SPICA and the Chemical Evolution of Galaxies: The Rise of Metals and Dust
SPICA and the Chemical Evolution of Galaxies: The Rise of Metals and Dust
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DOI：
10.1017/pasa.2017.43
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发表时间：
2017-10
影响因子：
6.3
通讯作者：
J. Fernández-Ontiveros;L. Armus;M. Baes;J. Bernard-Salas;A. Bolatto;J. Braine;L. Ciesla;I. D. Looze;E. Egami;J. Fischer;M. Giard;E. González-Alfonso;G. Granato;C. Gruppioni;Masatoshi Imanishi;D. Ishihara;H. Kaneda;S. Madden;M. Malkan;H. Matsuhara;M. Matsuura;T. Nagao;F. Najarro;T. Nakagawa;T. Onaka;S. Oyabu;M. Pereira-Santaella;I. Fournón;I. Fournón;P. Roelfsema;P. Santini;L. Silva;John-David T. Smith;L. Spinoglio;F. V. D. Tak;T. Wada;R. Wu
中科院分区：
文献类型：
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作者：
J. Fernández-Ontiveros;L. Armus;M. Baes;J. Bernard-Salas;A. Bolatto;J. Braine;L. Ciesla;I. D. Looze;E. Egami;J. Fischer;M. Giard;E. González-Alfonso;G. Granato;C. Gruppioni;Masatoshi Imanishi;D. Ishihara;H. Kaneda;S. Madden;M. Malkan;H. Matsuhara;M. Matsuura;T. Nagao;F. Najarro;T. Nakagawa;T. Onaka;S. Oyabu;M. Pereira-Santaella;I. Fournón;I. Fournón;P. Roelfsema;P. Santini;L. Silva;John-David T. Smith;L. Spinoglio;F. V. D. Tak;T. Wada;R. Wu
摘要如果不直接探测恒星形成星系和活动星系核的尘埃遮挡相，就不可能理解在过去11年中驱动星系化学演化的物理过程。这一阶段隐藏在光学追踪器中，代表了1<；z<；3星系中恒星形成和黑洞吸积活动的大部分。利用像Spica这样的低温红外天文台进行的光谱观测，将足够灵敏，可以透过星系尘埃模糊的区域，获得其余图像中高z星系的中红外到远红外范围。这个波长范围包含一套独特的光谱线和尘埃特征，作为重元素丰度和尘埃成分的替代物，为示踪剂提供了对消光和温度的微弱响应。在这项工作中，我们研究了如何利用Spica观测来了解星系化学演化中的关键方面：基于重元素丰度空间分布的邻近星系的组装，达到光度函数拐点的星系中直到z~3的整体金属含量，以及高z星系的尘埃组成。还讨论了与2020年代末可用的设施可能产生的协同作用。
Abstract The physical processes driving the chemical evolution of galaxies in the last ~ 11Gyr cannot be understood without directly probing the dust-obscured phase of star-forming galaxies and active galactic nuclei. This phase, hidden to optical tracers, represents the bulk of the star formation and black hole accretion activity in galaxies at 1 < z < 3. Spectroscopic observations with a cryogenic infrared observatory like SPICA, will be sensitive enough to peer through the dust-obscured regions of galaxies and access the rest-frame mid- to far-infrared range in galaxies at high-z. This wavelength range contains a unique suite of spectral lines and dust features that serve as proxies for the abundances of heavy elements and the dust composition, providing tracers with a feeble response to both extinction and temperature. In this work, we investigate how SPICA observations could be exploited to understand key aspects in the chemical evolution of galaxies: the assembly of nearby galaxies based on the spatial distribution of heavy element abundances, the global content of metals in galaxies reaching the knee of the luminosity function up to z ~ 3, and the dust composition of galaxies at high-z. Possible synergies with facilities available in the late 2020s are also discussed.