Cosmological parameters from combined second- and third-order aperture mass statistics of cosmic shear

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Cosmological parameters from combined second - and third - order aperture mass statistics of cosmic shear

We present predictions for cosmological parameter constraints from combined measurements of secondand thirdorder statistics of cosmic shear. We define the generalized third-order aperture mass statistics 〈M3 ap〉 and show that it contains much more information about the bispectrum of the projected matter density than the skewness of the aperture mass. From theoretical models as well as from ΛCDM...

متن کامل

Cosmological Parameters from Cosmic Shear

For a thorough introduction to cosmic shear, see the review of Réfrégier [1] in this volume. Since its first detection in 2000, cosmic shear has proven to be a valuable tool for cosmology. Constraints on cosmological parameters, in particular the (dark+luminous) matter density Ωm and the power spectrum normalization σ8 has been obtained from cosmic shear surveys with observed areas of up to sev...

متن کامل

asymptotic property of order statistics and sample quntile

چکیده: فرض کنید که تابعی از اپسیلون یک مجموع نامتناهی از احتمالات موزون مربوط به مجموع های جزئی براساس یک دنباله از متغیرهای تصادفی مستقل و همتوزیع باشد، و همچنین فرض کنید توابعی مانند g و h وجود دارند که هرگاه امید ریاضی توان دوم x متناهی و امیدریاضی x صفر باشد، در این صورت می توان حد حاصلضرب این توابع را بصورت تابعی از امید ریاضی توان دوم x نوشت. حالت عکس نیز برقرار است. همچنین ما با استفاده...

15 صفحه اول

Cosmological parameters and cosmic topology

Geometry constrains but does not dictate the topology of the three-dimensional space. In a locally spatially homogeneous and isotropic universe, however, the topology of its spatial section dictates its geometry. We show that, besides determining the geometry, the knowledge of the spatial topology through the circles-in-the-sky offers an effective way of setting constraints on the density param...

متن کامل

The three-point correlation function of cosmic shear. II: Relation to the bispectrum of the projected mass density and generalized third-order aperture measures

Abstract. Cosmic shear, the distortion of images of high-redshift sources by the intervening inhomogeneous matter distribution in the Universe, has become one of the essential tools for observational cosmology, since it was first measured in 2000. Since then, several surveys have been conducted and analyzed in terms of second-order shear statistics. Current surveys are on the verge of providing...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Astronomy & Astrophysics

سال: 2005

ISSN: 0004-6361,1432-0746

DOI: 10.1051/0004-6361:20053531