Skip to main content

Posts

Showing posts from September 11, 2025

NASA Hubble Space Telescope Uncovers One of the Youngest Known Blue Straggler–White Dwarf Systems

Astronomers using the Hubble Space Telescope have discovered that the blue straggler star, a hot, young, massive star, in the image grows from the process of binary stars merging with one another in the globular cluster 47 Tucanae, which is located 15,300 light-years away from the Earth. The findings, posted August 28 on the arXiv preprint server, represent one of the youngest known blue straggler–white dwarf pairings. This yields a probe of the evolution of binaries in dense stellar systems and, therefore, the rate of close stellar encounters and mass transfer that will determine the star formation histories there. Hubble Witness to Rare Young White Dwarf Orbiting Blue Straggler BSS4 According to the research led by Elisabetta Reggiani of the University of Florence, Hubble ACS/SBC far-UV photometry was searched for, and a far hotter and bluer stellar counterpart, referred to here-after as BSS4, was identified. The less massive, and thus probably younger (accretion over the last 12 mil...