The bar-enhanced star-formation activities in spiral galaxies
文献类型：期刊论文
| 作者 | Huang, JH; Gu, HJ; Su, HJ; Hawarden, TG; Liao, XH; Wu, GX |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 1996-09-01 |
| 卷号 | 313期号:1页码:13-24 |
| 关键词 | galaxies, starburst galaxies, spiral infrared, galaxies |
| ISSN号 | 0004-6361 |
| 英文摘要 | We use the ratio L(FIR)/L(B) and the IRAS color index S-25/S-12 (both widely used as indices of relative star formation rates in galaxies) to analyse subsets (containing no known AGNs or merging/interacting galaxies) of: (a) the IRAS Bright Galaxy Sample, (b) galaxies from the optically complete RSA sample which have IRAS detections in all four bands, and (c) a volume-limited IR-unselected sample. We confirm that IR-bright barred (SB) galaxies do, on average, have very significantly higher values of the FIR-optical and S-25/S-12 ratios (and presumably, higher relative star formation rates, SFR) than that do unbarred ones; the effect is most obvious in the IR colors. We also confirm that these differences are confined to early-type (SO/a - Sbc) spirals and are not evident among late-type systems (Sc - Sdm). Unlike others, we see no enhancement of the SFR in weakly-barred (SAB) galaxies. We further confirm that the effect of bars on the SFR is associated with the relative IR luminosity and show that it is detectable only in galaxies with L(FIR)/L(B) greater than or similar to 1/3, suggesting that as soon as they have any effect, bars translate their host galaxies into this relatively IR-luminous group. Conversely, for galaxies with L(FIR)/L(B) below similar to 0.1 this luminosity ratio is lower among barred than unbarred systems, again confirming and quantifying an earlier result. Although there is no simple physical relation between Hr content and star formation, a strong correlation of H I content with the presence of bars has been found for early-type spirals with L(FIR)/L(B) greater than or similar to 1/3 This suggests that the availability of fuel is the factor determining just which galaxies undergo bar-induced starbursts. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | IRAS OBSERVATIONS ; SEYFERT-GALAXIES ; GAS-DYNAMICS ; NUCLEI ; LUMINOSITY ; EMISSION ; QUASARS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1996VG16900005 |
| 公开日期 | 2013-02-05 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/8452]  |
| 专题 | 紫金山天文台_期刊（老文献） |
| 作者单位 | 1.PURPLE MT OBSERV, NANJING, PEOPLES R CHINA 2.JOINT ASTRON CTR, HILO, HI 96720 USA 3.ROYAL OBSERV, EDINBURGH EH9 3HJ, MIDLOTHIAN, SCOTLAND |
| 推荐引用方式 GB/T 7714 | Huang, JH,Gu, HJ,Su, HJ,et al. The bar-enhanced star-formation activities in spiral galaxies[J]. ASTRONOMY & ASTROPHYSICS,1996,313(1):13-24. |
| APA | Huang, JH,Gu, HJ,Su, HJ,Hawarden, TG,Liao, XH,&Wu, GX.(1996).The bar-enhanced star-formation activities in spiral galaxies.ASTRONOMY & ASTROPHYSICS,313(1),13-24. |
| MLA | Huang, JH,et al."The bar-enhanced star-formation activities in spiral galaxies".ASTRONOMY & ASTROPHYSICS 313.1(1996):13-24. |
入库方式： OAI收割
来源：紫金山天文台
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