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...
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| Veröffentlicht in: | Journal of cosmology and astroparticle physics 2014-10, Vol.2014 (10), p.7-7 |
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| creator | Naess, Sigurd Hasselfield, Matthew McMahon, Jeff Niemack, Michael D. Addison, Graeme E. Ade, Peter A. R. Allison, Rupert Amiri, Mandana Battaglia, Nick Beall, James A. de Bernardis, Francesco Bond, J Richard Britton, Joe Calabrese, Erminia Cho, Hsiao-mei Coughlin, Kevin Crichton, Devin Das, Sudeep Datta, Rahul Devlin, Mark J. Dicker, Simon R. Dunkley, Joanna Dünner, Rolando Fowler, Joseph W. Fox, Anna E. Gallardo, Patricio Grace, Emily Gralla, Megan Hajian, Amir Halpern, Mark Henderson, Shawn Hill, J. Colin Hilton, Gene C. Hilton, Matt Hincks, Adam D. Hlozek, Renée Ho, Patty Hubmayr, Johannes Huffenberger, Kevin M. Hughes, John P. Infante, Leopoldo Irwin, Kent Jackson, Rebecca Kasanda, Simon Muya Klein, Jeff Koopman, Brian Kosowsky, Arthur Li, Dale Louis, Thibaut Lungu, Marius Madhavacheril, Mathew Marriage, Tobias A. Maurin, Loïc Menanteau, Felipe Moodley, Kavilan Munson, Charles Newburgh, Laura Nibarger, John Nolta, Michael R. Page, Lyman A. Pappas, Christine Partridge, Bruce Rojas, Felipe Schmitt, Benjamin L. Sehgal, Neelima Sherwin, Blake D. Sievers, Jon Simon, Sara Spergel, David N. Staggs, Suzanne T. Switzer, Eric R. Thornton, Robert Trac, Hy Tucker, Carole Uehara, Masao Engelen, Alexander Van Ward, Jonathan T. Wollack, Edward J. |
| 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 |
| doi_str_mv | 10.1088/1475-7516/2014/10/007 |
| format | Article |
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R. ; Allison, Rupert ; Amiri, Mandana ; Battaglia, Nick ; Beall, James A. ; de Bernardis, Francesco ; Bond, J Richard ; Britton, Joe ; Calabrese, Erminia ; Cho, Hsiao-mei ; Coughlin, Kevin ; Crichton, Devin ; Das, Sudeep ; Datta, Rahul ; Devlin, Mark J. ; Dicker, Simon R. ; Dunkley, Joanna ; Dünner, Rolando ; Fowler, Joseph W. ; Fox, Anna E. ; Gallardo, Patricio ; Grace, Emily ; Gralla, Megan ; Hajian, Amir ; Halpern, Mark ; Henderson, Shawn ; Hill, J. Colin ; Hilton, Gene C. ; Hilton, Matt ; Hincks, Adam D. ; Hlozek, Renée ; Ho, Patty ; Hubmayr, Johannes ; Huffenberger, Kevin M. ; Hughes, John P. ; Infante, Leopoldo ; Irwin, Kent ; Jackson, Rebecca ; Kasanda, Simon Muya ; Klein, Jeff ; Koopman, Brian ; Kosowsky, Arthur ; Li, Dale ; Louis, Thibaut ; Lungu, Marius ; Madhavacheril, Mathew ; Marriage, Tobias A. ; Maurin, Loïc ; Menanteau, Felipe ; Moodley, Kavilan ; Munson, Charles ; Newburgh, Laura ; Nibarger, John ; Nolta, Michael R. ; Page, Lyman A. ; Pappas, Christine ; Partridge, Bruce ; Rojas, Felipe ; Schmitt, Benjamin L. ; Sehgal, Neelima ; Sherwin, Blake D. ; Sievers, Jon ; Simon, Sara ; Spergel, David N. ; Staggs, Suzanne T. ; Switzer, Eric R. ; Thornton, Robert ; Trac, Hy ; Tucker, Carole ; Uehara, Masao ; Engelen, Alexander Van ; Ward, Jonathan T. ; Wollack, Edward J.</creator><creatorcontrib>Naess, Sigurd ; Hasselfield, Matthew ; McMahon, Jeff ; Niemack, Michael D. ; Addison, Graeme E. ; Ade, Peter A. R. ; Allison, Rupert ; Amiri, Mandana ; Battaglia, Nick ; Beall, James A. ; de Bernardis, Francesco ; Bond, J Richard ; Britton, Joe ; Calabrese, Erminia ; Cho, Hsiao-mei ; Coughlin, Kevin ; Crichton, Devin ; Das, Sudeep ; Datta, Rahul ; Devlin, Mark J. ; Dicker, Simon R. ; Dunkley, Joanna ; Dünner, Rolando ; Fowler, Joseph W. ; Fox, Anna E. ; Gallardo, Patricio ; Grace, Emily ; Gralla, Megan ; Hajian, Amir ; Halpern, Mark ; Henderson, Shawn ; Hill, J. Colin ; Hilton, Gene C. ; Hilton, Matt ; Hincks, Adam D. ; Hlozek, Renée ; Ho, Patty ; Hubmayr, Johannes ; Huffenberger, Kevin M. ; Hughes, John P. ; Infante, Leopoldo ; Irwin, Kent ; Jackson, Rebecca ; Kasanda, Simon Muya ; Klein, Jeff ; Koopman, Brian ; Kosowsky, Arthur ; Li, Dale ; Louis, Thibaut ; Lungu, Marius ; Madhavacheril, Mathew ; Marriage, Tobias A. ; Maurin, Loïc ; Menanteau, Felipe ; Moodley, Kavilan ; Munson, Charles ; Newburgh, Laura ; Nibarger, John ; Nolta, Michael R. ; Page, Lyman A. ; Pappas, Christine ; Partridge, Bruce ; Rojas, Felipe ; Schmitt, Benjamin L. ; Sehgal, Neelima ; Sherwin, Blake D. ; Sievers, Jon ; Simon, Sara ; Spergel, David N. ; Staggs, Suzanne T. ; Switzer, Eric R. ; Thornton, Robert ; Trac, Hy ; Tucker, Carole ; Uehara, Masao ; Engelen, Alexander Van ; Ward, Jonathan T. ; Wollack, Edward J.</creatorcontrib><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 {sup 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{sup o} ± 0.6{sup o} when smoothed with a 5' Gaussian beam.</description><identifier>ISSN: 1475-7516</identifier><identifier>EISSN: 1475-7516</identifier><identifier>DOI: 10.1088/1475-7516/2014/10/007</identifier><language>eng</language><publisher>United States</publisher><subject>AMPLITUDES ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; CALIBRATION ; COSMOLOGICAL MODELS ; COSMOLOGY ; CRAB NEBULA ; GHZ RANGE 100-1000 ; NOISE ; PEAKS ; PERTURBATION THEORY ; POINT SOURCES ; POLARIMETERS ; POLARIZATION ; RELICT RADIATION ; RESOLUTION ; SPECTRA ; TELESCOPES</subject><ispartof>Journal of cosmology and astroparticle physics, 2014-10, Vol.2014 (10), p.7-7</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c394t-613312d9397f83dc53d3ce7777cf0b71cf7bb0be8c881c684462ac6f64bd5ba73</citedby><cites>FETCH-LOGICAL-c394t-613312d9397f83dc53d3ce7777cf0b71cf7bb0be8c881c684462ac6f64bd5ba73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,777,781,882,27905,27906</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22375848$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Naess, Sigurd</creatorcontrib><creatorcontrib>Hasselfield, Matthew</creatorcontrib><creatorcontrib>McMahon, Jeff</creatorcontrib><creatorcontrib>Niemack, Michael D.</creatorcontrib><creatorcontrib>Addison, Graeme E.</creatorcontrib><creatorcontrib>Ade, Peter A. 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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 {sup 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{sup o} ± 0.6{sup o} when smoothed with a 5' Gaussian beam.</description><subject>AMPLITUDES</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>CALIBRATION</subject><subject>COSMOLOGICAL MODELS</subject><subject>COSMOLOGY</subject><subject>CRAB NEBULA</subject><subject>GHZ RANGE 100-1000</subject><subject>NOISE</subject><subject>PEAKS</subject><subject>PERTURBATION THEORY</subject><subject>POINT SOURCES</subject><subject>POLARIMETERS</subject><subject>POLARIZATION</subject><subject>RELICT RADIATION</subject><subject>RESOLUTION</subject><subject>SPECTRA</subject><subject>TELESCOPES</subject><issn>1475-7516</issn><issn>1475-7516</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNpNkM1KxDAUhYMoOI4-ghBwXXvz0yYVN2MZf2DETV2H9DZ1Kp3J0GQzrn0D39AnsWVEvItzD4fDWXyEXDK4ZqB1yqTKEpWxPOXAZMogBVBHZPaXH__zp-QshHcAnguhZ2RZrR1dRIt2Y2npw8b3_m1PK9e7gH7nbmj5fEd3vrdD92Fj57fURsoB6C39_vwatQCAc3LS2j64i98_J6_3y6p8TFYvD0_lYpWgKGRMciYE400hCtVq0WAmGoFOjYct1Iphq-oaaqdRa4a5ljLnFvM2l3WT1VaJObk67PoQOxOwiw7X6Ldbh9FwLlSmpR5b2aGFgw9hcK3ZDd3GDnvDwEzEzETDTDTMRGyKR2LiB3qpW8s</recordid><startdate>20141003</startdate><enddate>20141003</enddate><creator>Naess, Sigurd</creator><creator>Hasselfield, Matthew</creator><creator>McMahon, Jeff</creator><creator>Niemack, Michael D.</creator><creator>Addison, Graeme E.</creator><creator>Ade, Peter A. 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R. ; Allison, Rupert ; Amiri, Mandana ; Battaglia, Nick ; Beall, James A. ; de Bernardis, Francesco ; Bond, J Richard ; Britton, Joe ; Calabrese, Erminia ; Cho, Hsiao-mei ; Coughlin, Kevin ; Crichton, Devin ; Das, Sudeep ; Datta, Rahul ; Devlin, Mark J. ; Dicker, Simon R. ; Dunkley, Joanna ; Dünner, Rolando ; Fowler, Joseph W. ; Fox, Anna E. ; Gallardo, Patricio ; Grace, Emily ; Gralla, Megan ; Hajian, Amir ; Halpern, Mark ; Henderson, Shawn ; Hill, J. Colin ; Hilton, Gene C. ; Hilton, Matt ; Hincks, Adam D. ; Hlozek, Renée ; Ho, Patty ; Hubmayr, Johannes ; Huffenberger, Kevin M. ; Hughes, John P. ; Infante, Leopoldo ; Irwin, Kent ; Jackson, Rebecca ; Kasanda, Simon Muya ; Klein, Jeff ; Koopman, Brian ; Kosowsky, Arthur ; Li, Dale ; Louis, Thibaut ; Lungu, Marius ; Madhavacheril, Mathew ; Marriage, Tobias A. ; Maurin, Loïc ; Menanteau, Felipe ; Moodley, Kavilan ; Munson, Charles ; Newburgh, Laura ; Nibarger, John ; Nolta, Michael R. ; Page, Lyman A. ; Pappas, Christine ; Partridge, Bruce ; Rojas, Felipe ; Schmitt, Benjamin L. ; Sehgal, Neelima ; Sherwin, Blake D. ; Sievers, Jon ; Simon, Sara ; Spergel, David N. ; Staggs, Suzanne T. ; Switzer, Eric R. ; Thornton, Robert ; Trac, Hy ; Tucker, Carole ; Uehara, Masao ; Engelen, Alexander Van ; Ward, Jonathan T. ; Wollack, Edward J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c394t-613312d9397f83dc53d3ce7777cf0b71cf7bb0be8c881c684462ac6f64bd5ba73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>AMPLITUDES</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>CALIBRATION</topic><topic>COSMOLOGICAL MODELS</topic><topic>COSMOLOGY</topic><topic>CRAB NEBULA</topic><topic>GHZ RANGE 100-1000</topic><topic>NOISE</topic><topic>PEAKS</topic><topic>PERTURBATION THEORY</topic><topic>POINT SOURCES</topic><topic>POLARIMETERS</topic><topic>POLARIZATION</topic><topic>RELICT RADIATION</topic><topic>RESOLUTION</topic><topic>SPECTRA</topic><topic>TELESCOPES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Naess, Sigurd</creatorcontrib><creatorcontrib>Hasselfield, Matthew</creatorcontrib><creatorcontrib>McMahon, Jeff</creatorcontrib><creatorcontrib>Niemack, Michael D.</creatorcontrib><creatorcontrib>Addison, Graeme E.</creatorcontrib><creatorcontrib>Ade, Peter A. R.</creatorcontrib><creatorcontrib>Allison, Rupert</creatorcontrib><creatorcontrib>Amiri, Mandana</creatorcontrib><creatorcontrib>Battaglia, Nick</creatorcontrib><creatorcontrib>Beall, James A.</creatorcontrib><creatorcontrib>de Bernardis, Francesco</creatorcontrib><creatorcontrib>Bond, J Richard</creatorcontrib><creatorcontrib>Britton, Joe</creatorcontrib><creatorcontrib>Calabrese, Erminia</creatorcontrib><creatorcontrib>Cho, Hsiao-mei</creatorcontrib><creatorcontrib>Coughlin, Kevin</creatorcontrib><creatorcontrib>Crichton, Devin</creatorcontrib><creatorcontrib>Das, Sudeep</creatorcontrib><creatorcontrib>Datta, Rahul</creatorcontrib><creatorcontrib>Devlin, Mark J.</creatorcontrib><creatorcontrib>Dicker, Simon R.</creatorcontrib><creatorcontrib>Dunkley, Joanna</creatorcontrib><creatorcontrib>Dünner, Rolando</creatorcontrib><creatorcontrib>Fowler, Joseph W.</creatorcontrib><creatorcontrib>Fox, Anna E.</creatorcontrib><creatorcontrib>Gallardo, Patricio</creatorcontrib><creatorcontrib>Grace, Emily</creatorcontrib><creatorcontrib>Gralla, Megan</creatorcontrib><creatorcontrib>Hajian, Amir</creatorcontrib><creatorcontrib>Halpern, Mark</creatorcontrib><creatorcontrib>Henderson, Shawn</creatorcontrib><creatorcontrib>Hill, J. Colin</creatorcontrib><creatorcontrib>Hilton, Gene C.</creatorcontrib><creatorcontrib>Hilton, Matt</creatorcontrib><creatorcontrib>Hincks, Adam D.</creatorcontrib><creatorcontrib>Hlozek, Renée</creatorcontrib><creatorcontrib>Ho, Patty</creatorcontrib><creatorcontrib>Hubmayr, Johannes</creatorcontrib><creatorcontrib>Huffenberger, Kevin M.</creatorcontrib><creatorcontrib>Hughes, John P.</creatorcontrib><creatorcontrib>Infante, Leopoldo</creatorcontrib><creatorcontrib>Irwin, Kent</creatorcontrib><creatorcontrib>Jackson, Rebecca</creatorcontrib><creatorcontrib>Kasanda, Simon Muya</creatorcontrib><creatorcontrib>Klein, Jeff</creatorcontrib><creatorcontrib>Koopman, Brian</creatorcontrib><creatorcontrib>Kosowsky, Arthur</creatorcontrib><creatorcontrib>Li, Dale</creatorcontrib><creatorcontrib>Louis, Thibaut</creatorcontrib><creatorcontrib>Lungu, Marius</creatorcontrib><creatorcontrib>Madhavacheril, Mathew</creatorcontrib><creatorcontrib>Marriage, Tobias A.</creatorcontrib><creatorcontrib>Maurin, Loïc</creatorcontrib><creatorcontrib>Menanteau, Felipe</creatorcontrib><creatorcontrib>Moodley, Kavilan</creatorcontrib><creatorcontrib>Munson, Charles</creatorcontrib><creatorcontrib>Newburgh, Laura</creatorcontrib><creatorcontrib>Nibarger, John</creatorcontrib><creatorcontrib>Nolta, Michael R.</creatorcontrib><creatorcontrib>Page, Lyman A.</creatorcontrib><creatorcontrib>Pappas, Christine</creatorcontrib><creatorcontrib>Partridge, Bruce</creatorcontrib><creatorcontrib>Rojas, Felipe</creatorcontrib><creatorcontrib>Schmitt, Benjamin L.</creatorcontrib><creatorcontrib>Sehgal, Neelima</creatorcontrib><creatorcontrib>Sherwin, Blake D.</creatorcontrib><creatorcontrib>Sievers, Jon</creatorcontrib><creatorcontrib>Simon, Sara</creatorcontrib><creatorcontrib>Spergel, David N.</creatorcontrib><creatorcontrib>Staggs, Suzanne T.</creatorcontrib><creatorcontrib>Switzer, Eric R.</creatorcontrib><creatorcontrib>Thornton, Robert</creatorcontrib><creatorcontrib>Trac, Hy</creatorcontrib><creatorcontrib>Tucker, Carole</creatorcontrib><creatorcontrib>Uehara, Masao</creatorcontrib><creatorcontrib>Engelen, Alexander Van</creatorcontrib><creatorcontrib>Ward, Jonathan T.</creatorcontrib><creatorcontrib>Wollack, Edward J.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of cosmology and astroparticle physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Naess, Sigurd</au><au>Hasselfield, Matthew</au><au>McMahon, Jeff</au><au>Niemack, Michael D.</au><au>Addison, Graeme E.</au><au>Ade, Peter A. R.</au><au>Allison, Rupert</au><au>Amiri, Mandana</au><au>Battaglia, Nick</au><au>Beall, James A.</au><au>de Bernardis, Francesco</au><au>Bond, J Richard</au><au>Britton, Joe</au><au>Calabrese, Erminia</au><au>Cho, Hsiao-mei</au><au>Coughlin, Kevin</au><au>Crichton, Devin</au><au>Das, Sudeep</au><au>Datta, Rahul</au><au>Devlin, Mark J.</au><au>Dicker, Simon R.</au><au>Dunkley, Joanna</au><au>Dünner, Rolando</au><au>Fowler, Joseph W.</au><au>Fox, Anna E.</au><au>Gallardo, Patricio</au><au>Grace, Emily</au><au>Gralla, Megan</au><au>Hajian, Amir</au><au>Halpern, Mark</au><au>Henderson, Shawn</au><au>Hill, J. Colin</au><au>Hilton, Gene C.</au><au>Hilton, Matt</au><au>Hincks, Adam D.</au><au>Hlozek, Renée</au><au>Ho, Patty</au><au>Hubmayr, Johannes</au><au>Huffenberger, Kevin M.</au><au>Hughes, John P.</au><au>Infante, Leopoldo</au><au>Irwin, Kent</au><au>Jackson, Rebecca</au><au>Kasanda, Simon Muya</au><au>Klein, Jeff</au><au>Koopman, Brian</au><au>Kosowsky, Arthur</au><au>Li, Dale</au><au>Louis, Thibaut</au><au>Lungu, Marius</au><au>Madhavacheril, Mathew</au><au>Marriage, Tobias A.</au><au>Maurin, Loïc</au><au>Menanteau, Felipe</au><au>Moodley, Kavilan</au><au>Munson, Charles</au><au>Newburgh, Laura</au><au>Nibarger, John</au><au>Nolta, Michael R.</au><au>Page, Lyman A.</au><au>Pappas, Christine</au><au>Partridge, Bruce</au><au>Rojas, Felipe</au><au>Schmitt, Benjamin L.</au><au>Sehgal, Neelima</au><au>Sherwin, Blake D.</au><au>Sievers, Jon</au><au>Simon, Sara</au><au>Spergel, David N.</au><au>Staggs, Suzanne T.</au><au>Switzer, Eric R.</au><au>Thornton, Robert</au><au>Trac, Hy</au><au>Tucker, Carole</au><au>Uehara, Masao</au><au>Engelen, Alexander Van</au><au>Ward, Jonathan T.</au><au>Wollack, Edward J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Atacama Cosmology Telescope: CMB polarization at 200 < ℓ < 9000</atitle><jtitle>Journal of cosmology and astroparticle physics</jtitle><date>2014-10-03</date><risdate>2014</risdate><volume>2014</volume><issue>10</issue><spage>7</spage><epage>7</epage><pages>7-7</pages><issn>1475-7516</issn><eissn>1475-7516</eissn><abstract>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 {sup 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{sup o} ± 0.6{sup o} when smoothed with a 5' Gaussian beam.</abstract><cop>United States</cop><doi>10.1088/1475-7516/2014/10/007</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1475-7516 |
| ispartof | Journal of cosmology and astroparticle physics, 2014-10, Vol.2014 (10), p.7-7 |
| issn | 1475-7516 1475-7516 |
| language | eng |
| recordid | cdi_osti_scitechconnect_22375848 |
| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | AMPLITUDES ASTROPHYSICS, COSMOLOGY AND ASTRONOMY CALIBRATION COSMOLOGICAL MODELS COSMOLOGY CRAB NEBULA GHZ RANGE 100-1000 NOISE PEAKS PERTURBATION THEORY POINT SOURCES POLARIMETERS POLARIZATION RELICT RADIATION RESOLUTION SPECTRA TELESCOPES |
| title | The Atacama Cosmology Telescope: CMB polarization at 200 < ℓ < 9000 |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-19T02%3A27%3A36IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-crossref_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20Atacama%20Cosmology%20Telescope:%20CMB%20polarization%20at%20200%20%3C%20%E2%84%93%20%3C%209000&rft.jtitle=Journal%20of%20cosmology%20and%20astroparticle%20physics&rft.au=Naess,%20Sigurd&rft.date=2014-10-03&rft.volume=2014&rft.issue=10&rft.spage=7&rft.epage=7&rft.pages=7-7&rft.issn=1475-7516&rft.eissn=1475-7516&rft_id=info:doi/10.1088/1475-7516/2014/10/007&rft_dat=%3Ccrossref_osti_%3E10_1088_1475_7516_2014_10_007%3C/crossref_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |