Galactic microwave emission at degree angular scales

Angélica De Oliveira-Costa; A. Kogut; Mark J. Deviln; C. Barth Netterfield; Lyman A. Page; Edward J. Wollack

doi:10.1086/310684

Galactic microwave emission at degree angular scales

Angélica De Oliveira-Costa, A. Kogut, Mark J. Deviln, C. Barth Netterfield, Lyman A. Page, Edward J. Wollack

Research output: Contribution to journal › Article › peer-review

121 Scopus citations

Abstract

We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.

Original language	English (US)
Pages (from-to)	L17-L20
Journal	Astrophysical Journal
Volume	482
Issue number	1 PART II
DOIs	https://doi.org/10.1086/310684
State	Published - 1997

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmic microwave background
Methods: data analysis

Access to Document

10.1086/310684

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@article{228b183b84d54bc2a0b71f8e00f1fe7f,

title = "Galactic microwave emission at degree angular scales",

abstract = "We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.",

keywords = "Cosmic microwave background, Methods: data analysis",

author = "{De Oliveira-Costa}, Ang{\'e}lica and A. Kogut and Deviln, {Mark J.} and {Barth Netterfield}, C. and Page, {Lyman A.} and Wollack, {Edward J.}",

year = "1997",

doi = "10.1086/310684",

language = "English (US)",

volume = "482",

pages = "L17--L20",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - Galactic microwave emission at degree angular scales

AU - De Oliveira-Costa, Angélica

AU - Kogut, A.

AU - Deviln, Mark J.

AU - Barth Netterfield, C.

AU - Page, Lyman A.

AU - Wollack, Edward J.

PY - 1997

Y1 - 1997

N2 - We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.

AB - We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with the Diffuse Infrared Background Experiment (DIRBE) 240, 140, and 100 μm maps, but we find no significant correlation with point sources, with the Haslam 408 MHz map, or with the Reich and Reich 1420 MHz map. The rms amplitude of the component correlated with DIRBE is about 20% of the CMB signal. Interpreting this component as free-free emission, this normalization agrees with that of the 1996 works of Kogut et al. and supports the hypothesis that the spatial correlation between dust and warm ionized gas observed on large angular scales persists to smaller angular scales. Subtracting this contribution from the CMB data reduces the normalization of the Saskatoon power spectrum by only a few percent.

KW - Cosmic microwave background

KW - Methods: data analysis

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U2 - 10.1086/310684

DO - 10.1086/310684

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