The McDonald Accelerating Stars Survey (MASS): Discovery of a Long-Period Substellar Companion Orbiting the Old Solar Analog HD 47127

03. 09 2021

Brown dwarfs

Unexpectedly old brown dwarf WISEA J153429.75-104303.3 detected nearby

Amateur astronomer Dan Caselden discovered new brown dwarf WISEA J153429.75-104303.3 just 50 light years away. Spectroscopic analysis of its light shows peculiar emission lines, unseen in similar objects. Scientists think it could be caused by its chemical composition, which could in turn indicate its age. According to a new study in the Astrophysical Journal Letters magazine it could be 10-13 billions years old.

19. 06 2021

Brown dwarfs

TOI–1278 B: SPIRou unveils a rare Brown Dwarf Companion in Close-In Orbit around an M dwarf

11. 05 2021

Stars

Binarity as the Origin of Long Secondary Periods in Red Giant Stars

12. 04 2021

Brown dwarfs

Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs