Distance determination to the Crab-like pulsar wind nebula G54.1+0.3 and the search for its supernova remnant shell
文献类型：期刊论文
| 作者 | Leahy, Denis A.1; Tian, Wenwu1,2 ; Wang, Q. D.3
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2008-10-01 |
| 卷号 | 136期号:4页码:1477-1481 |
| 关键词 | ISM : molecules radio continuum : ISM radio lines : ISM supernova remnants |
| 英文摘要 | We discovered a large-scale shell G53.9+0.2 around the Crab-like pulsar wind nebula (PWN) G54.1+0.3 with 1420 MHz continuum Very Large Array observations. This is confirmed by a new infrared (IR) image at 8 mu m from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire project, which reveals an intriguing IR shell just surrounding the large radio shell. We analyze the 21 cm Hi absorption spectra and (13)CO emission spectra toward PWN G54.1+0.3 and bright sources on both radio and IR shells. Continuous Hi absorption up to the tangent point and absence of negative Hi absorption features imply that PWN G54.1+0.3 has a distance beyond the tangent point but within the solar circle, i.e., 4.5-9 kpc. G54.1+0.3 is likely at a distance of similar or equal to 6.2 kpc due to the morphological association of the PWN with a CO molecular cloud at a velocity of similar or equal to 53 km s(-1), as revealed by high-resolution 13CO images. Based on the Hi absorption spectrum and recombination line velocity (similar or equal to 40 km s(-1)) of the bright H II region G54.09-0.06, which is on the IR shell, the IR shell is likely located at a distance of similar or equal to 7.3 kpc, which is also the distance of the associated large-scale radio shell. At this distance, the radio shell has a radius of similar to 30 pc. The radio shellmay be thermal and lack IR emission due to dust destruction, or it may be non-thermal and part of a newly found old supernova remnant. In either case, it is located at a distance different from PWN G54.1+0.3. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000259202800007 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7381]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada 2.CAS, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA |
| 推荐引用方式 GB/T 7714 | Leahy, Denis A.,Tian, Wenwu,Wang, Q. D.. Distance determination to the Crab-like pulsar wind nebula G54.1+0.3 and the search for its supernova remnant shell[J]. ASTRONOMICAL JOURNAL,2008,136(4):1477-1481. |
| APA | Leahy, Denis A.,Tian, Wenwu,&Wang, Q. D..(2008).Distance determination to the Crab-like pulsar wind nebula G54.1+0.3 and the search for its supernova remnant shell.ASTRONOMICAL JOURNAL,136(4),1477-1481. |
| MLA | Leahy, Denis A.,et al."Distance determination to the Crab-like pulsar wind nebula G54.1+0.3 and the search for its supernova remnant shell".ASTRONOMICAL JOURNAL 136.4(2008):1477-1481. |
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来源：国家天文台
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