A faint galaxy redshift survey to B=24
A faint galaxy redshift survey to B=24
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微弱星系红移调查至 B=24
DOI：
10.1093/mnras/273.1.157
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发表时间：
1995
影响因子：
4.8
通讯作者：
Nial R. Tanvir
中科院分区：
文献类型：
--
作者：
K. Glazebrook;R. S. Ellis;M. Colless;T. Broadhurst;J. Allington;Nial R. Tanvir
使用{\it威廉赫歇尔望远镜}上的多狭缝LDSS-2摄谱仪，我们已经完成了一个红移的调查范围为22.5 1$$，包括最高的红移星系（$z=1.108$）尚未在现场样本中发现。中位红移，$\zmed=0.46$，和形式的红移分布构成了令人信服的证据，反对简单的光度演化作为一个解释的大量过剩的微弱星系（$\simeq\times$2--4无演化）在这个星等范围内看到。相反，我们确定过剩人口为蓝色物体与$z\sim 0.4$和$B$\，光度类似于本地$L^*$星系表明，在过去的哈勃时间，这些对象的密度急剧下降，证实了在更明亮的红移调查中发现的趋势。我们还发现了一个显着的缺乏{\it非常}低红移星系（$z<0.1）在微弱的限制，严重限制任何显着的陡峭的本地场星系光度函数在低光度。
Using the multislit LDSS-2 spectrograph on the {\it William Herschel Telescope} we have completed a redshift survey in the magnitude range $22.5 1$ and includes the highest redshift galaxy ($z=1.108$) yet discovered in a field sample. The median redshift, $\zmed=0.46$, and form of the redshift distribution constitute compelling evidence against simple luminosity evolution as an explanation of the large excess of faint galaxies ($\simeq\times$2--4 no-evolution) seen in this magnitude range. Rather we identify the excess population as blue objects with $z\sim 0.4$ and $B$\, luminosities similar to local $L^*$ galaxies indicating a dramatic decrease in the density of such objects over the last Hubble time, confirming the trends found in brighter redshift surveys. We also find a marked absence of {\it very} low redshift galaxies ($z<$0.1) at faint limits, severely constraining any significant steepening of the local field galaxy luminosity function at low luminosities.