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The chemical content of nearby galaxies: NGC 147

机译:附近星系的化学含量:NGC 147

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The dwarf spheroidal galaxy NGC 147 is one of the companions of the Andromeda galaxy. In this contribution we show the first spectroscopic results for the PN population of NGC 147, obtained from the GEMINI Multi-Object Spectrograph (GMOS) in December 2005. We present our results on the physical and chemical properties of the planetary nebulae At variance with the behaviour of the old stellar population of the galaxy, the metallicity of PNe is roughly constant through the galaxy Moreover, if the ± 0.06 dex of the [Fe/H] to [O/H] conversion is considered, there is no difference between the RGB and the PNe metallicities. We also show that the PNe in NGC 147 are 1 to 10 Gyr-old, Therefore, these results suggest that NGC 147 had no significant enrichment for a long period of time.
机译:矮小的球形银河系NGC 147是Andromeda Galaxy的伴侣之一。在这一贡献中,我们向2005年12月从Gemini Multi-Object Spectra乐乐仪(GMOS)获得的NGC 147的PN群体的第一个光谱结果显示了我们的结果对行星星云的异常和化学性质旧恒星的星系的行为,PNE的金属性通过星系大致恒定,如果±0.06 dex的[Fe / h]到[o / h]转换,则没有差异RGB和PNE金属。我们还表明,NGC 147中的PNE是1至10个机器人,因此,这些结果表明NGC 147在很长一段时间内没有显着的富集。

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