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 language | English (US) |
---|---|
Pages (from-to) | L33-L36 |
Journal | Astrophysical Journal |
Volume | 440 |
Issue number | 2 PART 2 |
DOIs | |
State | Published - Feb 20 1995 |
Externally published | Yes |
Keywords
- Cosmic microwave background
- Cosmology: observations
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science