Ultra-metal-poor Stars: Spectroscopic Determination of Stellar Atmospheric Parameters Using Iron Non-LTE Line Abundances
We present new ultra-metal-poor stars parameters with [Fe/H] < -4.0 based on line-by-line non-local thermodynamic equilibrium (NLTE) abundances using an up-to-date iron model atom with a new recipe for non-elastic hydrogen collision rates. We study the departures from LTE in their atmospheric par...
Main Authors: | , , |
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Other Authors: | , |
Format: | Article |
Language: | English |
Published: |
IOP Publishing,
2018-04-25T19:45:49Z.
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Subjects: | |
Online Access: | Get fulltext |