What celestial bodies are classified below the $0.075 M_{\odot}$ mass limit, failing stable hydrogen fusion?
Answer
Brown dwarfs
The threshold for being classified as a true star—one capable of sustaining core hydrogen fusion—is astronomically set around $0.075$ solar masses ($M_{\odot}$). Any object falling below this mass constraint fails to generate the necessary core pressure and temperature to maintain this standard fusion process. These substellar objects are categorized as brown dwarfs. While they are more massive than planets and can sometimes briefly fuse deuterium, they cannot stabilize hydrogen burning, causing them to slowly cool and fade, distinguishing them fundamentally from main-sequence stars.
#Videos
The Smallest Stars in the Universe - Red Dwarfs - YouTube
What Types Of Dwarf Star Are There? - YouTube
Related Questions
What is the critical lower mass limit ($M_{\odot}$) for sustained core hydrogen fusion defining a true red dwarf star?How does the radius of EBLM J0555-57Ab compare to the radius of Jupiter?What is the maximum estimated lifespan for the smallest red dwarfs due to their slow fuel consumption?On the Hertzsprung-Russell (H-R) diagram, where do red dwarfs typically occupy?What celestial bodies are classified below the $0.075 M_{\odot}$ mass limit, failing stable hydrogen fusion?What structural feature characterizes the smallest red dwarfs, enabling almost total hydrogen consumption?Which spectral classes define the smallest true stars, according to astronomical precision?Approximately what fraction of all stars in the Milky Way are estimated to be red dwarfs?What is the approximate surface temperature ($ ext{K}$) of our Sun, a yellow dwarf?What core temperature ($ ext{K}$) is necessary to sustain conventional hydrogen fusion defining a true star?