Unveiling the Nature of Fossil Groups Through Progenitors
Abstract
Even though the first fossil group (FG) was discovered almost three decades ago their nature still remains unclear. The initial hypothesis that they are the remains of groups that lost energy through dynamical friction and have been undisturbed is not fully consistent with their typically lack the expected large cool cores. Recently developed techniques to measure the ICL coupled with good quality X-ray data suggest that FGs are systems that are indeed very old, probably having achieved the end of their merging tree. To corroborate this scenario we need to observe the phases prior to FG formation, or FG progenitors, of which extremely few systems exist with high quality X-ray and HST data for the analysis. We propose to observe the hottest, most suitable for Chandra FG progenitor, CSWA28.
- Publication:
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Chandra Proposal
- Pub Date:
- September 2022
- Bibcode:
- 2022cxo..prop.6404D
- Keywords:
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- Chandra Proposal ID #24800409