Fornax 3D project: Automated detection of planetary nebulae in the centres of early-type galaxies and first results
Fornax 3D project: Automated detection of planetary nebulae in the centres of early-type galaxies and first results
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Fornax 3D 项目：自动探测早期型星系中心的行星状星云和初步结果
DOI：
10.1051/0004-6361/201936862
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发表时间：
2020
影响因子：
6.5
通讯作者：
L. Zhu
中科院分区：
文献类型：
--
作者：
Thomas William Spriggs;M. Sarzi;R. Napiwotzki;P. M. G. Anta;S. Viaene;B. Nedelchev;L. Coccato;E. Corsini;P. Zeeuw;J. Falcón;D. Gadotti;E. Iodice;M. Lyubenova;I. Martín;R. McDermid;F. Pinna;G. Ven;L. Zhu
河外行星状星云（PNe）可以通过相对较强的星云[O III]发射来探测，并作为对当地恒星种群的直接探测。由于PNe具有明显的普遍不变的星等截止值，因此也被认为是距离估计的一个重要标准烛光。通过检测星系内的PNe，我们的目标是连接PNe的相对丰度的主机星系恒星人口的属性。通过去除FCC 167和FCC 219的恒星背景成分，我们的目标是产生这些星系的PN光度函数（PNLF），从而也估计到这两个系统的距离模量。最后，我们测试了我们的新的检测和分析方法的可靠性和鲁棒性。它检测未解决的点源的[O III] 5007在以前未探索的区域内的排放。我们在空间和光谱维度上一起模拟[O III]排放，正如多单元光谱探测器提供给我们的那样，我们利用作为Fornax3D调查的一部分收集的数据。对于每一个源，我们检查的星云发射线的属性，以消除其他来源，可能会阻碍PNLF的安全建设，如超新星遗迹和H II地区。作为进一步的步骤，我们排除了任何潜在的限制，并通过一组模拟得出关于我们建模方法可靠性的结论。通过应用这种新的检测和建模方法，积分场单位观测，我们报告的距离估计和光度特定的PNE频率值的两个星系。此外，我们还概述了源污染，星系的差异，以及可能对密集恒星环境中的PNe人口的影响。
Extragalactic planetary nebulae (PNe) are detectable through relatively strong nebulous [O III] emission and act as direct probes into the local stellar population. Because they have an apparently universal invariant magnitude cut-off, PNe are also considered to be a remarkable standard candle for distance estimation. Through detecting PNe within the galaxies, we aim to connect the relative abundances of PNe to the properties of their host galaxy stellar population. By removing the stellar background components from FCC 167 and FCC 219, we aim to produce PN luminosity functions (PNLF) of these galaxies, and thereby also estimate the distance modulus to these two systems. Finally, we test the reliability and robustness of our novel detection and analysis method. It detects unresolved point sources by their [O III] 5007 Å emission within regions that have previously been unexplored. We model the [O III] emissions in the spatial and spectral dimensions together, as afforded to us by the Multi Unit Spectroscopic Explorer, and we draw on data gathered as part of the Fornax3D survey. For each source, we inspect the properties of the nebular emission lines to remove other sources that might hinder the safe construction of the PNLF, such as supernova remnants and H II regions. As a further step, we characterise any potential limitations and draw conclusions about the reliability of our modelling approach through a set of simulations. By applying this novel detection and modelling approach to integral field unit observations, we report for the distance estimates and luminosity-specific PNe frequency values for the two galaxies. Furthermore, we include an overview of source contamination, galaxy differences, and possible effects on the PNe populations in the dense stellar environments.
影响因子：
4.9
作者：
Bundy, Kevin;Bershady, Matthew A.;Zhang, Kai
通讯作者：
Zhang, Kai