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Detecting Sunyaev-Zel'dovich clusters with PLANCK: II. Foreground components and optimised filtering schemes
Astrophysics · Submitted 5 Jul 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In the second part of the paper, filtering schemes 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.
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The abstract, sentence by sentence
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, filtering schemes 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.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The PLANCK mission is the most sensitive all-sky CMB experiment currently planned. | background 1.00 | 0.06 | 0.02 | asserted 1.00 |
| s1 | The High Frequency Instrument (HFI) will be especially suited for observing clusters of galaxies by their thermal Sunyaev-Zel'dovich (SZ) effect. | background 0.97 | 0.09 | 0.05 | asserted 0.78 |
| s2 | 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. | method 0.90 | 0.90 | 0.04 | asserted 0.98 |
| s3 | 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. | method 0.91 | 0.88 | 0.04 | asserted 1.00 |
| s4 | In the second part of the paper, filtering schemes 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. | method 0.53 | 0.83 | 0.17 | asserted 1.00 |
| s5 | 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. | method 0.58 | 0.89 | 0.13 | asserted 1.00 |
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Original 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, filtering schemes 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.
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1 arXiv paper cite this in 4 sentences
Papers citing it · 2 sentences without a confident label
Contests it 1 paper
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Furthermore, although the scale-adaptive filter has been derived on the sphere by [ref] , small-angle approximations are made in these derivations; hence the scale-adaptive filter constraints may break down for sources of very large size, such as the bubble collision signatures of interest.
Optimal filters for detecting cosmic bubble collisions · Optimal filters · contest 0.75
Cites it as background 1 paper
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Alternative optimal filters have also been proposed, such as the scale-adaptive filter, defined in Euclidean space by [ref] and extended to the sphere by [ref] .
Optimal filters for detecting cosmic bubble collisions · Optimal filters · 0.87
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