ON THE GALACTIC SPIN OF BARRED DISK GALAXIES
文献类型：期刊论文
| 作者 | Cervantes-Sodi, Bernardo1,2; Li, Cheng1,2; Park, Changbom3; Wang, Lixin1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-09-20 |
| 卷号 | 775期号:1页码:19 |
| 关键词 | galaxies: fundamental parameters galaxies: general galaxies: spiral galaxies: statistics galaxies: structure |
| 英文摘要 | We present a study of the connection between the galactic spin parameter (lambda(d)) and the bar fraction in a volume-limited sample of 10,674 disk galaxies drawn from the Sloan Digital Sky Survey Data Release 7. The galaxies in our sample are visually classified into one of three groups: non-barred galaxies and galaxies hosting long or short bars, respectively. We find that the spin distributions of these three classes are statistically different, with galaxies hosting long bars having the lowest lambda(d) values, followed by non-barred galaxies, while galaxies with short bars present typically high spin parameters. The bar fraction presents its maximum at low to intermediate lambda(d) values for the case of long bars, while the maximum for short bars is at high lambda(d). This bimodality is in good agreement with previous studies finding longer bars hosted by luminous, massive, red galaxies with a low content of cold gas, while short bars were found in low luminosity, low mass, blue galaxies that were typically gas rich. In addition, the rise and fall of the bar fraction as a function of lambda(d), within the long-bar sample shown in our results, can be explained as a result of two competing factors: the self-gravity of the disk that enhances bar instabilities and the support by random motions, instead of ordered rotational motion, that prevents the formation/growth of bars. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CENTRAL MASS CONCENTRATIONS ; TULLY-FISHER RELATION ; DIGITAL SKY SURVEY ; SURFACE-BRIGHTNESS GALAXIES ; DARK-MATTER HALOS ; SPIRAL GALAXIES ; SECULAR EVOLUTION ; STAR-FORMATION ; STELLAR BARS ; COSMOLOGICAL SIMULATIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000324615800019 |
| 公开日期 | 2014-10-30 |
| 源URL | [http://119.78.226.72//handle/331011/15360]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Max Planck Inst Astrophys, Partner Grp, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Korea Inst Adv Study, Seoul 130722, South Korea |
| 推荐引用方式 GB/T 7714 | Cervantes-Sodi, Bernardo,Li, Cheng,Park, Changbom,et al. ON THE GALACTIC SPIN OF BARRED DISK GALAXIES[J]. ASTROPHYSICAL JOURNAL,2013,775(1):19. |
| APA | Cervantes-Sodi, Bernardo,Li, Cheng,Park, Changbom,&Wang, Lixin.(2013).ON THE GALACTIC SPIN OF BARRED DISK GALAXIES.ASTROPHYSICAL JOURNAL,775(1),19. |
| MLA | Cervantes-Sodi, Bernardo,et al."ON THE GALACTIC SPIN OF BARRED DISK GALAXIES".ASTROPHYSICAL JOURNAL 775.1(2013):19. |
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来源：上海天文台
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