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: September 24, 2022
Published on:
Abstract
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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