On the origin and excitation of the extended nebula surrounding NGC 1275
We use line-of-sight velocity information on the filamentary emission-line nebula of NGC 1275 to infer a dynamical model of the nebula's flow through the surrounding intracluster gas. We detect outflowing gas and flow patterns that match simulations of buoyantly rising bubbles from which we ded...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2006-04, Vol.367 (2), p.433-448 |
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| container_title | Monthly notices of the Royal Astronomical Society |
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| creator | Hatch, N. A. Crawford, C. S. Johnstone, R. M. Fabian, A. C. |
| description | We use line-of-sight velocity information on the filamentary emission-line nebula of NGC 1275 to infer a dynamical model of the nebula's flow through the surrounding intracluster gas. We detect outflowing gas and flow patterns that match simulations of buoyantly rising bubbles from which we deduce that some of the nebula filaments have been drawn out of NGC 1275. We find a radial gradient of the ratio [N ii]λ6584/Hα which may be due to a variation in metallicity, interactions with the surrounding intracluster medium or a hardening of the excitation mechanism. We find no preferred spatial correlation of stellar clusters within the filaments and there is a notable lack of [O iii]λ5007 emission, therefore it is unlikely that the filaments are ionized by stellar ultraviolet. |
| doi_str_mv | 10.1111/j.1365-2966.2006.09970.x |
| format | Article |
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| subjects | Astronomy Astrophysics cooling flows Earth, ocean, space Exact sciences and technology Flow velocity galaxies: clusters: individual: Perseus galaxies: individual: NGC 1275 intergalactic medium Mathematical models Nebulae |
| title | On the origin and excitation of the extended nebula surrounding NGC 1275 |
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