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Powerful high-velocity dispersion molecular hydrogen associated with an intergalactic shock wave in Stephan's Quintet
文献类型：期刊论文
| 作者 | Appleton, PN; Xu, KC; Reach, W; Dopita, MA; Gao, Y ; Lu, N; Popescu, CC; Sulentic, JW; Tuffs, RJ; Yun, MS
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2006-03-10 |
| 卷号 | 639期号:2页码:L51-L54 |
| 关键词 | galaxies : evolution galaxies : individual ( NGC 7318b) galaxies : interactions intergalactic medium |
| ISSN号 | 0004-637X |
| 英文摘要 | We present the discovery of strong mid-infrared emission lines of molecular hydrogen of apparently highvelocity dispersion (similar to 870 km s(-1)) originating from a group-wide shock wave in Stephan's Quintet. These Spitzer Space Telescope observations reveal emission lines of molecular hydrogen and little else. This is the first time an almost pure H 2 line spectrum has been seen in an extragalactic object. Along with the absence of PAH-dust features and very low excitation ionized gas tracers, the spectra resemble shocked gas seen in Galactic supernova remnants, but on a vast scale. The molecular emission extends over 24 kpc along the X-ray-emitting shock front, but it has 10 times the surface luminosity as the soft X-rays and about one-third the surface luminosity of the IR continuum. We suggest that the powerful H-2 emission is generated by the shock wave caused when a highvelocity intruder galaxy collides with filaments of gas in the galaxy group. Our observations suggest a close connection between galaxy-scale shock waves and strong broad H-2 emission lines, like those seen in the spectra of ultraluminous infrared galaxies where high-speed collisions between galaxy disks are common. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPITZER-SPACE-TELESCOPE ; INFRARED SPECTROGRAPH IRS ; SPECTRAL SIGNATURES ; STAR-FORMATION ; EMISSION ; GALAXIES ; STARBURST ; NGC-6240 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000235837200002 |
| 公开日期 | 2012-02-07 |
| 源URL | [http://159.226.72.40/handle/332002/3530]  |
| 专题 | 紫金山天文台_星系中的恒星形成研究团组 |
| 作者单位 | 1.CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA 2.CALTECH, IPAC, Pasadena, CA 91125 USA 3.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 5.Max Planck Inst Kernphys, D-69117 Heidelberg, Germany 6.Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA 7.Univ Massachusetts, Dept Astron, Amherst, MA 01002 USA |
| 推荐引用方式 GB/T 7714 | Appleton, PN,Xu, KC,Reach, W,et al. Powerful high-velocity dispersion molecular hydrogen associated with an intergalactic shock wave in Stephan's Quintet[J]. ASTROPHYSICAL JOURNAL,2006,639(2):L51-L54. |
| APA | Appleton, PN.,Xu, KC.,Reach, W.,Dopita, MA.,Gao, Y.,...&Yun, MS.(2006).Powerful high-velocity dispersion molecular hydrogen associated with an intergalactic shock wave in Stephan's Quintet.ASTROPHYSICAL JOURNAL,639(2),L51-L54. |
| MLA | Appleton, PN,et al."Powerful high-velocity dispersion molecular hydrogen associated with an intergalactic shock wave in Stephan's Quintet".ASTROPHYSICAL JOURNAL 639.2(2006):L51-L54. |
入库方式： OAI收割
来源：紫金山天文台
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