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Applied Mathematics and Nonlinear Sciences

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Available online: December 25, 2017

Model atmosphere analysis of two new early-type O4 dwarfs stars

D.A. Fouda, M. Hamdy, M. Nouh, M. Beheary, Abdelaziz Bakrey, S.M. Saad
Volume 2 - Issue 2.     Year 2017.     Pages 559–564.

DOI: 10.21042/AMNS.2017.2.00046


We present a synthetic spectra study of two new galactic early-type O4 dwarf stars $($ ALS 19618 and BD+50886 $)$ with high signal-to-noise ratio, typically $S/N \sim 300$, medium-rosalution $R \sim 2500$ optical spectra of O4 dwarfs stars from Galactic O-Stars Spectroscopic Survey $($GOSSS$)$, The main stellar parameters $($Teff, surface gravity, rotational velocity$)$ have been established using non-LTE, line-blanketed, atmospheric models calculated by TLUSTY204 and SYNSPEC49.

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Applied Mathematics, Nonlinear Sciences


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