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arXiv 2203.01159astro-ph.GA
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MaNGA星系的化学演化历史

Chemical evolution history of MaNGA galaxies

Artemi Camps-Fariña, Sebastián F. Sánchez, Alfredo Mejía-Narváez, Eduardo A. D. Lacerda, Leticia Carigi, Gustavo Bruzual, Paola Alvarez-Hurtado, Niv Drory, Rich… 展开作者

Artemi Camps-Fariña, Sebastián F. Sánchez, Alfredo Mejía-Narváez, Eduardo A. D. Lacerda, Leticia Carigi, Gustavo Bruzual, Paola Alvarez-Hurtado, Niv Drory, Richard R. Lane, Nicholas Fraser Boardman, Guillermo A. Blanc

摘要:

我们使用光谱合成技术研究的结果显示其化学富集历史(ChEH)以及恒星质量-金属丰度关系(MZR)随宇宙时间的演变的完整的MANGA样本的研究。我们发现,更大质量的星系变得丰富的第一和较低质量的星系这样做后,产生的变化,在MZR变得更浅的时间。将样本分成形态和恒星形成状态箱,出现了一些特别有趣的结果:MZR的质量依赖性对于后来的形态类型变得不那么相关,在某种程度上,它反转了Sd/Irr星系,这表明形态至少是化学演化中质量一样重要的因素。完整样本的MZR显示在高质量端和低质量端的平坦化,但前者只出现在退休星系中,而后者只出现在恒星形成星系中。我们还发现,目前的平均金属丰度梯度是负的,但对于低质量星系,它是在过去的某个时候,在此之前,所有的星系有一个积极的梯度倒置。我们还比较了ChEH在不同的箱中的多样性,以及主要驱动多样性的因素:星系变得丰富的程度或它们这样做的速度。

英文摘要:

We show the results of a study using the spectral synthesis technique study for the full MaNGA sample showing their Chemical Enrichment History (ChEH) as well as the evolution of the stellar mass-metallicity relation (MZR) over cosmic time. We find that the more massive galaxies became enriched first and the lower mass galaxies did so later, producing a change in the MZR which becomes shallower in time. Separating the sample into morphology and star-forming status bins some particularly interesting results appear: The mass dependency of the MZR becomes less relevant for later morphological types, to the extent that it inverts for Sd/Irr galaxies, suggesting that morphology is at least as important a factor as mass in chemical evolution. The MZR for the full sample shows a flattening at the high-mass end and another at the low-mass range, but the former only appears for retired galaxies while the latter only appears for star-forming galaxies. We also find that the average metallicity gradient is currently negative for all mass bins but for low mass galaxies it was inverted at some point in the past, before which all galaxies had a positive gradient. We also compare how diverse the ChEHs are in the different bins considered as well as what primarily drives the diversity: How much galaxies become enriched or how quickly they do so.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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