What powers Ly alpha blobs?
文献类型：期刊论文
| 作者 | Ao, Y.1,2; Matsuda, Y.1; Beelen, A.3; Henkel, C.4,5; Cen, R.6; De Breuck, C.7; Francis, P. J.8; Kovacs, A.9; Lagache, G.10; Lehnert, M.11,12 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 581 |
| 关键词 | galaxies: formation galaxies: high-redshift galaxies: ISM galaxies: active infrared: galaxies |
| 英文摘要 | Ly alpha blobs (LABs) are spatially extended Ly alpha nebulae seen at high redshift. The origin of Ly alpha emission in the LABs is still unclear and under debate. To study their heating mechanism(s), we present Australia Telescope Compact Array (ATCA) observations of the 20 cm radio emission and Herschel PACS and SPIRE measurements of the far-infrared (FIR) emission toward the four LABs in the protocluster J2143-4423 at z = 2.38. Among the four LABs, B6 and B7 are detected in the radio with fluxes of 67 +/- 17 mu Jy and 77 +/- 16 mu Jy, respectively, and B5 is marginally detected at 3 sigma (51 +/- 16 mu Jy). For all detected sources, their radio positions are consistent with the central positions of the LABs. Among them, B6 and B7 are obviously also detected in the FIR. By fitting the data with different templates, we obtained redshifts of 2.20(-0:35)(+0:30) for B6 and 2.20(-0:30)(+0:45) for B7, which are consistent with the redshift of the Ly alpha emission within uncertainties, indicating that both FIR sources are likely associated with the LABs. The associated FIR emission in B6 and B7 and high star formation rates strongly favor star formation in galaxies as an important powering source for the Ly alpha emission in both LABs. However, the other two, B1 and B5, are predominantly driven by the active galactic nuclei or other sources of energy still to be specified, but not mainly by star formation. In general, the LABs are powered by quite diverse sources of energy. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMING GALAXIES ; BROAD-BAND SURVEY ; EQUAL-TO 2.3 ; HIGH-REDSHIFT ; EMITTING GALAXIES ; COLD ACCRETION ; RADIO GALAXIES ; MASSIVE GALAXY ; DEEP SURVEY ; Z=3.1 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000361803900132 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14818]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France 4.MPIfR, D-53121 Bonn, Germany 5.King Abdulaziz Univ, Dept Astron, Jeddah 21589, Saudi Arabia 6.Princeton Univ Observ, Princeton, NJ 08544 USA 7.European So Observ, D-85748 Garching, Germany 8.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 0200, Australia 9.CALTECH, Pasadena, CA 91125 USA 10.Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France |
| 推荐引用方式 GB/T 7714 | Ao, Y.,Matsuda, Y.,Beelen, A.,et al. What powers Ly alpha blobs?[J]. ASTRONOMY & ASTROPHYSICS,2015,581. |
| APA | Ao, Y..,Matsuda, Y..,Beelen, A..,Henkel, C..,Cen, R..,...&Zheng, Z..(2015).What powers Ly alpha blobs?.ASTRONOMY & ASTROPHYSICS,581. |
| MLA | Ao, Y.,et al."What powers Ly alpha blobs?".ASTRONOMY & ASTROPHYSICS 581(2015). |
入库方式： OAI收割
来源：紫金山天文台
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