RADIUS-EXPANSION BURST SPECTRA FROM 4U 1728โ34: AN ULTRACOMPACT BINARY?
RADIUS-EXPANSION BURST SPECTRA FROM 4U 1728โ34: AN ULTRACOMPACT BINARY?
Recent theoretical and observational studies have shown that ashes from thermonuclear burning may be ejected during radius-expansion bursts, giving rise to photoionization edges in the X-ray spectra. We report a search for such features in Chandra spectra observed from the low-mass X-ray binary 4U 1728โ34. We analyzed the spectra from โฆ