Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies
文献类型：期刊论文
| 作者 | Du, Wei1; Wu, Hong1 ; Zhu, Yinan1; Zheng, WeiKang2; Filippenko, Alexei V.2; Du,Wei; Wu,Hong; Zhu,Yinan; Du,Wei
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-03-10 |
| 卷号 | 837期号:2 |
| 关键词 | galaxies: abundances galaxies: evolution galaxies: star formation galaxies: stellar content methods: observational techniques: imaging spectroscopy |
| 英文摘要 | We present long-slit optical spectra of 12 edge-on low surface brightness galaxies (LSBGs) positioned along their major axes. After performing reddening corrections for the emission-line fluxes measured from the extracted integrated spectra, we measured the gas-phase metallicities of our LSBG sample using both the [N II]/ Ha and the R-23 diagnostics. Both sets of oxygen abundances show good agreement with each other, giving a median value of 12. +. log(O/H). =. 8.26 dex. In the luminosity-metallicity plot, our LSBG sample is consistent with the behavior of normal galaxies. In the mass-metallicity diagram, our LSBG sample has lower metallicities for lower stellar mass, similar to normal galaxies. The stellar masses estimated from z-band luminosities are comparable to those of prominent spirals. In a plot of the gas mass fraction versus metallicity, our LSBG sample generally agrees with other samples in the high gas mass fraction space. Additionally, we have studied stellar populations of three LSBGs, which have relatively reliable spectral continua and high signal-to-noise ratios, and qualitatively conclude that they have a potential dearth of stars with ages < 1 Gyr instead of being dominated by stellar populations with ages > 1 Gyr. Regarding the chemical evolution of our sample, the LSBG data appear to allow for up to 30% metal loss, but we cannot completely rule out the closed-box model. Additionally, we find evidence that our galaxies retain up to about three times as much of their metals compared with dwarfs, consistent with metal retention being related to galaxy mass. In conclusion, our data support the view that LSBGs are probably just normal disk galaxies continuously extending to the low end of surface brightness. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; H-II REGIONS ; DWARF IRREGULAR GALAXIES ; STAR-FORMATION HISTORIES ; GAS MASS FRACTIONS ; SPIRAL GALAXIES ; DISK GALAXIES ; CHEMICAL EVOLUTION ; OXYGEN ABUNDANCES ; LOCAL UNIVERSE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000398745600007 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8225]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China 2.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Du, Wei,Wu, Hong,Zhu, Yinan,et al. Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies[J]. ASTROPHYSICAL JOURNAL,2017,837(2). |
| APA | Du, Wei.,Wu, Hong.,Zhu, Yinan.,Zheng, WeiKang.,Filippenko, Alexei V..,...&Du,Wei.(2017).Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies.ASTROPHYSICAL JOURNAL,837(2). |
| MLA | Du, Wei,et al."Long-slit Spectroscopy of Edge-on Low Surface Brightness Galaxies".ASTROPHYSICAL JOURNAL 837.2(2017). |
入库方式： OAI收割
来源：国家天文台
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