دورية أكاديمية
Interpretation of the ARCADE 2 Absolute Sky Brightness Measurement
| العنوان: | Interpretation of the ARCADE 2 Absolute Sky Brightness Measurement |
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| المؤلفون: | Seiffert, M., Fixsen, D. J., Kogut, A., Levin, S. M., Limon, M., Lubin, P. M., Mirel, P., Singal, Jack, Villela, T., Wollack, E., Wuensche, C. A. |
| المصدر: | Physics Faculty Publications |
| بيانات النشر: | UR Scholarship Repository |
| سنة النشر: | 2011 |
| المجموعة: | University of Richmond: UR Scholarship Repository |
| مصطلحات موضوعية: | cosmic background radiation, cosmology observations, Astrophysics and Astronomy, Cosmology, Relativity, and Gravity, Stars, Interstellar Medium and the Galaxy |
| الوصف: | We use absolutely calibrated data between 3 and 90 GHz from the 2006 balloon flight of the ARCADE 2 instrument, along with previous measurements at other frequencies, to constrain models of extragalactic emission. Such emission is a combination of the cosmic microwave background (CMB) monopole, Galactic foreground emission, the integrated contribution of radio emission from external galaxies, any spectral distortions present in the CMB, and any other extragalactic source. After removal of estimates of foreground emission from our own Galaxy, and an estimated contribution of external galaxies, we present fits to a combination of the flat-spectrum CMB and potential spectral distortions in the CMB.We find 2σ upper limits to CMB spectral distortions ofμ < 6×10−4 and |Yff| < 1×10−4. We also find a significant detection of a residual signal beyond that, which can be explained by the CMB plus the integrated radio emission from galaxies estimated from existing surveys. This residual signal may be due to an underestimated galactic foreground contribution, an unaccounted for contribution of a background of radio sources, or some combination of both. The residual signal is consistent with emission in the form of a power law with amplitude 18.4 ± 2.1 K at 0.31 GHz and a spectral index of −2.57 ± 0.05. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | https://scholarship.richmond.edu/physics-faculty-publications/6Test; https://scholarship.richmond.edu/context/physics-faculty-publications/article/1009/viewcontent/Singal_Interpretation_of_the_ARCADE_2_Absolute.pdfTest |
| DOI: | 10.1088/0004-637X/734/1/6 |
| الإتاحة: | https://doi.org/10.1088/0004-637X/734/1/6Test https://scholarship.richmond.edu/physics-faculty-publications/6Test https://scholarship.richmond.edu/context/physics-faculty-publications/article/1009/viewcontent/Singal_Interpretation_of_the_ARCADE_2_Absolute.pdfTest |
| رقم الانضمام: | edsbas.C818174E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/0004-637X/734/1/6 |
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