Detecting Sunyaev-Zel'dovich clusters with PLANCK

• Verfasst von: Schäfer, Björn Malte [VerfasserIn]
• Verfasst von: Bartelmann, Matthias [VerfasserIn]
• Titel: Detecting Sunyaev-Zel'dovich clusters with PLANCK
• Titelzusatz: II. foreground components and optimised filtering schemes
• Verf.angabe: B.M. Schaefer, C. Pfrommer, R. Hell, and M. Bartelmann
• Fussnoten: Gesehen am 25.09.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2008
• Band/Heft Quelle: (2008) Artikel-Nummer 0407090, 23 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1563781271

Abstract

The PLANCK mission is the most sensitive all-sky CMB experiment currently planned. The High Frequency Instrument (HFI) will be especially suited for observing clusters of galaxies by their thermal Sunyaev-Zel'dovich (SZ) effect. In order to assess PLANCKs SZ-capabilities in the presence of spurious signals, a simulation is presented that combines maps of the thermal and kinetic SZ-effects with a realisation of the cosmic microwave background (CMB), in addition to Galactic foregrounds (synchrotron emission, free-free emission, thermal emission from dust, CO-line radiation) as well as the sub-millimetric emission from celestial bodies of our Solar system. Additionally, observational issues such as the finite angular resolution and spatially non-uniform instrumental noise of PLANCKs sky maps are taken into account, yielding a set of all-sky flux maps, the auto-correlation and cross-correlation properties of which are examined in detail. In the second part of the paper, filteringschemes based on scale-adaptive and matched filtering are extended to spherical data sets, that enable the amplification of the weak SZ-signal in the presence of all contaminations stated above. The theory of scale-adaptive and matched filtering in the framework of spherical maps is developed, the resulting filter kernel shapes are discussed and their functionality is verified.