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Coronal Modulation in the Ultra-fast Rotator LO Peg

Pandey, Jeewan Chandra; Singh, Gurpreet; Yadava, Umesh

We present coronal imaging of the ultra-fast rotator, LO Peg, using the X-ray observations from XMM-Newton. The X-ray light curves show one strong flare at the end of observation, as reported in an earlier study. On removal of flaring events, the quiescent state light curve shows rotational modulations, which are modelled using a maximum likelihoo…

X-raying the wind-wind collisions in HD 168112 and HD 167971

Blomme, R.; Nazé, Y.; Rauw, G. +1 more

The O-type long-period binary HD 168112 and triple HD 167971 star systems have been known for several decades for their non-thermal synchrotron radio emission. This emission arises from relativistic electrons accelerated in the hydrodynamic shocks of the wind collisions in these systems. Such wind collisions are expected to produce a strong X-ray …