The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000
We report on measurements of the cosmic microwave background (CMB) and celestial polarization at 146 GHz made with the Atacama Cosmology Telescope Polarimeter (ACTPol) in its first three months of observing. Four regions of sky covering a total of 270 square degrees were mapped with an angular resol...
| Egile Nagusiak: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formatua: | Journal article |
| Hizkuntza: | English |
| Argitaratua: |
Institute of Physics Publishing
2014
|
| _version_ | 1826295680960823296 |
|---|---|
| author | Naess, S Hasselfield, M McMahon, J Niemack, MD Addison, G Ade, P Allison, R Amiri, M Battaglia, N Beall, J de Bernardis, F Bond, JR Britton, J Calabrese, E Cho, H Coughlin, K Crichton, D Das, S Datta, R Devlin, M Dicker, SR Dunkley, J Duenner, R Fowler, J Fox, A |
| author_facet | Naess, S Hasselfield, M McMahon, J Niemack, MD Addison, G Ade, P Allison, R Amiri, M Battaglia, N Beall, J de Bernardis, F Bond, JR Britton, J Calabrese, E Cho, H Coughlin, K Crichton, D Das, S Datta, R Devlin, M Dicker, SR Dunkley, J Duenner, R Fowler, J Fox, A |
| author_sort | Naess, S |
| collection | OXFORD |
| description | We report on measurements of the cosmic microwave background (CMB) and celestial polarization at 146 GHz made with the Atacama Cosmology Telescope Polarimeter (ACTPol) in its first three months of observing. Four regions of sky covering a total of 270 square degrees were mapped with an angular resolution of 1.3′. The map noise levels in the four regions are between 11 and 17 μK-arcmin. We present TT, TE, EE, TB, EB, and BB power spectra from three of these regions. The observed E-mode polarization power spectrum, displaying six acoustic peaks in the range 200 < ℓ < 3000, is an excellent fit to the prediction of the best-fit cosmological models from WMAP9+ACT and Planck data. The polarization power spectrum, which mainly reflects primordial plasma velocity perturbations, provides an independent determination of cosmological parameters consistent with those based on the temperature power spectrum, which results mostly from primordial density perturbations. We find that without masking any point sources in the EE data at ℓ < 9000, the Poisson tail of the EE power spectrum due to polarized point sources has an amplitude less than 2.4 μ 2 at ℓ = 3000 at 95% confidence. Finally, we report that the Crab Nebula, an important polarization calibration source at microwave frequencies, has 8.7% polarization with an angle of 150.7 ± 0.6 when smoothed with a 5′ Gaussian beam. |
| first_indexed | 2024-03-07T04:04:47Z |
| format | Journal article |
| id | oxford-uuid:c5c70724-3d74-4c46-aa5c-a6d7ad235f1d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:04:47Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:c5c70724-3d74-4c46-aa5c-a6d7ad235f1d2022-03-27T06:33:33ZThe Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c5c70724-3d74-4c46-aa5c-a6d7ad235f1dEnglishSymplectic Elements at OxfordInstitute of Physics Publishing2014Naess, SHasselfield, MMcMahon, JNiemack, MDAddison, GAde, PAllison, RAmiri, MBattaglia, NBeall, Jde Bernardis, FBond, JRBritton, JCalabrese, ECho, HCoughlin, KCrichton, DDas, SDatta, RDevlin, MDicker, SRDunkley, JDuenner, RFowler, JFox, AWe report on measurements of the cosmic microwave background (CMB) and celestial polarization at 146 GHz made with the Atacama Cosmology Telescope Polarimeter (ACTPol) in its first three months of observing. Four regions of sky covering a total of 270 square degrees were mapped with an angular resolution of 1.3′. The map noise levels in the four regions are between 11 and 17 μK-arcmin. We present TT, TE, EE, TB, EB, and BB power spectra from three of these regions. The observed E-mode polarization power spectrum, displaying six acoustic peaks in the range 200 < ℓ < 3000, is an excellent fit to the prediction of the best-fit cosmological models from WMAP9+ACT and Planck data. The polarization power spectrum, which mainly reflects primordial plasma velocity perturbations, provides an independent determination of cosmological parameters consistent with those based on the temperature power spectrum, which results mostly from primordial density perturbations. We find that without masking any point sources in the EE data at ℓ < 9000, the Poisson tail of the EE power spectrum due to polarized point sources has an amplitude less than 2.4 μ 2 at ℓ = 3000 at 95% confidence. Finally, we report that the Crab Nebula, an important polarization calibration source at microwave frequencies, has 8.7% polarization with an angle of 150.7 ± 0.6 when smoothed with a 5′ Gaussian beam. |
| spellingShingle | Naess, S Hasselfield, M McMahon, J Niemack, MD Addison, G Ade, P Allison, R Amiri, M Battaglia, N Beall, J de Bernardis, F Bond, JR Britton, J Calabrese, E Cho, H Coughlin, K Crichton, D Das, S Datta, R Devlin, M Dicker, SR Dunkley, J Duenner, R Fowler, J Fox, A The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title | The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title_full | The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title_fullStr | The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title_full_unstemmed | The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title_short | The Atacama Cosmology Telescope: CMB polarization at 200 < l < 9000 |
| title_sort | atacama cosmology telescope cmb polarization at 200 lt l lt 9000 |
| work_keys_str_mv | AT naesss theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT hasselfieldm theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT mcmahonj theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT niemackmd theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT addisong theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT adep theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT allisonr theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT amirim theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT battaglian theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT beallj theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT debernardisf theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT bondjr theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT brittonj theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT calabresee theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT choh theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT coughlink theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT crichtond theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dass theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dattar theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT devlinm theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dickersr theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dunkleyj theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT duennerr theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT fowlerj theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT foxa theatacamacosmologytelescopecmbpolarizationat200ltllt9000 AT naesss atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT hasselfieldm atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT mcmahonj atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT niemackmd atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT addisong atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT adep atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT allisonr atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT amirim atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT battaglian atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT beallj atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT debernardisf atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT bondjr atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT brittonj atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT calabresee atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT choh atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT coughlink atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT crichtond atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dass atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dattar atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT devlinm atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dickersr atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT dunkleyj atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT duennerr atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT fowlerj atacamacosmologytelescopecmbpolarizationat200ltllt9000 AT foxa atacamacosmologytelescopecmbpolarizationat200ltllt9000 |