An arcminute-resolution search at 4.7 inverse centimeters for point source confusion to measurements of CMB anisotropy

S. E. Church, P. D. Mauskopf, P. A.R. Ade, M. J. Devlin, W. L. Holzapfel, T. M. Wilbanks, A. E. Lange

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We have searched for millimeter-wave emission from compact objects in two fields, each approximately 1 deg2 in size, taken from regions of the sky in which degree-scale structure in the cosmic microwave background (CMB) has recently been reported. The observations were made at a frequency of 4.7 cm-1 and an angular resolution of 1′.7, using the Sunyaev-Zeldovich Infrared Experiment (SuZIE) bolometer array at the Caltech Submillimeter Observatory (CSO). The first field was centered on 14h.92, +82° (1994.0), one of two regions in which Cheng et al. (1994) identify the signature of an unresolved point source seen during 0°.5 resolution observations at 5.6 cm-1 with the Medium Scale Anisotropy Measurement (MSAM) experiment. The second field was centered on 15h.47, +72°.4 (1994.0), part of the Gamma Ursae Minoris (GUM) region in which structure has been detected by Devlin et al. (1994) in 0°.55 resolution observations at 3.5 and 6 cm-1 with the Millimeter Anisotropy experiment (MAX). We find that there is no point source in either field that can account for the structure observed at 0°.5 resolution, and that the structure must arise from objects with an angular size greater than 2′.

Original languageEnglish (US)
Pages (from-to)L33-L36
JournalAstrophysical Journal
Volume440
Issue number2 PART 2
DOIs
StatePublished - Feb 20 1995

Keywords

  • Cosmic microwave background
  • Cosmology: observations

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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