AMIBA: FIRST-YEAR RESULTS FOR SUNYAEV-ZEL'DOVICH EFFECT

We discuss the observation, analysis, and results of the first-year science operation of AMiBA, an interferometric experiment designed to study cosmology via the measurement of Cosmic Microwave Background (CMB). In 2007, we successfully observed 6 galaxy clusters (z < 0.33) through the Sunyaev-Zel'dovich effect. AMiBA is the first CMB interferometer operating at 86–102 GHz, currently with 7 close-packed antennas of 60 cm in diameter giving a synthesized resolution of around 6 arcminutes. An observing strategy with on-off-source modulation is used to remove the effects from electronic offset and ground pickup. Formalism of the analysis is given and preliminary science results are summarized. Tests for systematic effects are also addressed. We also discuss the expansion plan.

[1]  E. Leitch,et al.  FIRST SEASON QUaD CMB TEMPERATURE AND POLARIZATION POWER SPECTRA , 2008 .

[2]  P. A. R. Ade,et al.  MAXIPOL: Data Analysis and Results , 2006, astro-ph/0611392.

[3]  P. A. R. Ade,et al.  A Measurement of the CMB EE Spectrum from the 2003 Flight of BOOMERANG , 2005, astro-ph/0507514.

[4]  John E. Carlstrom,et al.  Degree Angular Scale Interferometer 3 Year Cosmic Microwave Background Polarization Results , 2005 .

[5]  P. Farese,et al.  First Measurements of the Polarization of the Cosmic Microwave Background Radiation at Small Angular Scales from CAPMAP , 2004, astro-ph/0409380.

[6]  J. Bond,et al.  Polarization Observations with the Cosmic Background Imager , 2001, Science.

[7]  The Sunyaev-Zeldovich Effect Signature of Excess Entropy in Distant, Massive Clusters , 2003, astro-ph/0303451.

[8]  Adrian T. Lee,et al.  Tests for Gaussianity of the MAXIMA-1 cosmic microwave background map. , 2001, Physical review letters.

[9]  S. Allen,et al.  Chandra measurements of the distribution of mass in the luminous lensing cluster Abell 2390 , 2000, astro-ph/0008517.

[10]  J. Carlstrom,et al.  The Distance and Mass of the Galaxy Cluster Abell 1995 Derived from Sunyaev-Zeldovich Effect and X-Ray Measurements , 2000 .

[11]  A. Fabian,et al.  ROSAT PSPC observations of 36 high‐luminosity clusters of galaxies: constraints on the gas fraction , 1999, astro-ph/9901304.

[12]  M. Birkinshaw,et al.  The Sunyaev-Zel’dovich Effect , 1998, astro-ph/9808050.

[13]  S. Allen,et al.  The impact of cooling flows on the TX–LBol relation for the most luminous clusters , 1998, astro-ph/9802218.

[14]  S. Allen,et al.  The relationship between cooling flows and metallicity measurements for X-ray-luminous clusters , 1998, astro-ph/9802219.

[15]  H.Inoue,et al.  ABELL 2163: Temperature, Mass, and Hydrostatic Equilibrium , 1995, astro-ph/9506090.

[16]  J. Dickey,et al.  H I in the Galaxy , 1990 .

[17]  W. Ku,et al.  X-ray survey of clusters of galaxies with the Einstein Observatory , 1983 .