28th August 2025 (12 Topics)
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Quadruple Star
Context:
Scientists have discovered a rare quadruple star system in the Milky Way comprising cold brown dwarfs orbiting red dwarf stars.
Quadruple Star System:
- Newly discovered system:UPM J0140-3551 AaBb.
- Consists of a pair of cold brown dwarfs orbiting a pair of young red dwarfs.
- Such configurations are rare and provide insights into stellar formation.
Brown Dwarfs:
- Brown dwarfs are substellar objects, often called “failed stars.”
- They form like stars from collapsing gas clouds but do not sustain hydrogen fusion due to insufficient mass.
- They are larger than planets (e.g., Jupiter) but smaller than stars.
- Mass range: ~13–80 Jupiter masses.
- They emit little visible light and mostly radiate in infrared.
Significance of the Discovery:
- Improves understanding of stellar evolution and planetary system formation.
- Shows that brown dwarfs can exist in multiple-star systems, not just as isolated single objects.
- Rare systems like this reduce uncertainties about low-mass object formation probability (chance < 5%).
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