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题名: X-RAY EMISSION FROM THE TAFFY (VV254) GALAXIES AND BRIDGE
作者: Appleton, P. N.1; Lanz, L.1; Bitsakis, T.2; Wang, J.3, 4; Peterson, B. W.5; Lisenfeld, U.6; Alatalo, K.1, 7; Guillard, P.8, 9, 10; Boulanger, F.11; Cluver, M.12; Gao Yu(高煜)13; Helou, G.1; Ogle, P.1; Struck, C.14
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-10-20
卷号: 812, 期号:2
关键词: galaxies: individual (UGC 12914, UGC12915, VV254)
DOI: 10.1088/0004-637X/812/2/118
文章类型: Article
英文摘要: We present the first X-ray observations of the Taffy galaxies (UGC 12914/5) with the Chandra observatory and detect soft X-ray emission in the region of the gas-rich, radio-continuum-emitting Taffy bridge. The results are compared to Herschel observations of dust and diffuse [C II] line-emitting gas. The diffuse component of the Taffy bridge has an X-ray luminosity of LX(0.5-8 keV) = 5.4 x 10(39) erg s(-1), which accounts for 19% of the luminosity of the sum for the two galaxies. The total mass in hot gas is (0.8-1.3) x 10(8) M-circle dot, which is approximately 1% of the total (H I + H-2) gas mass in the bridge, and similar to 11% of the mass of warm molecular hydrogen discovered by Spitzer. The soft X-ray and dense CO-emitting gas in the bridge have offset distributions, with the X-rays peaking along the northwestern side of the bridge in the region where stronger far-IR dust and diffuse [C II] gas is observed by Herschel. We detect nine Ultra Luminous X-ray sources in the system, the brightest of which is found in the bridge, associated with an extragalactic H II region. We suggest that the X-ray-emitting gas has been shocked-heated to high temperatures and "splashed" into the bridge by the collision. The large amount of gas stripped from the galaxies into the bridge and its very long gas depletion timescale (>10 Gyr) may explain why this system, unlike most major mergers, is not a powerful IR emitter.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STAR-FORMATION RATE ; INTER-STELLAR MEDIUM ; STEPHANS QUINTET ; INFRARED GALAXIES ; INTERACTING GALAXIES ; STARBURST GALAXIES ; ANTENNAE GALAXIES ; MOLECULAR GAS ; GALACTIC SUPERWINDS ; INTERSTELLAR-MEDIUM
收录类别: SCI
项目资助者: National Aeronautics and Space Administration(GO3-14087X) ; National Aeronautics Space Administration(NAS8-03060) ; Jet Propulsion Laboratory, California Institute of Technology ; NASA - Space Telescope Science Institute(HST-HF2-51352.001) ; NASA(NAS5-26555) ; NSFC(11443003 ; 11473021)
语种: 英语
WOS记录号: WOS:000365206600030
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16046
Appears in Collections:星系中的恒星形成研究团组_期刊论文

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作者单位: 1.CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA
2.Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 70264, DF, Mexico
3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
4.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China
5.Univ Wisconsin Barron Cty, Rice Lake, WI 54868 USA
6.Univ Granada, Dept Fis Teor & Cosmos, Granada, Spain
7.Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
8.Univ Paris 06, Univ Paris 04, F-7095 Paris, France
9.CNRS, UMR, F-7095 Paris, France
10.Univ Paris 11, Inst Astrophys Spatiale, Orsay, France
11.Inst Astrophys Paris, F-75014 Paris, France
12.Univ Western Cape, Cape Town, South Africa
13.Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
14.Iowa State Univ, Ames, IA 50011 USA
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