SUBDEGREE SUNYAEV-ZEL'DOVICH SIGNAL FROM MULTIFREQUENCY BOOMERANG OBSERVATIONS

Journal Article · Tue Sep 01 04:00:00 EDT 2009 · Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/702/1/L61; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21333806

Veneziani, M; Amblard, A; Cooray, A; Serra, P ^[1]; Piacentini, F; De Bernardis, P ^[2]; Pietrobon, D; Cabella, P; De Gasperis, G; De Troia, G ^[3]; Ade, P A. R. ^[4]; Bock, J J; Crill, B P ^[5]; Bond, J R ^[6]; Borrill, J ^[7]; Boscaleri, A ^[8]; Contaldi, C R ^[9]; De Oliveira-Costa, A ^[10]; Di Stefano, G ^[11]

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1. Center for Cosmology, University of California, Irvine, CA 92697 (United States)
2. Dipartimento di Fisica, Universita di Roma 'La Sapienza', Rome (Italy)
3. Dipartimento di Fisica, Universita di Roma 'Tor Vergata', Rome (Italy)
4. Department of Physics and Astronomy, Cardiff University, Cardiff (United Kingdom)
5. Jet Propulsion Laboratory, Pasadena, CA 91109 (United States)
6. CITA, University of Toronto, Toronto, ON M5S 3H8 (Canada)
7. Computational Research Division, LBNL, Berkeley, CA 94720 (United States)
8. IFAC-CNR, 50127, Firenze (Italy)
9. Theoretical Physics Group, Imperial College, London (United Kingdom)
10. Department of Physics, MIT, Cambridge, MA 02139 (United States)
11. Istituto Nazionale di Geofisica e Vulcanologia, 00143 Rome (Italy)

The Sunyaev-Zel'dovich (SZ) effect is the inverse Compton-scattering of cosmic microwave background (CMB) photons by hot electrons in the intervening gas throughout the universe. The effect has a distinct spectral signature that allows its separation from other signals in multifrequency CMB data sets. Using CMB anisotropies measured at three frequencies by the BOOMERANG 2003 flight we constrain SZ fluctuations in the 10 arcmin to 1 deg angular range. Propagating errors and potential systematic effects through simulations, we obtain an overall upper limit of 15.3 {mu}K (2{sigma}) for rms SZ fluctuations in a broad bin between multipoles of 250 and 1200 at the Rayleigh-Jeans (RJ) end of the spectrum. The resulting upper limit on the local universe normalization of the density perturbations with BOOMERANG SZ data alone is {sigma}{sup SZ} {sub 8} < 1.14 at the 95% confidence level. When combined with other CMB anisotropy and SZ measurements, we find {sigma}{sup SZ} {sub 8} < 0.92 (95% c.l.)

• OSTI ID: 21333806
• Journal Information: Astrophysical Journal (Online), Journal Name: Astrophysical Journal (Online) Journal Issue: 1 Vol. 702; ISSN 1538-4357
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANISOTROPY
COMPTON EFFECT
COSMOLOGY
ELECTRONS
MULTIPOLES
PERTURBATION THEORY
PHOTONS
RELICT RADIATION
SIGNALS
SIMULATION
SPECTRA
UNIVERSE