The galaxy luminosity function in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
The galaxy luminosity function in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
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DOI：
10.1088/1674-4527/19/8/113
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发表时间：
2019-03
影响因子：
1.8
通讯作者：
P. Zhao;Hong Wu;C. Kevin Xu;Ming Yang;Fan Yang;Yinan Zhu;Man I Lam;Junjie Jin;Hailong Yuan;Haotong Zhang;S. Shen;Jian-rong Shi;A. Luo;Xue-bing Wu;Yongheng Zhao;Y. Jing
中科院分区：
文献类型：
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作者：
P. Zhao;Hong Wu;C. Kevin Xu;Ming Yang;Fan Yang;Yinan Zhu;Man I Lam;Junjie Jin;Hailong Yuan;Haotong Zhang;S. Shen;Jian-rong Shi;A. Luo;Xue-bing Wu;Yongheng Zhao;Y. Jing
我们给出了星系在0.1g, 0.1r， 0.1i波段的光学光度函数（LFs），使用LAMOST指向区完全光谱调查（LaCoSSPAr）在南银河帽的~ 40°2天空区域的数据计算。主要用LAMOST获得了比r = 18.1亮的星系的红移。在每个波段，使用参数和非参数极大似然方法得到的LFs都很好地吻合。在0.1r波段，Schechter函数的拟合参数为φ * =（1.65±0.36）× 10−2 h 3 Mpc−3,M * = - 20.69±0.06 mag, α = - 1.12±0.08，与前人的研究结果一致。对发射线星系和吸收线星系也分别导出了LFs。吸收线星系的LFs在0.1r** ~ 18.5处有一个倾角，可以用双高斯函数很好地拟合，表明被动星系的LFs是双峰的。
We present optical luminosity functions (LFs) of galaxies in the 0.1g, 0.1r, 0.1i bands, calculated using data in ∼ 40 deg 2 sky area of the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap. Redshifts for galaxies brighter than r = 18.1 were obtained mainly with LAMOST. In each band, LFs derived using both parametric and non-parametric maximum likelihood methods agree well with each other. In the 0.1r band, our fitting parameters of the Schechter function are ϕ * = ( 1.65 ± 0.36 ) × 10 − 2 h 3 Mpc − 3 , M * = − 20.69 ± 0.06 mag and α = − 1.12 ± 0.08 , which agree with previous studies. Separate LFs are also derived for emission line galaxies and absorption line galaxies. The LFs of absorption line galaxies show a dip at 0.1r** ∼ 18.5 and can be fitted well by a double-Gaussian function, suggesting a bimodality in passive galaxies.