The GALEX VIMOS-VLT Deep Survey Measurement of the Evolution of the 1500 Å Luminosity Function
The GALEX VIMOS-VLT Deep Survey Measurement of the Evolution of the 1500 Å Luminosity Function
复制标题
GALEX VIMOS-VLT 1500 Å 光度函数演化的深度测量
DOI：
10.1086/426733
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Zanichelli
中科院分区：
文献类型：
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作者：
S. Arnouts;D. Schiminovich;O. Ilbert;L. Tresse;B. Milliard;M. Treyer;S. Bardelli;T. Budavári;T. Wyder;E. Zucca;O. Le Fèvre;D. C. Martin;G. Vettolani;C. Adami;M. Arnaboldi;T. Barlow;L. Bianchi;M. Bolzonella;D. Bottini;Y. Byun;A. Cappi;S. Charlot;T. Contini;J. Donas;K. Forster;S. Foucaud;P. Franzetti;P. Friedman;B. Garilli;I. Gavignaud;L. Guzzo;T. Heckman;C. Hoopes;A. Iovino;P. Jelinsky;V. Le Brun;Y.;D. Maccagni;B. Madore;R. Malina;B. Marano;C. Marinoni;H. McCracken;A. Mazure;B. Meneux;R. Merighi;P. Morrissey;S. Neff;S. Paltani;R. Pelló;J. Picat;A. Pollo;L. Pozzetti;M. Radovich;R. Rich;R. Scaramella;M. Scodeggio;M. Seibert;O. Siegmund;T. Small;A. Szalay;B. Welsh;C. Xu;G. Zamorani;A. Zanichelli
基于星系演化探测器VIMOS-VLT的深度探测观测(~1,000≤≤24.5星系的光谱红移)和使用现有的数据集，我们首次测量了星系光度函数(Lf)，测量范围为0.2NUVVV1.2范围内的1500ä。主要结果如下：(1)在z=0和z=1之间观测到了ΔM~*~-2.0mag的光度演化，在z=1和z=3之间观测到了ΔM~*~-1.0mag的光度演化，这证实了过去恒星形成活动明显较高。(2)低频斜率在-1.2≥α≥-1.65的范围内变化，在较高z时略有增加的迹象。(3)我们将样本分成三个静止帧(B-I)间隔，提供了一个近似的光谱类型分类：SB-SD、SD-IRR和未遮挡的星暴。我们发现，最蓝的一类在光度上的演化没有其他两类强烈。另一方面，它们的数密度随着z的增加而急剧增加(在局域宇宙中约为15%，在z1处为约55%)，而最红类的数密度则减少。
We present the first measurement of the galaxy luminosity function (LF) at 1500 Å in the range 0.2 ≤ z ≤ 1.2 based on Galaxy Evolution Explorer VIMOS-VLT Deep Survey observations (~1000 spectroscopic redshifts for galaxies with NUV ≤ 24.5) and at higher z using existing data sets. Our main results are summarized as follows: (1) Luminosity evolution is observed with ΔM* ~ -2.0 mag between z = 0 and z = 1 and ΔM* ~ -1.0 mag between z = 1 and z = 3. This confirms that the star formation activity was significantly higher in the past. (2) The LF slopes vary in the range -1.2 ≥ α ≥ -1.65, with a marginally significant hint of increase at higher z. (3) We split the sample in three rest-frame (B - I) intervals, providing an approximate spectral type classification: Sb-Sd, Sd-Irr, and unobscured starbursts. We find that the bluest class evolves less strongly in luminosity than the two other classes. On the other hand, their number density increases sharply with z (~15% in the local universe to ~55% at z ~ 1), while that of the reddest classes decreases.