UNVEILING THE PHYSICAL PROPERTIES AND KINEMATICS OF MOLECULAR GAS IN THE ANTENNAE GALAXIES (NGC 4038/9) THROUGH HIGH-RESOLUTION CO (J=3-2) OBSERVATIONS
文献类型：期刊论文
| 作者 | Ueda, Junko1,2,3; Iono, Daisuke1,3; Petitpas, Glen3; Yun, Min S.4; Ho, Paul T. P.3,5; Kawabe, Ryohei1; Mao, Rui-Qing6 ; Martin, Sergio7; Matsushita, Satoki5,8; Peck, Alison B.3,8
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-01-20 |
| 卷号 | 745期号:1页码:65(14pp) |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: individual (NGC 4038, NGC 4039) galaxies: interactions galaxies: ISM radio lines: galaxies |
| 英文摘要 | We present a similar to 1 '' (100 pc) resolution (CO)-C-12 (3-2) map of the nearby intermediate-stage interacting galaxy pair NGC 4038/9 (the Antennae galaxies) obtained with the Submillimeter Array. We find that half the CO (3-2) emission originates in the overlap region where most of the tidally induced star formation had been previously found in shorter wavelength images, with the rest being centered on each of the nuclei. The gross distribution is consistent with lower resolution single-dish images, but we show for the first time the detailed distribution of the warm and dense molecular gas across this galaxy pair at resolutions comparable to the size of a typical giant molecular complex. While we find that 58% (33/57) of the spatially resolved Giant Molecular Associations (a few x 100 pc) are located in the overlap region, only <= 30% spatially coincides with the optically detected star clusters, suggesting that the bulk of the CO (3-2) emission traces the regions with very recent or near future star formation activity. The spatial distribution of the CO (3-2)/CO (1-0) integrated brightness temperature ratios mainly ranges between 0.3 and 0.6, which suggests that on average the CO (3-2) line in the Antennae is not completely thermalized and similar to the average values of nearby spirals. A higher ratio is seen in both nuclei and the southern complexes in the overlap region. A higher radiation field associated with intense star formation can account for the nucleus of NGC 4038 and the overlap region, but the nuclear region of NGC 4039 shows relatively little star formation or active galactic nucleus activity and cannot be easily explained. We show kinematical evidence that the high line ratio in NGC 4039 is possibly caused by gas inflow into the counter-rotating central disk. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LUMINOUS INFRARED GALAXIES ; YOUNG STAR-CLUSTERS ; X-RAY SOURCES ; CHANDRA OBSERVATIONS ; SUBMILLIMETER ARRAY ; NEARBY GALAXIES ; DISK GALAXIES ; HIGH-REDSHIFT ; CLOUDS ; NGC-4038/4039 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300316600065 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/8020]  |
| 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 Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, Minamimaki, Nagano 3841305, Japan 2.Univ Tokyo, Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1330033, Japan 3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan 6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 7.European So Observ, Santiago 19, Chile 8.Joint ALMA Observ, Santiago 19, Chile 9.Univ Tokyo, Inst Astron, Mitaka, Tokyo 1810015, Japan 10.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ueda, Junko,Iono, Daisuke,Petitpas, Glen,et al. UNVEILING THE PHYSICAL PROPERTIES AND KINEMATICS OF MOLECULAR GAS IN THE ANTENNAE GALAXIES (NGC 4038/9) THROUGH HIGH-RESOLUTION CO (J=3-2) OBSERVATIONS[J]. ASTROPHYSICAL JOURNAL,2012,745(1):65(14pp). |
| APA | Ueda, Junko.,Iono, Daisuke.,Petitpas, Glen.,Yun, Min S..,Ho, Paul T. P..,...&Zhang, Qizhou.(2012).UNVEILING THE PHYSICAL PROPERTIES AND KINEMATICS OF MOLECULAR GAS IN THE ANTENNAE GALAXIES (NGC 4038/9) THROUGH HIGH-RESOLUTION CO (J=3-2) OBSERVATIONS.ASTROPHYSICAL JOURNAL,745(1),65(14pp). |
| MLA | Ueda, Junko,et al."UNVEILING THE PHYSICAL PROPERTIES AND KINEMATICS OF MOLECULAR GAS IN THE ANTENNAE GALAXIES (NGC 4038/9) THROUGH HIGH-RESOLUTION CO (J=3-2) OBSERVATIONS".ASTROPHYSICAL JOURNAL 745.1(2012):65(14pp). |
入库方式： OAI收割
来源：紫金山天文台
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