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arxiv astro-ph/0107377 v3 pith:NBTDUINZ submitted 2001-07-19 astro-ph

Monte Carlo transition probabilities

classification astro-ph
keywords carlomonteprobabilitiesemissivityequilibriumstatisticaltransitionaddition
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Transition probabilities governing the interaction of energy packets and matter are derived that allow Monte Carlo NLTE transfer codes to be constructed without simplifying the treatment of line formation. These probabilities are such that the Monte Carlo calculation asymptotically recovers the local emissivity of a gas in statistical equilibrium. Numerical experiments with one-point statistical equilibrium problems for Fe II and Hydrogen confirm this asymptotic behaviour. In addition, the resulting Monte Carlo emissivities are shown to be far less sensitive to errors in the populations of the emitting levels than are the values obtained with the basic emissivity formula.

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Cited by 3 Pith papers

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    astro-ph.GA 2026-07 accept novelty 6.0

    A moment-based hierarchy (zeroth, first, second order) diagnoses convergence of Lyman-alpha MCRT momentum-transfer estimators, showing that core-skipping biases internal forces and that statistical precision, cost, an...

  3. On the quenching of LRD X-ray emission by both Compton-thick gas and high accretion rates

    astro-ph.GA 2026-05 unverdicted novelty 5.0

    LRDs require Compton-thick gas at moderate metallicity plus high accretion rates producing weak X-rays to explain their non-detection, implying they are not chemically pristine.