Young Stellar Objects (YSOs)
Why in news?
A team from India's Aryabhatta Research Institute of Observational Sciences (ARIES) analyzed a decade of infrared data from NASA's WISE and NEOWISE satellites, revealing the turbulent early lives of YSOs.
Key Characteristics
- Young Stellar Objects (YSOs) are baby stars still growing inside thick clouds of gas and dust.
- They shine brightly in infrared light because the dust blocks normal light but lets heat through, making telescopes see their glow.
- These young stars shoot out powerful jets of gas from their poles, like fireworks exploding both ways, carving paths in the surrounding cloud.
- They have spinning disks of material around them, where planets might form later, and the star eats bits from this disk causing brightness flares.
Classification Stages
YSOs progress through phases based on spectral energy distribution (SED): Class 0/I (protostellar envelopes), Class II (disk-dominated, classical T Tauri-like), Class III (diskless, weak-line T Tauri-like), and transition disks. Massive YSOs, intermediate-mass ones, and brown dwarfs vary by mass.
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