PoS - Proceedings of Science
Volume 425 - The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022) - Stars and interstellar medium
Wind parameters of the new LBV in NGC1156
Y.N. Solovyeva*, A. Kostenkov, E. Dedov and A. Vinokurov
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Pre-published on: December 08, 2022
Published on: December 14, 2022
In this work we present spectrum modeling results for the new discovered luminous blue variable (LBV) in the NGC 1156 galaxy. Extended atmosphere models were calculated using the non-LTE code CMFGEN. We have obtained the luminosity of discovered LBV $L\simeq (1.6\pm0.2) \times 10^{5} L_{\odot}$, the effective temperature $T_{\text{eff}}=7.9\pm0.4$ kK and mass-loss rate $\dot{M}f^{-0.5}= (8.2\pm1.0) \times 10^{-4}\,M_{\odot}\,\text{yr}^{-1}$. Hydrogen abundance in the wind is $\approx20$% for the metallicity $Z=0.5 Z_{\odot}$ of the host galaxy.
DOI: https://doi.org/10.22323/1.425.0049
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