THE JAMES CLERK MAXWELL TELESCOPE NEARBY GALAXIES LEGACY SURVEY. II. WARM MOLECULAR GAS AND STAR FORMATION IN THREE FIELD SPIRAL GALAXIES
文献类型：期刊论文
| 作者 | Warren, B. E.1; Wilson, C. D.1; Israel, F. P.2; Serjeant, S.3; Bendo, G. J.4; Brinks, E.5; Clements, D. L.4; Irwin, J. A.6; Knapen, J. H.7; Leech, J.8 |
| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2010-05-01 |
| 卷号 | 714期号:1页码:571-588 |
| 关键词 | galaxies: individual (NGC 628, NGC 3521, NGC 3627) galaxies: ISM galaxies: kinematics and dynamics galaxies: spiral galaxies: star formation ISM: molecules |
| 英文摘要 | We present the results of large-area (12)CO J = 3-2 emission mapping of three nearby field galaxies, NGC 628, NGC 3521, and NGC 3627, completed at the James Clerk Maxwell Telescope as part of the Nearby Galaxies Legacy Survey. These galaxies all have moderate to strong (12)CO J = 3-2 detections over large areas of the fields observed by the survey, showing resolved structure and dynamics in their warm/dense molecular gas disks. All three galaxies were part of the Spitzer Infrared Nearby Galaxies Survey sample, and as such have excellent published multiwavelength ancillary data. These data sets allow us to examine the star formation properties, gas content, and dynamics of these galaxies on sub-kiloparsec scales. We find that the global gas depletion time for dense/warm molecular gas in these galaxies is consistent with other results for nearby spiral galaxies, indicating this may be independent of galaxy properties such as structures, gas compositions, and environments. Similar to the results from The Hi Nearby Galaxy Survey, we do not see a correlation of the star formation efficiency with the gas surface density consistent with the Schmidt-Kennicutt law. Finally, we find that the star formation efficiency of the dense molecular gas traced by (12)CO J = 3-2 is potentially flat or slightly declining as a function of molecular gas density, the (12)CO J = 3-2/J = 1-0 ratio (in contrast to the correlation found in a previous study into the starburst galaxy M83), and the fraction of total gas in molecular form. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000276701000045 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7681]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada 2.Leiden Univ, Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands 3.Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England 4.Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England 5.Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 6.Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON, Canada 7.Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain 8.Univ Oxford, Dept Phys, Oxford OX1 3RH, England 9.DRAO, Herzberg Inst Astrophys, Natl Res Council Canada, Penticton, BC V2A 6J9, Canada 10.Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands |
| 推荐引用方式 GB/T 7714 | Warren, B. E.,Wilson, C. D.,Israel, F. P.,et al. THE JAMES CLERK MAXWELL TELESCOPE NEARBY GALAXIES LEGACY SURVEY. II. WARM MOLECULAR GAS AND STAR FORMATION IN THREE FIELD SPIRAL GALAXIES[J]. ASTROPHYSICAL JOURNAL,2010,714(1):571-588. |
| APA | Warren, B. E..,Wilson, C. D..,Israel, F. P..,Serjeant, S..,Bendo, G. J..,...&Zhu, M..(2010).THE JAMES CLERK MAXWELL TELESCOPE NEARBY GALAXIES LEGACY SURVEY. II. WARM MOLECULAR GAS AND STAR FORMATION IN THREE FIELD SPIRAL GALAXIES.ASTROPHYSICAL JOURNAL,714(1),571-588. |
| MLA | Warren, B. E.,et al."THE JAMES CLERK MAXWELL TELESCOPE NEARBY GALAXIES LEGACY SURVEY. II. WARM MOLECULAR GAS AND STAR FORMATION IN THREE FIELD SPIRAL GALAXIES".ASTROPHYSICAL JOURNAL 714.1(2010):571-588. |
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来源：国家天文台
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