Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Schuecker, Peter"'
The phases as well as the amplitudes of baryonic acoustic oscillations can be extracted out of a galaxy power spectrum and used as a standard ruler in a cosmological test. A non-oscillating phenomenological fitting function is used to extract the osc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0609354
Autor:
Fassbender, Rene, Stegmaier, Jutta, Weijmans, Anne-Marie, Koestner, Stefan, Kruselburger, Andreas, Diethart, Cornelia, Fertl, Peter, Valiante, Elisabetta, Hayes, Matthew, Schuecker, Peter, Hasinger, Guenther
We present a satellite mission concept to measure the dark energy equation of state parameter w with percent-level precision. The Very Ambitious Dark Energy Research satellite (VADER) is a multi-wavelength survey mission joining X-ray, optical, and I
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606688
Publikováno v:
Mon.Not.Roy.Astron.Soc. 362 (2005) 1225-1232
We compute the real-space cluster-galaxy cross-correlation xi_cg(r) using the ROSAT-ESO Flux Limited X-ray (REFLEX) cluster survey, a group catalogue constructed from the final version of the 2dFGRS, and galaxies extracted from 2MASS and APM surveys.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503185
Autor:
Schuecker, Peter
The review summarizes present and future applications of galaxy clusters to cosmology with emphasis on nearby X-ray clusters. The discussion includes the density of dark matter, the normalization of the matter power spectrum, neutrino masses, and esp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502234
Publikováno v:
Astron.Astrophys. 420 (2004) 61-74
A new method for a simultaneous search for clusters of galaxies in X-ray photon maps and optical galaxy maps is described. The merging of X-ray and optical data improves the source identification so that a large amount of telescope time for spectrosc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403116
Autor:
Amosov, Grigori, Schuecker, Peter
Publikováno v:
Astron.Astrophys. 421 (2004) 425-432
The excursion set model provides a convenient theoretical framework to derive dark matter halo abundances. This paper generalizes the model by introducing a more realistic merging and collapse process. A new parameter regulates the influence of the e
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402479
Autor:
Schuecker, Peter, Caldwell, Robert R., Böhringer, Hans, Collins, Chris A., Guzzo, Luigi, Weinberg, Nevin N.
Publikováno v:
Astron.Astrophys. 402 (2003) 53-64
New observational constraints on the cosmic matter density $\Omega_m$ and an effectively redshift-independent equation of state parameter $w_x$ of the dark energy are obtained while simultaneously testing the strong and null energy conditions of gene
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211480
Publikováno v:
Astron.Astrophys. 398 (2003) 867-878
For the first time the large-scale clustering and the mean abundance of galaxy clusters are analysed simultaneously to get precise constraints on the normalized cosmic matter density $\Omega_m$ and the linear theory RMS fluctuations in mass $\sigma_8
Externí odkaz:
http://arxiv.org/abs/astro-ph/0208251
Publikováno v:
Mon.Not.Roy.Astron.Soc.335:807,2002
The Karhunen-Lo\'{e}ve (KL) eigenvectors and eigenvalues of the sample correlation matrix are used to analyse the spatial fluctuations of the REFLEX clusters of galaxies. The method avoids the disturbing effects of correlated power spectral densities
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205342
Autor:
Schuecker, Peter, Boehringer, Hans, Guzzo, Luigi, Collins, Chris A., Neumann, Doris M., Schindler, Sabine, Voges, Wolfgang, De Grandi, Sabrina, Chincarini, Guido, Cruddace, Ray, Mueller, Volker, Reiprich, Thomas H., Retzlaff, Joerg, Shaver, Peter
We present a measure of the power spectrum on scales from 15 to 800 Mpc/h using the ROSAT-ESO Flux-Limited X-Ray(REFLEX) galaxy cluster catalogue. The REFLEX survey provides a sample of the 452 X-ray brightest southern clusters of galaxies with the n
Externí odkaz:
http://arxiv.org/abs/astro-ph/0012105