Analysis of the WN star WR 102c, its WR nebula, and the associated cluster of massive stars in the Sickle Nebula

Analysis of the WN star WR 102c, its WR nebula, and the associated cluster of massive stars in the Sickle Nebula
复制标题

WN 恒星 WR 102c、其 WR 星云以及镰状星云中相关大质量恒星星团的分析

DOI:
10.1051/0004-6361/201527692
复制
发表时间:
2016
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
通讯作者:
H. Todt
H. Todt
中科院分区:
--
文献类型:
--
作者:
M. Steinke;M. Steinke;L. Oskinova;W. Hamann;Andreas A C Sander;A. Liermann;H. Todt

文献摘要

参考文献

被引文献

相似文献

大质量的Wolf-Rayet类型恒星WR102C位于五胞星系团附近--五胞星团是银河系中心区域的三大质量星团之一。先前的研究表明,WR102C可能有一个尘埃星云,是与五线团有关的镰状星云的主要电离源之一。我们用ESO的VLT积分场光谱仪SINFONI获得了K波段的观测数据,提取了恒星光谱,并利用恒星大气模型进行了分析。我们的新分析取代了先前报道的WR 102C的结果。我们大幅下调了它的测辐射光度和氢含量。我们在WR102C附近发现了四颗早期的OB型恒星。这些恒星的径向速度与WR102C相似。我们认为这些恒星和WR102C属于一个总质量约为1000M太阳的不同星团。我们在弥漫的BR$\GAMA$发射的SINFONI图和HST的PA$\α$图像中发现了WR 102C附近的一个新的WR星云。不同位置的BR$\伽马线没有明显加宽,与WR 102C附近H II区其他地方的星云发射宽度相似。位于银河系中心区域的大质量恒星WR102C位于一个包含更多早期类型恒星的星团中。WR102C的恒星参数对于无氢的WN6恒星来说是典型的。我们新发现了WR102c周围的一个星云,它的形态与无氢WR星周围的其他星云相似,并提出该星云的形成与快速星风与WR102c前一个演化阶段抛出的物质的相互作用有关。
The massive Wolf-Rayet type star WR 102c is located near the Quintuplet Cluster - one of the three massive star clusters in the Galactic Center region. Previous studies indicated that WR 102c may have a dusty circumstellar nebula and is among the main ionizing sources of the Sickle Nebula associated with the Quintuplet cluster. We obtained observations with the ESO's VLT integral field spectrograph SINFONI in the K-band, extracted the stellar spectra, and analyzed them by means of stellar atmosphere models. Our new analysis supersedes the results reported for WR 102c previously. We significantly revise down its bolometric luminosity and hydrogen content. We detect four early OB type stars close to WR 102c. These stars have radial velocities similar to that of WR 102c. We suggest that together with WR 102c these stars belong to a distinct star cluster with a total mass of about 1000 M_sun. We identify a new WR nebula around WR 102c in the SINFONI map of the diffuse Br$\gamma$ emission and in the HST's Pa$\alpha$ images. The Br$\gamma$ line at different locations is not significantly broadened and similar to the width of nebular emission elsewhere in the H II region around WR 102c. The massive star WR 102c located in the Galactic Center region resides in a star cluster containing further early type stars. The stellar parameters of WR 102c are typical for hydrogen-free WN6 stars. We newly identify a nebula surrounding WR 102c that has a morphology similar to other nebulae around hydrogen-free WR stars, and propose that the formation of this nebula is linked to interaction of the fast stellar wind with the matter ejected at previous evolutionary stage of WR 102c.
银河系中质量最大的恒星之一可能是孤立形成的
DOI: 10.1093/mnras/stt1817
发表时间: 2013
影响因子: 4.8
作者:
L. M. Oskinova;M. Steinke;W.-R. Hamann;A. Sander;H. Todt;A. Liermann
通讯作者: A. Liermann
银河系 WC 恒星光谱分析的恒星参数表明了新的演化序列
DOI: 10.1051/0004-6361/201117830
发表时间: 2012
期刊: arXiv: Solar and Stellar Astrophysics
影响因子: --
作者:
A. Sander;W.-R. Hamann;H. Todt
通讯作者: H. Todt
斯皮策在大麦哲伦星云中发现了一颗新的沃尔夫-拉叶星和一个候选星团
DOI: 10.1093/mnras/stu909
发表时间: 2014
影响因子: 4.8
作者:
V. V. Gvaramadze;A.-N. Chené;A. Y. Kniazev;O. Schnurr;T. Shenar;A. Sander;R. Hainich;N. Langer;W.-R. Hamann;Y.-H. Chu;R. A. Gruendl
通讯作者: R. A. Gruendl
五联体星团的轨道运动 拱门和五联体星团的共同起源?
DOI: 10.1088/0004-637x/789/2/115
发表时间: 2014
期刊: The Astrophysical Journal
影响因子: --
作者:
Stolte;Hußmann;Morris;Brandner;Clarkson;Habibi;Matthews
通讯作者: Matthews
DOI: 10.1051/0004-6361/201323030
发表时间: 2014
期刊: arXiv: Solar and Stellar Astrophysics
影响因子: --
作者:
Habibi;Stolte;Harfst
通讯作者: Harfst