LOW SURFACE BRIGHTNESS GALAXIES IN THE SDSS: THE LINK BETWEEN ENVIRONMENT, STAR-FORMING PROPERTIES, AND ACTIVE GALACTIC NUCLEI
LOW SURFACE BRIGHTNESS GALAXIES IN THE SDSS: THE LINK BETWEEN ENVIRONMENT, STAR-FORMING PROPERTIES, AND ACTIVE GALACTIC NUCLEI
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DOI：
10.1088/0004-637x/728/2/74
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发表时间：
2010-07
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影响因子：
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通讯作者：
G. Galaz;R. Herrera-Camus;D. Garcia-Lambas;N. Padilla
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作者：
G. Galaz;R. Herrera-Camus;D. Garcia-Lambas;N. Padilla
利用斯隆数字巡天（SDSS）数据发布4（DR 4），我们调查了低和高表面亮度星系（LSBG和HSBG，分别）的空间分布。特别是，我们把注意力集中在星系之间的相互作用对星星形成强度的影响在红移范围0.01 < z < 0.1。以柱面数和到第一和第五近邻的投影距离作为环境示踪剂，我们发现在小尺度（<2Mpc）下，LSBG往往比HSBG缺乏同伴。关于相互作用，我们有证据表明，强烈的星星形成活动的LSBG的比例增加时，星系对之间的距离（RP）小于约四倍的彼得罗相半径（r90）的一个组件。我们的研究结果表明，而不是他们的形成条件，隔离的LSBG是更多地与他们的生存和进化。相互作用对星星形成强度的影响，用出生率参数B的平均值来衡量，似乎对HSBG比对LSBG更强。我们的人口的LSBG和HSBG托管活动星系核（AGN）的分析表明，无论质量范围，部分LSBG的AGN是低于相应的部分HSBG的AGN。此外，我们还观察到，具有活动星系核的高、低超新星爆发体的比例随着球核光度的增加而增加。这些结果，以及那些关于恒星形成的性质的LSBG作为一个功能的环境，适合与一些作者提出的情况下，低于一个给定的阈值的表面质量密度，低表面亮度磁盘无法传播不稳定性，防止大质量黑洞的形成和演化的中心LSBG。
Using the Sloan Digital Sky Survey (SDSS) data release 4 (DR 4), we investigate the spatial distribution of low and high surface brightness galaxies (LSBGs and HSBGs, respectively). In particular, we focus our attention on the influence of interactions between galaxies on the star formation strength in the redshift range 0.01 < z < 0.1. With cylinder counts and projected distance to the first and fifth nearest neighbor as environment tracers, we find that LSBGs tend to have a lack of companions compared to HSBGs at small scales (<2Mpc). Regarding the interactions, we have evidence that the fraction of LSBGs with strong star formation activity increases when the distance between pairs of galaxies (rp) is smaller than about four times the Petrosian radius (r90) of one of the components. Our results suggest that, rather than being a condition for their formation, the isolation of LSBGs is more connected with their survival and evolution. The effect of the interaction on the star formation strength, measured by the average value of the birthrate parameter b, seems to be stronger for HSBGs than for LSBGs. The analysis of our population of LSBGs and HSBGs hosting an active galactic nucleus (AGN) show that, regardless of the mass range, the fraction of LSBGs having an AGN is lower than the corresponding fraction of HSBGs with an AGN. Also, we observe that the fraction of HSBGs and LSBGs having an AGN increases with the bulge luminosity. These results, and those concerning the star-forming properties of LSBGs as a function of the environment, fit with the scenario proposed by some authors where, below a given threshold of surface mass density, low surface brightness disks are unable to propagate instabilities, preventing the formation and evolution of massive black holes in the centers of LSBGs.