论文标题
T-Rex的狼蛛星云中早期型星的X射线特性
X-ray properties of early-type stars in the Tarantula Nebula from T-ReX
论文作者
论文摘要
我们通过比较T-Rex之间的比较，Chandra ACIS X射线对LMC中的狼蛛NEBULA的调查，重新评估历史$ L_ {X}/L_ {X}/L_ {BOL} $的关系，以及主要从VLT/FLAMES，VLT/HEST/STIS STIS/HEST/HESS SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SURE SER s supers Spectroscocic分析。对于有107个共同的来源（有些是多个恒星的主机），其中大多数是横度光发光的（40％超过$ 10^6 l _ {\ odot} $），我们发现平均$ \ log l_ {x} /l_ {x} /l_ {bol} = -6.90 \ pm pm 0.65 $ 0.65 $。排除极端系统MK 34（WN5H+WN5H），R140A（WC4+WN6+）和VFTS 399（O9 IIIN+？），以及四个具有异常硬X射线组件的WR来源l_ {x}/l_ {bol} = -7.00 \ pm 0.49 $，与银河ob恒星非常吻合。单个系统和二进制系统（OF/wn和WR恒星）之间没有发现差异，尽管似乎确实有一种趋势，即通过O（Super）巨头，/Wn Stars和WR恒星的O（Super）巨头，X射线发射的趋势。在T-Rex点源目录中未检测到狼蛛中的大多数已知OB星，因此我们为所有未发现的OB恒星提供了上限，该log $ l_ {bol}/l _ {\ odot} \ geq 5.0 $。使用检测到的和上限log $ l_ {x}/l_ {bol} $值的生存分析表明，LMC和Carina Nebula中发光O恒星之间没有显着差异。该分析表明，金属性不会强烈影响$ l_ {x}/l_ {bol} $。狼蛛中的单个，发光的恒星的等离子温度（$ \叠加{kt_ {m}} = 1.0 $ keV）高于Carina中的同行（$ \ overline {kt_ {m}}} = 0.5 $ kev）。
We reassess the historical $L_{X}/L_{Bol}$ relation for early-type stars from a comparison between T-ReX, the Chandra ACIS X-ray survey of the Tarantula Nebula in the LMC, and contemporary spectroscopic analysis of massive stars obtained primarily from VLT/FLAMES, VLT/MUSE and HST/STIS surveys. For 107 sources in common (some host to multiple stars), the majority of which are bolometrically luminous (40% exceed $10^6 L_{\odot}$), we find an average $\log L_{X} /L_{Bol} = -6.90 \pm 0.65$. Excluding extreme systems Mk 34 (WN5h+WN5h), R140a (WC4+WN6+) and VFTS 399 (O9 IIIn+?), plus four WR sources with anomalously hard X-ray components (R130, R134, R135, Mk 53) and 10 multiple sources within the spatially crowded core of R136a, $\log L_{X}/L_{Bol} = -7.00 \pm 0.49$, in good agreement with Galactic OB stars. No difference is found between single and binary systems, nor between O, Of/WN and WR stars, although there does appear to be a trend towards harder X-ray emission from O dwarfs, through O (super)giants, Of/WN stars and WR stars. The majority of known OB stars in the Tarantula are not detected in the T-ReX point source catalogue, so we have derived upper limits for all undetected OB stars for which log $L_{Bol}/L_{\odot} \geq 5.0$. A survival analysis using detected and upper-limit log $L_{X}/L_{Bol}$ values indicates no significant difference between luminous O stars in the LMC and the Carina Nebula. This analysis suggests that metallicity does not strongly influence $L_{X}/L_{Bol}$. Plasma temperatures for single, luminous O stars in the Tarantula ($\overline{kT_{m}}=1.0$ keV) are higher than counterparts in Carina ($\overline{kT_{m}}=0.5$ keV).
