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dc.creatorGold, B.en_US
dc.creatorOdegard, N.en_US
dc.creatorWeiland, J. L.en_US
dc.creatorHill, R. S.en_US
dc.creatorKogut, A.en_US
dc.creatorBennett, C. L.en_US
dc.creatorHinshaw, G.en_US
dc.creatorChen, X.en_US
dc.creatorDunkley, J.en_US
dc.creatorHalpern, M.en_US
dc.creatorJarosik, N.en_US
dc.creatorKomatsu, Eiichiroen_US
dc.creatorLarson, D.en_US
dc.creatorLimon, M.en_US
dc.creatorMeyer, S. S.en_US
dc.creatorNolta, M. R.en_US
dc.creatorPage, L.en_US
dc.creatorSmith, K. M.en_US
dc.creatorSpergel, D. N.en_US
dc.creatorTucker, G. S.en_US
dc.creatorWollack, E.en_US
dc.creatorWright, E. L.en_US
dc.date.accessioned2016-10-28T19:35:58Z
dc.date.available2016-10-28T19:35:58Z
dc.date.issued2011-02en_US
dc.identifierdoi:10.15781/T2154DR6B
dc.identifier.citationGold, B. "Seven-year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission. ApJS, 192: 15." arXiv preprint arXiv:1001.4555 27 (Feb., 2011): 53-54.en_US
dc.identifier.issn0067-0049en_US
dc.identifier.urihttp://hdl.handle.net/2152/42998
dc.description.abstractWe present updated estimates of Galactic foreground emission using seven years of WMAP data. Using the power spectrum of differences between multi-frequency template-cleaned maps, we find no evidence for foreground contamination outside of the updated (KQ85y7) foreground mask. We place a 15 mu K upper bound on rms foreground contamination in the cleaned maps used for cosmological analysis. Further, the cleaning process requires only three power-law foregrounds outside of the mask. We find no evidence for polarized foregrounds beyond those from soft (steep-spectrum) synchrotron and thermal dust emission; in particular we find no indication in the polarization data of an extra "haze" of hard synchrotron emission from energetic electrons near the Galactic center. We provide an updated map of the cosmic microwave background (CMB) using the internal linear combination method, updated foreground masks, and updates to point source catalogs using two different techniques. With additional years of data, we now detect 471 point sources using a five-band technique and 417 sources using a three-band CMB-free technique. In total there are 62 newly detected point sources, a 12% increase over the five-year release. Also new are tests of the Markov chain Monte Carlo foreground fitting procedure against systematics in the time-stream data, and tests against the observed beam asymmetry. Within a few degrees of the Galactic plane, the behavior in total intensity of low-frequency foregrounds is complicated and not completely understood. WMAP data show a rapidly steepening spectrum from 20 to 40 GHz, which may be due to emission from spinning dust grains, steepening synchrotron, or other effects. Comparisons are made to a 1 deg 408 MHz map (Haslam et al.) and the 11 deg ARCADE 2 data (Singal et al.). We find that spinning dust or steepening synchrotron models fit the combination of WMAP and 408 MHz data equally well. ARCADE data appear inconsistent with the steepening synchrotron model and consistent with the spinning dust model, though some discrepancies remain regarding the relative strength of spinning dust emission. More high-resolution data in the 10-40 GHz range would shed much light on these issues.en_US
dc.description.sponsorshipScience Mission Directorate Office at NASA Headquartersen_US
dc.description.sponsorshipNASA NNG05GE76G, NNX07AL75G S01, LTSA03-000-0090, ATPNNG04GK55G, ADP03-0000-092en_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectcosmic background radiationen_US
dc.subjectcosmology: observationsen_US
dc.subjectdiffuse radiationen_US
dc.subjectgalaxy: haloen_US
dc.subjectgalaxy: structureen_US
dc.subjectism: structureen_US
dc.subjectnrao pmn surveysen_US
dc.subjectspinning dust grainsen_US
dc.subjectpoint-source searchen_US
dc.subjectsourceen_US
dc.subjectcatalogen_US
dc.subjectmapsen_US
dc.subjectskyen_US
dc.subjectradiationen_US
dc.subjectparametersen_US
dc.subjectprospectsen_US
dc.subjectregionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleSeven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic foreground Emissionen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0067-0049/192/2/15en_US
dc.contributor.utaustinauthorKomatsu, Eiichiroen_US
dc.relation.ispartofserialAstrophysical Journal Supplement Seriesen_US


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