Colloquium on Sep. 16, 2022

Using X-ray continuum-fitting to estimate the spin of MAXI J1305-704

Speaker:Ye Feng (NAOC)

Venue:SWIFAR Building, 2111

Time:12:30 PM, Friday, Sep. 16, 2022

Abstract:

MAXI J1305-704 is a transient X-ray binary with a black hole primary. It was discovered on April 9, 2012, during its only known outburst. MAXI J1305-704 is also a high inclination low-mass X-ray binary with prominent dip features in its light curves. From the full catalog of 92 Swift/XRT continuous observations of MAXI J1305-704, we select 13 "gold" spectra that match RMS <0.075 and fsc ≤ 25%. By utilizing the X-ray continuum fitting method with the relativistic thin disk model kerrbb2 and supplying the known dynamical binary system parameters, we find MAXI J1305-704 has a moderate spin (a*=0.87_(-0.12)^(+0.08)) at a 68.3% confidence level.