Wind parameters of the new LBV in NGC1156

Y. Solovyeva, A. Kostenkov, E. Dedov, A. Vinokurov

Submitted on 13 September 2022


In this work we present the spectrum modeling results for the newly 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 the discovered LBV L(1.6±0.2)×105L, effective temperature Teff=7.9±0.4 kK and mass-loss rate M˙f0.5=(8.2±1.0)×104Myr1. The hydrogen abundance in the wind is 20% for the metallicity Z=0.5Z of the host galaxy.


Comment: Submitted to Proceedings of Science. Conference "The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022)", 23-27 May 2022, SAO RAS, Nizhny Arkhyz, Russia

Subjects: Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Astrophysics of Galaxies