نحن نقدم نتائج من الموسمين الثاني والثالث من الملاحظات مع تجربة QUaD. تم توليد طيفات القوة المئوية لإشعاع الصوت المجرد من الخلفية الكوكبية لكلا الحرارة والتوزيع المحاكم في كلا 100 غيغاهرتز و150 غيغاهرتز، وكطيفات متصلة بين الترددات. تم تطبيق مجموعة من الاختبارات بالكنجنايف للتحقق من أي اختلالات نظامية محتملة. للحصول على نتائج دقيقة، هذه الاختلالات لم يتم الكشف عنها. نحن نحلل الخريطة الفرقية التي تم تشكيلها بين الحزمتين 100 و150 غيغاهرتز ولا نجد أي دليل على وجود اختلالات أمامية في التوزيع المحاكم. ثم تم دمج الطيفات لتشكيل مجموعة واحدة من النتائج التي تظهر أنها متطابقة مع النموذج المعتاد LCDM. حساسية نتائج التوزيع المحاكم أكثر من أي تجربة سابقة - لأول مرة تم الكشف عن عوامل موسيقية متعددة بشكل معنوي عالي.
We report results from the second and third seasons of observation with the QUaD experiment. Angular power spectra of the Cosmic Microwave Background are derived for both temperature and polarization at both 100 GHz and 150 GHz, and as cross frequency spectra. All spectra are subjected to an extensive set of jackknife tests to probe for possible systematic contamination. For the implemented data cuts and processing technique such contamination is undetectable. We analyze the difference map formed between the 100 and 150 GHz bands and find no evidence of foreground contamination in polarization. The spectra are then combined to form a single set of results which are shown to be consistent with the prevailing LCDM model. The sensitivity of the polarization results is considerably better than that of any previous experiment -- for the first time multiple acoustic peaks are detected in the E-mode power spectrum at high significance.
QUaD is a bolometric CMB polarimeter sited at the South Pole, operating at frequencies of 100 and 150 GHz. In this paper we report preliminary results from the first season of operation (austral winter 2005). All six CMB power spectra are presented d
We present an improved analysis of the final dataset from the QUaD experiment. Using an improved technique to remove ground contamination, we double the effective sky area and hence increase the precision of our CMB power spectrum measurements by ~30
We constrain parity-violating interactions to the surface of last scattering using spectra from the QUaD experiments second and third seasons of observations by searching for a possible systematic rotation of the polarization directions of CMB photon
The Chern-Simons term, through which the cosmic Axion-like field couples to the electromagnetic field, has the effect to rotate CMB polarization directions and to break the CPT symmetry. This rotation will change the CMB power spectra, no matter isot
In this paper we present a parameter estimation analysis of the polarization and temperature power spectra from the second and third season of observations with the QUaD experiment. QUaD has for the first time detected multiple acoustic peaks in the