Speaker
Description
We present the analysis results of normal outbursts (NOBs) from Be/X-ray binary pulsars (BeXBPs) observed by the MAXI/GSC. Since August 2009, over 200 X-ray outbursts were detected over a period of 15 years. Using the data obtained by the MAXI/GSC, we investigated the NOB profiles of BeXBPs from onset to end. The ascent phases of the NOBs are approximated by a linear function, from which we derived the average flux increase rate for each NOB. The relation between the flux increase rate of NOBs and their peak flux can be characterized by a power-law function. Furthermore, we find that the power-law indexes correlate with the eccentricities of the binary orbits of BeXBPs. Utilizing this relation, the orbital eccentricity can be estimated from the NOB profiles of the BeXBP with unknown orbital parameters.
