XRISM observatory astrophysical observations

The XRISM X-ray space observatory has provided new insights into high-energy astrophysical phenomena through distinct observations of black holes and pulsars.

Initial findings regarding the quasar H1821+643 revealed that winds driven by supermassive black holes are approximately 100 times more powerful than previous models suggested. These outflows, which extend roughly 300,000 light-years into space, create intense turbulence in hot gas that spreads far beyond galactic boundaries.

Subsequent observations of the high-mass X-ray binary system BP Crucis, located approximately 13,000 light-years away in the constellation Crux, have captured the first direct observation of stellar wind plasma falling onto a compact neutron star. The system involves the blue hypergiant star Wray 977—which is roughly 40 times the mass of the Sun—and the pulsar GX 301-2.

As the pulsar orbits the hypergiant every 41.5 days, its gravity captures the continuous stream of ionized gas emitted by the star, triggering powerful X-ray flares. Using XRISM’s spectroscopic capabilities, researchers identified iron-rich plasma moving toward the neutron star at speeds of approximately 540,000 kilometers per hour, providing new data on the accretion mechanics that drive high-energy outbursts in binary star systems.