Using NASA’s Chandra observatory and Europe’s XMM-Newton spacecraft, astronomers may have solved a 45-year-old cold case. The team of cosmic homicide detectives determined a strange X-ray signal is the dying scream of a planet destroyed by a superdense stellar corpse called a white dwarf. The signal, which originates from the heart of the Helix Nebula, … Read more
Having launched on January 9, 2024 by the Chinese Academy of Sciences, the Einstein Probe detected several new events during its commissioning phase. Last October, Yuan Weimin, the spacecraft’s principle investigator, told China Central Television that the X-ray observatory had already discovered around 60 very strong transient celestial objects, close to a thousand potential transients, … Read more
In what follows we provide additional details on a number of aspects of our analysis that we have omitted in the main text for compactness. These refer to the approach followed for the selection of the golden EOSs, the numerical techniques employed to simulate the binaries and extract the GW signal, and a number of … Read more