Astronomers at Caltech have discovered a double star whose components revolve about each other with record speed. The orbital period is only of 6.91 minutes. This publication reports Science Alert.
ZTF double star J1539+5027 consisting of white dwarfs (the remnants of ordinary stars), is 7.8 thousand light-years from Earth, the two components are the amount of space which could fit inside of Saturn. Mass one of the stars is 60 percent of the mass of the Sun, the mass of the other 20 percent. The second star to the larger of his companion, and therefore has a much lower density.
Because the less dense the star has a low brightness, gloss ZTF J1539+5027 falls every time she is on the background of the brighter component. The blackout period is only about seven minutes, a record that indicates the proximity of both sites to each other and that their rotation should give rise to gravitational waves. Both stars converge at a speed of 26 centimeters per day. Will be about 130 thousand years before the period is reduced to five minutes and the transfer of matter from one component to another will increase dramatically.
After that, ZTF J1539+5027 become either a star similar to the AM Canum Venaticorum with stable mass transfer, or in rare variable star R Coronae Borealis is a chaotically pulsating object, which is considered analogous to low-mass sne Ia when one of the partners explodes with increasing mass above a certain limit.
Video, photo All from Russia.