X-ray Study of Classical Novae : V458Vul and V2491 Cyg

摘要

We conducted target of opportunity X-ray observations of the classical novae V458 Vulpeculae and V2491 Cygni using the Suzaku satellite. With a short exposure of ～20 ks each, we obtained well-exposed spectra, enriching unique data sets of the shock X-ray emission from classical novae. V458 Vulpeculae shows lots of emission lines with a ～1 keV plasma temperature, while V2491 Cygni shows an emission line from Fe with a ～3 keV plasma temperature and a hard X-ray component. We report the results of these observations in this proceedings.