The Environmental Dependence of the Infrared Luminosity and Stellar Mass Functions
The Environmental Dependence of the Infrared Luminosity and Stellar Mass Functions
复制标题
红外光度和恒星质量函数的环境依赖性
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
D. Zaritsky
中科院分区：
文献类型：
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作者：
M. Balogh;D. Christlein;A. Zabludoff;D. Zaritsky
我们用两微米全天巡天的测光方法和拉斯坎帕纳斯红移巡天的红移观测研究了星系红外光度函数及其相关的恒星质量函数对环境和光谱类型的依赖关系。在野外环境中，有发射线的星系的红外光度函数比没有发射线的星系的红外光度函数有更陡峭的暗端斜率(αJ=-1.39)，而没有发射线的星系的红外光度函数的红移是红移的(αJ=-0.59)。然而，在星系团环境中，即使是非发射线星系也有陡峭的暗端Lf(αJ=-1.22)。总体群和现场LFS之间也有显著差异(95%)，ΔαJ=-0.34，ΔM*J=-0.54。所有这些变化在SMFS中表现得更为明显，我们通过将光谱中4000ä爆发的强度与恒星的质量光比联系起来进行计算。
We investigate the dependence of the galaxy infrared luminosity function (LF) and the associated stellar mass function (SMF) on environment and spectral type using photometry from the Two Micron All Sky Survey and redshifts from the Las Campanas Redshift Survey for galaxies brighter than MJ < -19 + 5 log h. In the field environment, the LFs of galaxies with emission lines have much steeper faint-end slopes (αJ = -1.39) than those of galaxies without emission lines (αJ = -0.59). In the cluster environment, however, even the non-emission-line galaxies have a steep faint-end LF (αJ = -1.22). There is also a significant (95%) difference between the overall cluster and field LFs, ΔαJ = -0.34 and ΔM*J = -0.54. All these variations are more pronounced in the SMFs, which we compute by relating the strength of the 4000 Å break in the optical spectra to a stellar mass-to-light ratio.