Galactic Foreground Contribution to the BEAST Cosmic Microwave Background Anisotropy Maps (Articolo in rivista)

Type
Label
  • Galactic Foreground Contribution to the BEAST Cosmic Microwave Background Anisotropy Maps (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1086/429090 (literal)
Alternative label
  • Mejia J., Bersanelli M., Burigana C., Childers J., Figuereido N., Kanga M., Lubin P., Maino D., Mandolesi N., Marvil J., Meinhold P., O'Dwyer I., O'Neill H., Platania P., Seiffert M., Stebor N., Tello C., Villela T., Wandelt B. and Wuensche C.A. (2005)
    Galactic Foreground Contribution to the BEAST Cosmic Microwave Background Anisotropy Maps
    in Astrophysical journal. Supplement series (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mejia J., Bersanelli M., Burigana C., Childers J., Figuereido N., Kanga M., Lubin P., Maino D., Mandolesi N., Marvil J., Meinhold P., O'Dwyer I., O'Neill H., Platania P., Seiffert M., Stebor N., Tello C., Villela T., Wandelt B. and Wuensche C.A. (literal)
Pagina inizio
  • 109 (literal)
Pagina fine
  • 117 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0067-0049/158/1/109/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 158-1 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Inst Nacl Pesquisas Espaciais, Div Astrofis, BR-12210070 Sao Jose Dos Campos, SP, Brazil [ 2 ] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy [ 3 ] CNR, IASF, Sez Bologna, I-40129 Bologna, Italy [ 4 ] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA [ 5 ] Univ Fed Itajuba, Dept Quim & Fis, BR-37500903 Itajuba, MG, Brazil [ 6 ] Univ Calif, White Mt Res Stn, CA 93514 USA [ 7 ] Univ Illinois, Dept Astron, Urbana, IL 61801 USA [ 8 ] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA (literal)
Titolo
  • Galactic Foreground Contribution to the BEAST Cosmic Microwave Background Anisotropy Maps (literal)
Abstract
  • We report limits on the Galactic foreground emission contribution to the Background Emission Anisotropy Scanning Telescope (BEAST) Ka- and Q-band CMB anisotropy maps. We estimate the contribution from the cross-correlations between these maps and the foreground emission templates of an H alpha map, a destriped version of the Haslam et al. 408 MHz map, and a combined 100 mu m IRAS DIRBE map. Our analysis samples the BEAST similar to 10 degrees declination band into 24 one-hour (R. A.) wide sectors with similar to 7900 pixels each, where we calculate (1) the linear correlation coefficient between the anisotropy maps and the templates; (2) the coupling constants between the specific intensity units of the templates and the antenna temperature at the BEAST frequencies; and (3) the individual foreground contributions to the BEAST anisotropy maps. The peak sector contributions of the contaminants in the Ka-band are of 56.5% free-free with a coupling constant of 8.3 +/- 0.4 mu K R-1, and 67.4% dust with 45.0 +/- 2.0 mu K MJy(-1) sr(-1). In the Q band the corresponding values are of 64.4% free-free with 4.1 +/- 0.2 mu K R-1 and 67.5% dust with 24.0 +/- 1.0 mu K MJy(-1) sr(-1). Using a lower limit of 10% in the relative uncertainty of the coupling constants, we can constrain the sector contributions of each contaminant in both maps to <20% in 21 (free-free), 19 (dust), and 22 (synchrotron) sectors. At this level, all these sectors are found outside of the vertical bar b vertical bar = 14.degrees 6 region. By performing the same correlation analysis as a function of Galactic scale height, we conclude that the region within b = +/- 17.degrees 5 should be removed from the BEAST maps for CMB studies in order to keep individual Galactic contributions below similar to 1% of the map's rms. (literal)
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