STAR FORMATION LAWS IN BOTH GALACTIC MASSIVE CLUMPS AND EXTERNAL GALAXIES: EXTENSIVE STUDY WITH DUST CONINUUM, HCN (4-3), AND CS (7-6)
文献类型：期刊论文
| 作者 | Liu, Tie1; Kim, Kee-Tae1; Yoo, Hyunju1,2; Liu, Sheng-Yuan3; Tatematsu, Ken'ichi4; Qin, Sheng-Li5,6; Zhang, Qizhou7; Wu, Yuefang8; Wang, Ke9; Goldsmith, Paul F.10 |
| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-10-01 |
| 卷号 | 829期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Galaxies: Evolution Galaxies: Ism Ism: Kinematics And Dynamics Stars: Formation |
| DOI | 10.3847/0004-637X/829/2/59 |
| 英文摘要 | We observed 146 Galactic clumps in HCN (4-3) and CS (7-6) with the Atacama Submillimeter Telescope Experiment 10 m telescope. A tight linear relationship between star formation rate and gas mass traced by dust continuum emission was found for both Galactic clumps and the high redshift (z > 1) star forming galaxies (SFGs), indicating a constant gas depletion time of similar to 100 Myr for molecular gas in both Galactic clumps and high z SFGs. However, low z galaxies do not follow this relation and seem to have a longer global gas depletion time. The correlations between total infrared luminosities (L-TIR) and molecular line luminosities (L-mol') of HCN (4-3) and CS (7-6) are tight and sublinear extending down to clumps with L-TIR similar to 10(3) L-circle dot. These correlations become linear when extended to external galaxies. A bimodal behavior in the L-TIR-L-mol' correlations was found for clumps with different dust temperature, luminosity-to-mass ratio, and sigma(line)/sigma(vir). Such bimodal behavior may be due to evolutionary effects. The slopes of L-TIR-L-mol' correlations become more shallow as clumps evolve. We compared our results with lower J transition lines in Wu et al. (2010). The correlations between clump masses and line luminosities are close to linear for low effective excitation density tracers but become sublinear for high effective excitation density tracers for clumps with L-TIR larger than L-TIR similar to 10(4.5) L-circle dot. High effective excitation density tracers cannot linearly trace the total clump masses, leading to a sublinear correlations for both M-clump-L-mol' and L-TIR-L-mol' relations. |
| WOS关键词 | ULTRALUMINOUS INFRARED GALAXIES ; DENSE GAS TRACERS ; HIGH-J CO ; MOLECULAR CLOUDS ; FORMING REGIONS ; COMPLETE SAMPLE ; FORMATION RATES ; MILKY-WAY ; LUMINOSITY ; CONTINUUM |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000385377200001 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23603]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Liu, Tie |
| 作者单位 | 1.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea 2.Chungnam Natl Univ, Dept Astron & Space Sci, Daejeon, South Korea 3.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan 4.Natl Astron Observ Japan, Natl Inst Nat Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 5.Yunnan Univ, Dept Astron, Kunming 650091, Peoples R China 6.Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Peoples R China 7.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 8.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 9.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 10.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA |
| 推荐引用方式 GB/T 7714 | Liu, Tie,Kim, Kee-Tae,Yoo, Hyunju,et al. STAR FORMATION LAWS IN BOTH GALACTIC MASSIVE CLUMPS AND EXTERNAL GALAXIES: EXTENSIVE STUDY WITH DUST CONINUUM, HCN (4-3), AND CS (7-6)[J]. ASTROPHYSICAL JOURNAL,2016,829(2). |
| APA | Liu, Tie.,Kim, Kee-Tae.,Yoo, Hyunju.,Liu, Sheng-Yuan.,Tatematsu, Ken'ichi.,...&Schnee, Scott.(2016).STAR FORMATION LAWS IN BOTH GALACTIC MASSIVE CLUMPS AND EXTERNAL GALAXIES: EXTENSIVE STUDY WITH DUST CONINUUM, HCN (4-3), AND CS (7-6).ASTROPHYSICAL JOURNAL,829(2). |
| MLA | Liu, Tie,et al."STAR FORMATION LAWS IN BOTH GALACTIC MASSIVE CLUMPS AND EXTERNAL GALAXIES: EXTENSIVE STUDY WITH DUST CONINUUM, HCN (4-3), AND CS (7-6)".ASTROPHYSICAL JOURNAL 829.2(2016). |
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来源：紫金山天文台
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