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- W2625481508 abstract "We have analyzed the Chandra archival data of NGC 1132, a well-known fossil group, i.e. a system expected to be old and relaxed long after the giant elliptical galaxy assembly. Instead, the Chandra data reveal that the hot gas morphology is disturbed and asymmetrical, with a cold front following a possible bow shock. We discuss possible origins of the disturbed hot halo, including sloshing by a nearby object, merger, ram pressure by external hotter gas and nuclear outburst. We consider that the first two mechanisms are likely explanations for the disturbed hot halo, with a slight preference for a minor merger with a low impact parameter because of the match with simulations and previous optical observations. In this case, NGC 1132 may be a rare example of unusual late mergers seen in recent simulations. Regardless of the origin of the disturbed hot halo, the paradigm of the fossil system needs to be reconsidered." @default.
- W2625481508 created "2017-06-23" @default.
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- W2625481508 date "2018-01-31" @default.
- W2625481508 modified "2023-09-23" @default.
- W2625481508 title "Disturbed Fossil Group Galaxy NGC 1132" @default.
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- W2625481508 doi "https://doi.org/10.3847/1538-4357/aaa43a" @default.
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