Weak lensing measurements of dark matter halos of galaxies from COMBO-17
Weak lensing measurements of dark matter halos of galaxies from COMBO-17
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DOI：
10.1051/0004-6361:20042606
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发表时间：
2004-12
影响因子：
6.5
通讯作者：
M. Kleinheinrich;P. Schneider;H. Rix;T. Erben;C. Wolf;M. Schirmer;K. Meisenheimer;A. Borch;S. Dye;Z. Kovács;L. Wisotzki
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文献类型：
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作者：
M. Kleinheinrich;P. Schneider;H. Rix;T. Erben;C. Wolf;M. Schirmer;K. Meisenheimer;A. Borch;S. Dye;Z. Kovács;L. Wisotzki
收到/接受摘要。我们提出了一个测量暗物质晕星系周围的COMBO- 17调查使用弱引力透镜的质量估计。COMBO-17对这类研究特别有用，因为它涵盖了17个滤光片的观测，从中可以得出R < 24的天体的精确光度红移和光谱分类。这使我们能够选择透镜和源星系从他们的红移，从而避免任何不确定性的估计源红移分布。我们通过将奇异等温球（SIS）或纳瓦罗-弗伦克-怀特（NFW）轮廓的归一化拟合到整个透镜样本来研究红移zd = 0.2 − 0.7的星系透镜;然后我们分别考虑蓝色和红色子样本周围的晕。我们还限制了光环质量与光的缩放。对于NFW模型，我们发现维里质量M � vir = 3.9
Received / Accepted Abstract. We present a measurement of mass estimates for dark matter halos around galaxies from the COMBO- 17 survey using weak gravitational lensing. COMBO-17 is particularly useful for this kind of investigation because it covers observations in 17 optical filters from which accurate photometric redshifts and spectral classification for objects with R < 24 are derived. This allows us to select lens and source galaxies from their redshifts and to thus avoid any uncertainties from estimates of the source redshift distribution. We study galaxy lenses at redshifts zd = 0.2 − 0.7 by fitting the normalization of either singular isothermal spheres (SIS) or Navarro- Frenk-White (NFW) profiles to the whole lens sample; we then consider halos around blue and red subsamples separately. We also constrain the scaling of halo mass with light. For the NFW model, we find virial masses M � vir = 3.9