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arXiv 1005.0509astro-ph.CO
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场星形成星系的一个基本面

A fundamental plane for field star-forming galaxies

M. A. Lara-López, J. Cepa, A. Bongiovanni, A. M. Pérez García, A. Ederoclite, H. Castañeda, M. Fernández Lorenzo, M. Póvic, M. Sánchez-Portal

摘要:

恒星形成率(SFR)、金属丰度和恒星质量是恒星形成星系的重要参数,是其形成和演化的特征。他们被称为是相互关联的低和高红移的质量-金属丰度,质量-SFR,和金属丰度-SFR的关系。在这项工作中,我们证明了在由恒星形成星系的轴SFR [log(SFR)(M_sun yr^-1)],气体金属丰度[12+log(O/H)]和恒星质量[log(M_star/M_sun)]定义的3D空间中存在一个平面。我们使用了斯隆数字巡天-数据发布7(SDSS-DR 7)的“主要星系样本”中的恒星形成星系,其红移范围为0.04 < z < 0.1,r星等在14.5和17.77之间。金属丰度、SFR和恒星质量取自约翰霍普金斯大学马克斯-普朗克天体物理研究所(MPA-JHU)发射线分析数据库。从44214个星系的最后一个样本,我们发现第一次场星系的基本平面有关的SFR,气体金属丰度,恒星质量的恒星形成星系在当地的宇宙。这个平面的应用之一是从SFR和金属丰度估计恒星质量。来自文献的红移约为2.2和3.5的高红移数据没有显示出在这个基本平面上演化的证据。

英文摘要:

Star formation rate (SFR), metallicity and stellar mass are within the important parameters of star--forming galaxies that characterize their formation and evolution. They are known to be related to each other at low and high redshift in the mass--metallicity, mass--SFR, and metallicity--SFR relations. In this work we demonstrate the existence of a plane in the 3D space defined by the axes SFR [log(SFR)(M_sun yr^-1)], gas metallicity [12+log(O/H)], and stellar mass [log(M_star/M_sun)] of star-forming galaxies. We used star--forming galaxies from the "main galaxy sample" of the Sloan Digital Sky Survey--Data Release 7 (SDSS-DR7) in the redshift range 0.04 < z < 0.1 and r-magnitudes between 14.5 and 17.77. Metallicities, SFRs, and stellar masses were taken from the Max-Planck-Institute for Astrophysics-John Hopkins University (MPA-JHU) emission line analysis database. From a final sample of 44214 galaxies, we find for the first time a fundamental plane for field galaxies relating the SFR, gas metallicity, and stellar mass for star--forming galaxies in the local universe. One of the applications of this plane would be estimating stellar masses from SFR and metallicity. High redshift data from the literature at redshift ~2.2 and 3.5, do not show evidence for evolution in this fundamental plane.

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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