intEgraL fieLd unIt daTacubEs(卫星)的光谱分析工具:NGC 7009和NGC 6778与MUSE的案例研究
Spectroscopic Analysis Tool for intEgraL fieLd unIt daTacubEs (satellite): Case studies of NGC 7009 and NGC 6778 with MUSE
S. Akras, H. Monteiro, J. R. Walsh, J. García-Rojas, I. Aleman, H. Boffin, P. Boumis, A. Chiotellis, R. M. L. Corradi, D. R. Gonçalves, L. A. Gutiérrez-Soto, D.… 展开作者
S. Akras, H. Monteiro, J. R. Walsh, J. García-Rojas, I. Aleman, H. Boffin, P. Boumis, A. Chiotellis, R. M. L. Corradi, D. R. Gonçalves, L. A. Gutiérrez-Soto, D. Jones, C. Morisset, X. Papanikolaou
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20 pages, 20 figures, 7 tables, Accepted for publication in MNRAS
Integral field spectroscopy (IFS) provides a unique capability to spectroscopically study extended sources over a 2D field of view, but it also requires new techniques and tools. In this paper, we present an automatic code, Spectroscopic Analysis Tool for intEgraL fieLd unIt daTacubEs, SATELLITE, designed to fully explore such capability in the characterization of extended objects, such as planetary nebulae, H II regions, galaxies, etc. SATELLITE carries out 1D and 2D spectroscopic analysis through a number of pseudo-slits that simulate slit spectrometry, as well as emission line imaging. The 1D analysis permits direct comparison of the integral field unit (IFU) data with previous studies based on long-slit spectroscopy, while the 2D analysis allows the exploration of physical properties in both spatial directions. Interstellar extinction, electron temperatures and densities, ionic abundances from collisionally excited lines, total elemental abundances and ionization correction factors are computed employing the Pyneb package. A Monte Carlo approach is implemented in the code to compute the uncertainties for all the physical parameters. SATELLITE provides a powerful tool to extract physical information from IFS observations in an automatic and user configurable way. The capabilities and performance of SATELLITE are demonstrated by means of a comparison between the results obtained from the Multi Unit Spectroscopic Explorer (MUSE) data of the planetary nebula NGC 7009 with the results obtained from long-slit and IFU data available in the literature. The SATELLITE characterization of NGC 6778 based on MUSE data is also presented.
Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics
我们提出了自适应光学(AO)辅助的小麦哲伦云中的中间年龄星团NGC 419的积分场光谱。通过研究主序星(MSTO)的星团动力学和旋转特性,我们证明了AO馈MUSE观测这类天体的能力。基于1049个径向速度测量结果,我们确定了星团的动态质量为1.4+/-0.2x10^5 M_sun,动态质光比为0.67+/-0.08,略高于Kroupa初始质量函数的简单恒星星族预测。在扩展的MSTO两侧的光谱的堆叠分析显示显着的旋转增宽。我们的分析进一步提供了初步证据,证明红色MSTO恒星的旋转速度比蓝色恒星快。我们发现蓝色和红色MSTO恒星的平均V sin i值分别为87+/-16 km/s和130+/-22 km/s。由于MUSE的低光谱分辨率,潜在的系统效应可达30 km/s,但种群之间的V sin i差异不太可能受到影响。
MUSE crowded field 3D spectroscopy of over 12,000 stars in the globular cluster NGC 6397 - II. Probing the internal dynamics and the presence of a central black hole
摘要:NGC3132整个范围的2D光谱MUSE数据已经减少和分析。尘埃消光,电子密度和电离气体和丰度的温度进行了测定。星云呈现出复杂的变红结构,在边缘处具有高值(c(Hb)~0.4)。密度图与中等高密度(~1000 cm ^-3)的内部高电离等离子体相一致,而低电离等离子体呈现出一种密度峰值在边缘处的结构,其值约为700 cm ^-3。使用不同诊断的中值Te根据顺序[NII]、[SII]->[SIII]->[OI]-> HeI-> PJ降低。同样的,复合线所覆盖的Te的范围也比从CELs中获得的大得多,在星云内有很大的空间变化。如果这些差异是由于高密度团块的存在,这些空间变化表明星云内团块的性质和/或分布发生了变化。我们确定了平均He/H = 0.124。轻元素离子丰度的测量范围与文献值一致。我们的运动学分析很好地说明了许多发射线的二维运动学信息的力量,揭示了星云的内在结构。我们导出的速度图支持星云的几何形状类似于先前提出的空竹模型,但其主轴指向P.A.~- 22^o。我们确定了两个低表面亮度的弧形结构,朝向星云的北部和南部,具有高消光,高氦丰度和强低电离发射线。它们在空间上与一些扩展的低表面亮度中红外发射相一致。这些特征的特征与双星系统造成的旋进喷流的结果是一致的。这项研究说明了巨大的潜力,IFS的研究银河系PNE。
MUSE crowded field 3D spectroscopy of over 12,000 stars in the globular cluster NGC 6397 - I. The first comprehensive spectroscopic HRD of a globular cluster
The Pillars of Creation revisited with MUSE: gas kinematics and high-mass stellar feedback traced by optical spectroscopy
提供了M16中标志性创造之柱的积分场单元(IFU)数据。在几乎整个可见光波长范围内详细研究了柱的电离结构,并显示了相关物理参数的地图,例如消光、电子密度、电子温度、电离和中性气体的视线速度。与先前的作者一致,我们发现柱尖被附近星系团NGC 6611的大质量成员电离和光蒸发。它们显示分层电离结构,其中发射线根据其电离能量以降序达到峰值。IFU数据使我们能够分析分层电离结构方面的光蒸发流的运动学,并且我们发现,与模拟一致,光蒸发流通过位置-速度曲线中的蓝移来追踪。气体运动学和电离结构使我们能够绘制出柱的3D几何草图,将柱相对于电离星团恒星定位。我们使用一种新的方法来检测一个以前未知的双极流出的中间支柱的尖端,并建议它有一个嵌入式的原恒星作为其驱动源。此外,我们在最左边的支柱中识别出候选流出。与导出的物理参数和离子丰度,我们估计由于光蒸发流的质量损失率为70 M $_{\odot}$百万年$^{-1}$产生的预期寿命约为3百万年。