A High Spatial Resolution Analysis of the MAXIMA-1 Cosmic Microwave Background Anisotropy Data

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Published 2001 October 16 • © 2001. The American Astronomical Society. All rights reserved. Printed in U.S.A.
, , Citation A. T. Lee et al 2001 ApJ 561 L1 DOI 10.1086/324437

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Author affiliations

1 Department of Physics, University of California at Berkeley, 366 Le Conte Hall, Berkeley, CA 94720

2 Division of Physics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720

3 Center for Particle Astrophysics, University of California at Berkeley, 301 Le Conte Hall, Berkeley, CA 94720

4 Queen Mary and Westfield College, Mile End Road, London E14NS, England, UK

5 Dipartimento di Fisica, Università Tor Vergata, Via del la Ricerca Scientifica, I-00133 Roma, Italy

6 Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109

7 California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125

8 National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720

9 IROE-CNR, 64 Via Panciatichi, 50127 Firenze, Italy

10 Dipartimento di Fisica, Università di Roma, "La Sapienza," 2 Piazzale A. Moro, 00185 Roma, Italy

11 Department of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, England, UK

12 CENTRA, Instituto Superior Tecnico, 1096 Av. Rovisco Pais, Lisboa, Portugal

13 School of Physics and Astronomy, University of Minnesota/Twin Cities, 116 Church Street, SE, Minneapolis, MN 55455

14 Department of Physics and Astronomy, University of Wales, 5 The Parade, Newport Road, Cardiff CF2 3YB, Wales, UK

15 Department of Physics and Astronomy, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A1, Canada

16 Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA 94720

17 Copernicus Astronomical Center, ul. Bartycka 18, Warszawa PL-00-716, Poland

18 Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720

Dates

  1. Received 2001 April 30
  2. Accepted 2001 September 19
  3. Published
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1538-4357/561/1/L1

Abstract

We extend the analysis of the MAXIMA-1 cosmic microwave background data to smaller angular scales. MAXIMA, a bolometric balloon-borne experiment, mapped a 124 deg2 region of the sky with 10' resolution at frequencies of 150, 240, and 410 GHz during its first flight. The original analysis, which covered the multipole range 36 ≤ l ≤ 785 using a 100 deg2 map, is extended to l = 1235 using a subset of the data from three 150 GHz photometers in the fully cross-linked central 60 deg2 of the map. The main improvement over the original analysis is the use of 3' square pixels in the calculation of the map. The new analysis is consistent with the original for l < 785. For l > 785, where inflationary models predict a third acoustic peak, the new analysis shows power with an amplitude of 56 ± 7 μK at l ≃ 850 in excess to the average power of 42 ± 3 μK in the range 441 < l < 785.

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10.1086/324437