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Cited by 223Cosmology and Gravitation TheoriesAstrophysics and Star Formation StudiesDark Matter and Cosmic Phenomena

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Extended Anomalous Foreground Emission in the WMAP Three‐Year Data

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Dobler, Gregory, Finkbeiner, Douglas P.·2008·The Astrophysical Journal
DOI 10.1086/587862
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Abstract

We study the spectral and morphological characteristics of the diffuse Galactic emission in the WMAP temperature data using a template-based multilinear regression, and obtain the following results. (1) We confirm previous observations of a bump in the dust-correlated spectrum, consistent with the Draine & Lazarian spinning dust model. (2) We also confirm the "haze" signal in the inner Galaxy, and argue that it does not follow a free-free spectrum as first thought, but instead is synchrotron emission from a hard electron cosmic-ray population. (3) In a departure from previous work, we allow the spectrum of Hα-correlated emission (which is used to trace the free-free component) to float in the fit, and find that it does not follow the expected free-free spectrum. Instead there is a bump near 50 GHz, modifying the spectrum at the 20% level, which we speculate is caused by spinning dust in the warm ionized medium. (4) The derived cross-correlation spectra are not sensitive to the map zero points, but are sensitive to the choice of CMB estimator. In cases where the CMB estimator is derived by minimizing variance of a linear combination of the WMAP bands, we show that a bias proportional to the cross-correlation of each template and the true CMB is always present. This bias can be larger than any of the foreground signals in some bands. (5) Lastly, we consider the frequency coverage and sensitivity of the Planck mission, and suggest linear combination coefficients for the CMB template that will reduce both the statistical and systematic uncertainty in the synchrotron and haze spectra by more than an order of magnitude.

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Research works printed but not linked: 3

  1. Gorski, K. M., Hivon, E. & Wandelt, B. D. 1999, in MPA/ESO Cosmology Conf. on Evolution of Large-Scale Structure, ed. A. J. Banday, R. K. Sheth, & L. N. da Costa (Garching: ESO), 37
  2. Haslam C. G. T., 1982, A&AS, 47, 1
  3. Hooper D., 2007, Phys. Rev. D, 76, 3012

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Metadata

Authors
Dobler, G., & Finkbeiner, D. P.
Affiliations
Harvard University (US)
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2008-06-20
Volume
680
Issue
2
Pages
1222-1234
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/587862
OpenAlex
W1970145818
Cited by
223
References
36
Citations by year
2024: 3 · 2023: 5 · 2022: 11 · 2021: 6 · 2020: 5 · 2019: 3 · 2018: 7 · 2017: 6 · 2016: 10 · 2015: 16 · 2014: 10 · 2013: 20 · 2012: 28
FWCI
18.08
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • arXiv (Cornell University)
Funders
  • National Aeronautics and Space Administration (NAG512972, 12972)
  • Goddard Space Flight Center
  • Astrophysics Division
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
Keywords
spinning dust, synchrotron radiation, free-free emission, H-alpha emission, warm ionized medium, WMAP three-year data

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