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Astronomy · L4 · Which Young Stellar Object Class?

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A decision flow from a young stellar object's observed spectral energy distribution to its Class 0-III designation.

by @openstemUpdated Astronomy
Observe a young stellar object's spectral energy distributionAny light escapes outside the far-infrared?Class 0: deeply embeddedSubstantial infalling envelope remains?Class IStar still shows strong disk / accretion signatures?Class II / T Tauri starClass III: nearly bare starNo, entirely cold far-IR / submillimetreYes, some near/mid-IR escapesYesNo, but an optically visible disk remainsYesNo, disk largely gone

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