Quantum-mechanical (QM) calculations of the binding-energy (BE) distribution of OCS on ice grains are calculated to know at what temperature OCS sublimates. Binding Energy is the amount of energy needed to pull a molecule (like OCS) off the surface of a dust grain or ice grain.
K dec is(sublimation) rate — how fast OCS leaves the ice
This formula tells researchers at what temperature OCS evaporates off dust grains.
In cold protostellar envelopes (10–20 K), OCS molecules stick to icy dust grains. Molecular line observations are measured to map where OCS is in the gas phase around each protostar.
Radiative-transfer and dust–gas thermal modelling calculations of the protostellar envelope are done to compute a temperature profile T(r) at given luminosity, and OCS sublimation radius is calculated. The density profile is also calculated.
T(r) Dust temperature at distance r from the protostar is calculated as
Iv is observed intensity calculated from below equation,
Here, Bv is plank function, Tv optical depth of OCS line, it is calculated from density profile given below
Researchers found both young stars in binary have very similar luminosities, around 7 times the Sun’s brightness each.
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