Astronomers find TMTS J0526B, the smallest star ever, in a binary system, revealing insights into star evolution. Its existence confirms a two-decade-old theory.
A Look Back At First STARMUS Festival armenpress.am - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from armenpress.am Daily Mail and Mail on Sunday newspapers.
YEREVAN, JULY 25, ARMENPRESS. One of the most brilliant minds on the planet will gather in Armenia to celebrate science communication within the framework of the 6th Edition of STARMUS in September.
White dwarfs, the extremely dense remnants left behind by most stars after their death, are characterized by a mass comparable to that of the Sun compressed into the size of an Earth-like planet. In the resulting strong gravity, heavy elements sink towards the centre and the upper layer of the atmosphere contains only the lightest element present, usually hydrogen or helium1,2. Several mechanisms compete with gravitational settling to change a white dwarf’s surface composition as it cools3, and the fraction of white dwarfs with helium atmospheres is known to increase by a factor of about 2.5 below a temperature of about 30,000 kelvin4–8; therefore, some white dwarfs that appear to have hydrogen-dominated atmospheres above 30,000 kelvin are bound to transition to be helium-dominated as they cool below it. Here we report observations of ZTF J203349.8+322901.1, a transitioning white dwarf with two faces: one side of its atmosphere is dominated by hydrogen and
Newfound White Dwarf Has Different Compositions on Its Opposite Faces sci.news - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sci.news Daily Mail and Mail on Sunday newspapers.