A Wide Field Survey of Satellite Galaxies around the Spiral Galaxy M106
A Wide Field Survey of Satellite Galaxies around the Spiral Galaxy M106
复制标题
DOI：
10.1111/j.1365-2966.2010.18022.x
复制
发表时间：
2010-11
影响因子：
4.8
通讯作者：
Eunhyeuk Kim;Minsun Kim;N. Hwang;M. Lee;M. Chun;H. Ann
中科院分区：
文献类型：
--
作者：
Eunhyeuk Kim;Minsun Kim;N. Hwang;M. Lee;M. Chun;H. Ann
我们使用加拿大-法国-夏威夷望远镜/MegaCam对M106(NGC4258)中的卫星星系进行了广泛的野外观测，覆盖了M106周围1：7�×2�的视场。我们发现了16个候选M106卫星星系。这些星系中有8个被发现是矮小星系，它们比其余的星系小得多，也暗得多。其中四个星系是新发现的。16个卫星星系中有15个的表面亮度轮廓可以用不同尺度长度的指数盘轮廓来很好地表示。我们得到了这些卫星星系的表面数密度分布。中心数密度分布(d<；100kpc)符合幂指数，幂指数为2：1±0：5，与等温分布的预期幂指数相似。这些卫星的光度函数可以很好地用谢克特函数表示，其弱端斜率为1：19+0.03−0.06。这些卫星星系的综合光度学性质(总光度、总色和盘尺度长度)和空间分布被发现与银河系和M31大致相似。
We present a wide field survey of satellite galaxies in M106 (NGC 4258) covering a 1:7 � × 2 � field around M106 using Canada-France-Hawaii Telescope/MegaCam. We find 16 satellite galaxy candidates of M106. Eight of these galaxies are found to be dwarf galaxies that are much smaller and fainter than the remaining galaxies. Four of these galaxies are new findings. Surface brightness profiles of 15 out of 16 satellite galaxies can be represented well by an exponential disk profile with varying scale length. We derive the surface number density distribution of these satellite galaxies. The central number density profile (d < 100 kpc) is well fitted by a power-law with a power index of 2:1±0:5, similar to the expected power index of isothermal distribution. The luminosity function of these satellites is represented well by the Schechter function with a faint end slope of 1:19 +0.03 −0.06 . Integrated photometric properties (total luminosity, total colour, and disk scale length) and the spatial distribution of these satellite galaxies are found to be roughly similar to those of the Milky Way and M31.