A Comparative Study of Photometry on Bright Stars and Dark Stars

WANG  Ting-Ting; SU  Cheng-Yue; WANG  Xian; ZHOU  Zhen; ZHOU  Dong-Yue

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A Comparative Study of Photometry on Bright Stars and Dark Stars

更新时间：2026-05-27

- A Comparative Study of Photometry on Bright Stars and Dark Stars
- Vol. 28, Issue 2, Pages: 59-62(2011)
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- Published：2011
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王婷婷, 苏成悦, 王娴, 周镇, 周冬跃. 亮星与暗星测光方法的对比研究[J]. 广东工业大学学报, 2011, 28(2): 59-62.

WANG Ting-Ting, SU Cheng-Yue, WANG Xian, et al. A Comparative Study of Photometry on Bright Stars and Dark Stars[J]. 2011, 28(2): 59-62.
王婷婷, 苏成悦, 王娴, 周镇, 周冬跃. 亮星与暗星测光方法的对比研究[J]. 广东工业大学学报, 2011, 28(2): 59-62. DOI：

WANG Ting-Ting, SU Cheng-Yue, WANG Xian, et al. A Comparative Study of Photometry on Bright Stars and Dark Stars[J]. 2011, 28(2): 59-62. DOI：

摘要

利用有效点扩散函数和高斯函数分别对亮星和暗星进行拟合测光的对比研究.将国家天文台1 m望远镜观测的16幅CCD图像中的星体按其平均光度分为亮星和暗星二类，各自求得它们的有效点扩散函数并进行测量.结果表明：用亮星的有效点扩散函数拟合亮星精度较高，用高斯拟合方法拟合暗星精度较高.有效点扩散函数测量亮星的精度优势明显，对于暗星测量以高斯拟合方法稍好，说明暗星的形态结构更接近高斯分布．

Abstract

It conducts a comparative study of photometry on the bright stars and dark stars

using e-PSF(effective-Point-Spread-Function) and Gaussian function. The stars in the 16 CCD images observed by National Astronomical 1 m telescope were divided into two types of stars

bright stars and dark stars according to the average luminosity

and each of the e-PSF was calculated and used to measure the stars. The results reveal that the precision rate is higher if the e-PSF of bright stars is used to measure bright stars

and the precision rate is higher if the Gauss-fitting is used to measure dark stars. The e-PSF has obvious advantages to measure the precision of bright stars while the Gauss-fitting is better for dark stars

which shows that the morphological structure of the dark star is closer to Gaussian distribution.

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references

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张志渊,彭青玉. ePSF拟合法与Gaussian拟合法的比较[J]. 天文研究与技术,2010,7(2):132-139.

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