The nature of the faint galaxies in the Hubble Deep Field
The nature of the faint galaxies in the Hubble Deep Field
复制标题
哈勃深场中微弱星系的性质
DOI：
10.1093/mnras/282.1.l7
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发表时间：
1996
影响因子：
4.8
通讯作者：
N. Eaton
中科院分区：
文献类型：
--
作者：
B. Mobasher;M. Rowan‐Robinson;A. Georgakakis;N. Eaton
我们提出了在哈勃深空发现的星系的研究。很大比例的HDF星系正在经历一个强烈的星星形成时期，它们非常蓝色的颜色就是证明。发现了广泛的形态类型，具有高比例的奇特和合并形态。用E到HII型星系的红移SEDs拟合多带光谱，预测了HDF探测到的星系的光谱类型和红移。我们发现红移的中位数为1.6，其中68美元的$z > 1$和31美元的$z >2$。I-波段绝对星等分布作为星系类型的函数，显示出一个似乎合理的趋势，即光度向更晚的类型递减。当$z < 1$时，导出的I波段光度函数与加拿大-法国巡天（Lilly et al 1996）的结果一致;当$1 < z < 3$时，在$M_I <-21 $时，光度演化很强，与类星体和星暴星系的速率相当。我们已经预测红外和亚毫米波通量假设大多数星系正在经历一个强大的星爆。几个计划中的空间和地面深度调查能够探测到有趣的HDF星系数量。
We present a study of the galaxies found in the Hubble Deep Field. A high proportion of HDF galaxies are undergoing a strong episode of star formation, as evidenced by their very blue colours. A wide range of morphological types is found, with a high proportion of peculiar and merger morphologies. Fitting the multiband spectra with redshifted SEDs of galaxy types E to HII, we predict the spectral types and redshifts of galaxies detected in the HDF. We find a median redshift of 1.6, with $68\%$ having $z > 1$ and $31\%$ with $z >2$. The I-band absolute magnitude distributions as a function of galaxy types show a plausible trend of decreasing luminosity towards later types. The derived I-band luminosity function agrees well with that from the Canada-France survey (Lilly et al 1996) for $z < 1$ and shows strong luminosity evolution at $M_I < -21$ for $1 < z < 3$, comparable to the rate seen in quasars and starburst galaxies. We have predicted infrared and submillimetre fluxes assuming most of the galaxies are undergoing a strong starburst. Several planned space-borne and ground-based deep surveys are capable of detecting interesting numbers of HDF galaxies.