Hydrogen two-photon continuum emission from the Horseshoe filament in NGC 1275

被引：10
作者：
Johnstone, R. M. [1 ]
Canning, R. E. A. [1 ]
Fabian, A. C. [1 ]
Ferland, G. J. [2 ]
Lykins, M. [2 ]
Porter, R. L. [3 ,4 ]
van Hoof, P. A. M. [5 ]
Williams, R. J. R. [6 ]
机构：
[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[2] Univ Kentucky, Dept Phys, Lexington, KY 40506 USA
[3] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA
[4] Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA
[5] Royal Observ Belgium, B-1180 Brussels, Belgium
[6] AWE Plc, Reading RG7 4PR, Berks, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 425卷 / 02期
基金：
美国国家科学基金会; 英国科学技术设施理事会;
关键词：
galaxies: clusters: individual: Perseus; galaxies: individual: NGC 1275; intergalactic medium; ultraviolet: ISM; BRIGHTEST CLUSTER GALAXIES; FAR-ULTRAVIOLET OBSERVATIONS; SPACE-TELESCOPE; STAR-FORMATION; MOLECULAR-HYDROGEN; OUTER FILAMENTS; NGC-1275; NEBULAE; ORIGIN; DISCOVERY;
D O I：
10.1111/j.1365-2966.2012.21597.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Far-ultraviolet emission has been detected from a knot of Ha emission in the Horseshoe filament, far out in the NGC 1275 nebula. The flux detected relative to the brightness of the Ha line in the same spatial region is very close to that expected from hydrogen two-photon continuum emission in the particle heating model of Ferland et al. if reddening internal to the filaments is taken into account. We find no need to invoke other sources of far-ultraviolet emission such as hot stars or emission lines from C?iv in intermediate-temperature gas to explain these data.
引用
收藏
页码：1421 / 1429
页数：9
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