Deprojection technique for galaxy cluster considering the point spread function
نویسندگان
چکیده
منابع مشابه
SMAUG: A New Technique for the Deprojection of Galaxy Clusters
This paper presents SMAUG (Spectral Modeling And Unfolding of Galaxy clusters), a new parametric technique for reconstructing the spatial distributions of hydrogen, temperature and metal abundance of the X-ray emitting gas of galaxy clusters. The spatial profiles of these quantities are described with analytical functions depending on few parameters. Since these profiles affect the shape of the...
متن کاملAn improved deprojection and PSF-deconvolution technique for galaxy-cluster X-ray surface-brightness profiles
We have developed a regularisation procedure for the direct deprojection and PSF-deconvolution of X-ray surface brightness profiles of clusters of galaxies. This procedure allows us to obtain accurate density profiles in a straightforward manner from X-ray observations (in particular data from XMM-Newton, where the PSF correction is important), while retaining information about substructure in ...
متن کاملDeprojection of Rich Cluster Images
We consider a general method of deprojecting two-dimensional images to reconstruct the three dimensional structure of the projected object, assuming axial symmetry. The method consists of the application of the Fourier Slice Theorem to the general case where the axis of symmetry is not necessarily perpendicular to the line of sight, and is based on an extrapolation of the image Fourier transfor...
متن کاملEffect of the Point-Spread Function and Galaxy Ellipticity on the Derived Photometric Parameters
To complete the Tolman surface brightness test on the reality of the expansion of the Universe, we need to measure accurately the surface brightness profiles of the high-redshift galaxy sample. To quantify this accuracy, we investigate the effects of various sizes of point-spread functions composed of telescope diffraction, CCD pixel resolutions, and ground-based seeing on the measurements of m...
متن کاملDeprojection of Galaxy Cluster X - ray , Sunyaev - Zel ’ dovich Temperature Decrement and Weak Lensing Mass Maps
A general method of deprojecting two-dimensional images to reconstruct the three dimensional structure of the projected object – specifically X-ray, Sunyaev-Zel'dovich (SZ) and gravitational lensing maps of rich clusters of galaxies – assuming axial symmetry (Zaroubi et al. 1998), is considered. Here we test the applicability of the method for realistic, numerically simulated galaxy clusters, v...
متن کاملذخیره 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: Science China Physics, Mechanics and Astronomy
سال: 2010
ISSN: 1674-7348,1862-2844
DOI: 10.1007/s11433-010-0059-4