论文标题
简单恒星种群的全光谱拟合精确。 ii。在波长范围内对星团质量质量的依赖性0.3-5.0 $ $ m m
On the precision of full-spectrum fitting of simple stellar populations. II. The dependence on star cluster mass in the wavelength range 0.3-5.0 $μ$m
论文作者
论文摘要
在第二篇论文中，关于通过完整的光谱拟合技术确定年龄和金属性（SSP）的准确性和精度的第二篇论文，我们研究了星际群质量通过随机质量数量的恒星数量的影响，这些星星数量在恒星质量功能的顶部附近，在某些波动中占主导地位，这在某些稳定性的范围内占据了一定的范围，从而占主导地位，这些恒星在某些波动的状态下却依赖于时代的依赖于时代的依赖。我们考虑基于Padova等线的SSP型号，涵盖年龄范围7.0 $ \ leq $ log（年龄/年）$ \ leq $ 10.1。 Simulated spectra of star clusters in the mass range $10^4 \leq M/M_{\odot} < 10^6$ are compared with SSP model spectra to determine best-fit ages and metallicities using a full-spectrum fitting routine in four wavelength regimes: the blue optical (0.35-0.70 $μ$m), the red optical (0.6-1.0 $μ$m), the近IR（1.0-2.5 $μ$ m）和MID-IR（2.5-5.0 $μ$ m）。我们根据年龄和金属性确定的整体精度及其对簇质量的依赖性，比较每个波长状态的功能。我们还通过利用两个不同的光谱文库（巴塞尔和BT-SETTL）来研究光谱分辨率的相关性。我们在识别外部星系中尘土飞扬的恒星形成区域中的年轻大型群集方面强调了中红外政权的力量。在线提供了模拟星团和SSP的光谱，以实现社区的后续研究。
In this second paper of a series on the accuracy and precision of the determination of age and metallicity of simple stellar populations (SSPs) by means of the full spectrum fitting technique, we study the influence of star cluster mass through stochastic fluctuations of the number of stars near the top of the stellar mass function, which dominate the flux in certain wavelength regimes depending on the age. We consider SSP models based on the Padova isochrones, spanning the age range 7.0 $\leq$ log (age/yr) $\leq$ 10.1. Simulated spectra of star clusters in the mass range $10^4 \leq M/M_{\odot} < 10^6$ are compared with SSP model spectra to determine best-fit ages and metallicities using a full-spectrum fitting routine in four wavelength regimes: the blue optical (0.35-0.70 $μ$m), the red optical (0.6-1.0 $μ$m), the near-IR (1.0-2.5 $μ$m), and the mid-IR (2.5-5.0 $μ$m). We compare the power of each wavelength regime in terms of both the overall precision of age and metallicity determination, and of its dependence on cluster mass. We also study the relevance of spectral resolution in this context by utilizing two different spectral libraries (BaSeL and BT-Settl). We highlight the power of the mid-IR regime in terms of identifying young massive clusters in dusty star forming regions in external galaxies. The spectra of the simulated star clusters and SSPs are made available online to enable follow-up studies by the community.
