Wind parameters of the new LBV in NGC1156

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-13 DOI:10.22323/1.425.0049

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

引用次数: 0

Abstract

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 (cid:39) ( 1 . 6 ± 0 . 2 ) × 10 6 𝐿 (cid:12) , eﬀective temperature 𝑇 eﬀ = 7 . 9 ± 0 . 4 kK and mass-loss rate (cid:164) 𝑀 𝑓 − 0 . 5 = ( 8 . 2 ± 1 . 0 ) × 10 − 4 𝑀 (cid:12) yr − 1 . The hydrogen abundance in the wind is ≈ 20 % for the metallicity 𝑍 = 0 . 5 𝑍 (cid:12) of the host galaxy. The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022)

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NGC1156中新型LBV的风参数

在这项工作中，我们提出了在ngc1156星系中新发现的发光蓝变量(LBV)的光谱建模结果。使用非lte代码CMFGEN计算扩展大气模型。我们得到了发现的LBV的光度𝐿(cid:39)(1)。6±0。2) × 106𝐿(cid:12)，有效温度𝑇eff = 7。9±0。质量损失率(cid:164)𝑀𝑓−0。5 = (8)2±1。0) × 10−4𝑀(cid:12) yr−1。对于金属丰度𝑍= 0，风中的氢丰度≈20%。5𝑍(cid:12)。多面宇宙:理论与观测- 2022 (MUTO2022)

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Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)

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