Chapter describes the HydraI spectroscopy. Chapter starts with a summary of the HydraI data and a presentation of the Coma data. Then the analysis is presented. Finally, in Chapter the conclusions are given. Appendix gives details of the basic reductions of the photometry.
Appendix gives details of the surface photometry.
Appendix describes the standard calibration of the photometry. Appendix lists the Coma data. Appendix shows images of the 35 fields on the sky in which the galaxies in the HydraI surface photometry sample are located. The data used in the analysis will still be introduced in Sect. .