSBGs are stable systems and they tend to seldom contain strong interactions or major mergers in their star formation histories.
Keywordgalaxies: evolution galaxies: star formation
DOI10.3847/1538-4365/aaa7ec
Language英语
WOS IDIOP:0067-0049-235-1-aaa7ec
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/35669
Collection中国科学院国家天文台
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China; fjlei@nao.cas.cn, hwu@bao.ac.cn
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
4.Shanghai Astronomical Observatories, Chinese Academy of Sciences, 80 Nandan Road, Xuhui District, Shanghai, 200030, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lei,Feng-Jie,Wu,Hong,Du,Wei,et al. An Hα Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey[J]. The Astrophysical Journal Supplement Series,2018,235(1).
APA Lei,Feng-Jie.,Wu,Hong.,Du,Wei.,Zhu,Yi-Nan.,Lam,Man-I.,...&Ren,Juan-Juan.(2018).An Hα Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey.The Astrophysical Journal Supplement Series,235(1).
MLA Lei,Feng-Jie,et al."An Hα Imaging Survey of the Low-surface-brightness Galaxies Selected from the Fall Sky Region of the 40% ALFALFA H i Survey".The Astrophysical Journal Supplement Series 235.1(2018).
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