标题： 本地星系群附近的未分辨矮椭圆星系的新距离 显示英文标题

标题： New distances of unresolved dwarf elliptical galaxies in the vicinity of the Local Group

摘要： 我们基于使用2.56米北欧光学望远镜获得的深B波段和R波段CCD图像，给出了本地星系群中九个早期类型的矮星系以及S0星系NGC 4150的表面亮度涨落距离。通常，每个星系选择了六个位于不同星系中心距的恒星场，这些场被适当地选择以避免前景恒星和其他污染物，并通过傅里叶分析来确定距离，这些距离范围在3到16兆秒差距之间。 因此，SBF方法被证明可以有效地利用地面中口径望远镜测量距离，对于那些直到现在只能通过红巨星分支尖端方法结合哈勃太空望远镜才能测量距离的星系也是如此。 我们得到了以下距离模数：UGC 1703为28.11 ± 0.15 mag（或4.2 ± 0.3 Mpc），KDG 61为27.61 ± 0.17 mag（或3.3 ± 0.3 Mpc），UGCA 200为29.00 ± 0.27 mag（或6.3 ± 0.8 Mpc），UGC 5442为27.74 ± 0.18 mag（或3.5 ± 0.3 Mpc），UGC 5944为30.22 ± 0.17 mag（或11.1 ± 0.9 Mpc），NGC 4150为30.79 ± 0.11 mag（或14.4 ± 0.7 Mpc），BTS 128为31.02 ± 0.25 mag（或16.0 ± 1.9 Mpc），UGC 7639为29.27 ± 0.16 mag（或7.1 ± 0.6 Mpc），UGC 8799为30.19 ± 0.23 mag（或10.9 ± 1.2 Mpc），另一个距离为30.61 ± 0.26 mag（或13.2 ± 1.7 Mpc），UGC 8882为29.60 ± 0.20 mag（或8.3 ± 0.8 Mpc）。 显示英文摘要

摘要： We present Surface Brightness Fluctuation distances of nine early-type dwarf galaxies and the S0 galaxy NGC 4150 in the Local Volume based on deep B- and R-band CCD images obtained with the 2.56 metre Nordic Optical Telescope. Typically, six stellar fields at various galactocentric distances have been chosen for each galaxy as appropriately free of foreground stars and other contaminants, and Fourier analysed to determine the distances, which are found to lie in the range of 3 to 16 Mpc. The SBF method is thus demonstrated to efficiently measure distances from the ground with mid-aperture telescopes for galaxies for which only the tip of the red giant branch method in combination with the Hubble Space Telescope has been available until now. We obtained the following distance moduli: 28.11 +/- 0.15 mag (or 4.2 +/- 0.3 Mpc) for UGC 1703, 27.61 +/- 0.17 mag (or 3.3 +/- 0.3 Mpc) for KDG 61, 29.00 +/- 0.27 mag (or 6.3 +/- 0.8 Mpc) for UGCA 200, 27.74 +/- 0.18 mag (or 3.5 +/- 0.3 Mpc) for UGC 5442, 30.22 +/- 0.17 mag (or 11.1 +/- 0.9 Mpc) for UGC 5944, 30.79 +/- 0.11 mag (or 14.4 +/- 0.7 Mpc) for NGC 4150, 31.02 +/- 0.25 mag (or 16.0 +/- 1.9 Mpc) for BTS 128, 29.27 +/- 0.16 mag (or 7.1 +/- 0.6 Mpc) for UGC 7639, 30.19 +/- 0.23 mag (or 10.9 +/- 1.2 Mpc) for UGC 8799 with an alternative distance of 30.61 +/- 0.26 mag (or 13.2 +/- 1.7 Mpc), and 29.60 +/- 0.20 mag (or 8.3 +/- 0.8 Mpc) for UGC 8882.