Ionization Instability Driven Outbursts in SXTs

Abstract We study the hydrogen ionization instability mechanism in context of low-mass X-ray binaries with a black hole as central object. make numerical calculations predicted outbursts’ light curves and compare them to data observed by satellites. The comparison is done for five sources RXTE/ASM (XTE J1550−564, 4U 1630−472, XTE J1859+226, GX 339-4, J1818−245) one source MAXI (MAXI J1659−152). aim this paper show that operating an accretion disk responsible shape outbursts binaries. From fitting process, we put tight constraints on global parameters such mass rate. influence chemical composition overall analysis also shown. In case each outburst, found bolometric curve qualitatively matches data. were able model main outburst secondary reflare often seen data, latter caused presence metals gas. analyzed two outbursts, which allowed us 4 ± 0.5 M ⊙ rate yr −1 .